Publications Organic and Perovskite Solar Cells
2021
Ion Movement Explains Huge VOC Increase despite Almost Unchanged Internal Quasi‐Fermi‐Level Splitting in Planar Perovskite Solar Cells
U. Würfel, J. Herterich, M. Unmüssig, G. Loukeris, M. Kohlstädt
Energy Technol., 2021, 2001104, https://doi.org/10.1002/ente.202001104
A 1 cm2 Organic Solar Cell with 15.2% Certified Efficiency: Detailed Characterization and Identification of Optimization Potential
U. Würfel, J. Herterich, M. List, J. Faisst, H.-F. Schleiermacher, K. Knupfer, B. Zimmermann
Solar RRL, 2021, 2000802, https://doi.org/10.1002/solr.202000802
2020
New Fullerene Derivative as an n‐Type Material for Highly Efficient, Flexible Perovskite Solar Cells of a p‐i‐n Configuration
T. Ahmad, B. Wilk, E. Radicchi, R. F. Pineda, P. Spinelli, J. Herterich, L. A. Castriotta, S. Dasgupta, E. Mosconi, F. De Angelis, M. Kohlstädt, U. Würfel, A. Di Carlo, K. Wojciechowski
Adv. Funct. Mater. 30, 2020, 2004357, https://doi.org/10.1002/adfm.202004357
Experiences of Continuous On-Sun Performance Measurements of Perovskite Mini-Modules
M. Norton, M. Kohlstädt, M. Hadjipanayi, V. Paraskeva, U. Würfel, G.E. Georghiou
37th European Photovoltaic Solar Energy Conference and Exhibition, Session 3BO.10.4, 606-610, doi:10.4229/EUPVSEC20202020-3BO.10.4
Direct Correlation of Nanoscale Morphology and Device Performance to Study Photocurrent Generation in Donor-Enriched Phases of Polymer Solar Cells
S. B. Dkhil, P. Perkhun, C. Luo, D. Müller, R. Alkarsifi, E. Barulina, Y. A. Avalos Quiroz, O. Margeat, S. T. Dubas, T. Koganezawa, D. Kuzuhara, N. Yoshimoto, C. Caddeo, A. Mattoni, B. Zimmermann, U. Würfel, M. Pfannmöller, S. Bals, J. Ackermann, C. Videlot-Ackermann
ACS Appl. Mater. Interfaces 12, 2020, 28404−28415,https://doi.org/10.1021/acsami.0c05884
Low-Power Organic Light Sensor Array Based on Active-Matrix Common-Gate Transimpedance Amplifier on Foil for Imaging Applications
S. Elsaegh, C. Veit, U. Zschieschang, M. Amayreh, F. Letzkus, H. Sailer, M. Jurisch, J. N. Burghartz, U. Würfel, H. Klauk, H. Zappe, Y. Manoli
IEEE J. Solid-State Circuits 55 (9), 2020, 2553-2566, https://doi.org/10.1109/JSSC.2020.2993732
Visualizing Morphological Principles for Efficient Photocurrent Generation in Organic Non-fullerene Acceptor Blends
W. Köntges, P. Perkhun, J. Kammerer, R. Alkarsifi, U. Würfel, O. Margeat, C. Videlot-Ackermann, J.-J. Simon, R. R. Schröder, J. Ackermann, M. Pfannmöller
Energy Environ. Sci. 13, 2020, 1259--1268, https://doi.org/10.1039/c9ee03535d
2019
O. A. Ibraikulov, J. Wang, N. Kamatham, B. Heinrich, S. Méry, M. Kohlstädt, U. Würfel, S. Ferry, N. Leclerc,T. Heiser, P. Lévêque
ITO-Free Organic Photovoltaic Modules Based on Fluorinated Polymers Deposited from Non-Halogenated Solution: A Major Step Toward Large-Scale Module Production
Solar RRL, 2019, 1900273, https://doi.org/10.1002/solr.201900273
L. E. Mundt, W. Kwapil, M. A. Yakoob, J. P. Herterich, M. Kohlstädt , U. Würfel, M. C. Schubert, S. W. Glunz
Quantitative Local Loss Analysis of Blade-Coated Perovskite Solar Cells
IEEE J. Photovolt. 9 (2), (2019), 452-459, https://doi.org/10.1109/JPHOTOV.2018.2888835
U. Würfel, L. Perdigón-Toro, J. Kurpiers, C. M. Wolff, P. Caprioglio, J. J. Rech, J. Zhu, X. Zhan, W. You, S. Shoaee, D. Neher, M. Stolterfoht
Recombination between Photogenerated and Electrode-Induced Charges Dominates the Fill Factor Losses in Optimized Organic Solar Cells
J. Phys. Chem. Lett. 10 (12), 2019, 3473–3480, https://doi.org/10.1021/acs.jpclett.9b01175
2018
U. Würfel, M. Unmüssig
Apparent Field‐Dependence of the Charge Carrier Generation in Organic Solar Cells as a Result of (Bimolecular) Recombination
Solar RRL, 2018, 1800229, https://doi.org/10.1002/solr.201800229
M. List, T. Sarkar, P. Perkhun, J. Ackermann, C. Luo, U. Würfel
Correct Determination of Charge Transfer State Energy from Luminescence Spectra in Organic Solar Cells
Nat. Commun, 9 (2018), 3631, https://doi.org/10.1038/s41467-018-05987-8
M. Kohlstädt, M. A. Yakoob, U. Würfel
A Matter of Drying: Blade-Coating of Lead Acetate Sourced Planar Invereted Perovskite Solar Cells on Active Areas > 1 cm²
Phys. Status Solidi A (2018), 1800419, https://doi.org/10.1002/pssa.201800419
C. Reichel, U.Würfel, K. Winkler, H.-F. Schleiermacher, M. Kohlstädt, M. Unmüssig, C. A. Messmer, M. Hermle, S. W. Glunz
Electron-selective contacts via ultra-thin organic interface dipoles for silicon organic heterojunction solar cells
J. Appl. Phys. 123 (2018), 024505, https://doi.org/10.1063/1.5010937
2017
L. Wagner, L. E. Mundt, G. Mathiazhagan, M. Mundus, M. C. Schubert, S. Mastroianni, U. Würfel, A. Hinsch, S. W. Glunz
Distinguishing Crystallization Stages and Their Influence on Quantum Efficiency uring Perovskite Solar Cell Formation in Real-time
Scientific Reports 7 (2017), https://doi.org/10.1038/s41598-017-13855-6
P. Schulze, A. C. Bett, K. Winkler, A. Hinsch, S. Lee, S. Mastroianni, L. E. Mundt, M. Mundus, U. Würfel, S. W. Glunz, M. Hermle, J. C. Goldschmidt
Novel Low-Temperature Process for Perovskite Solar Cells with a Mesoporous TiO2 Scaffold
ACS Appl. Mater. Interfaces 9 (36), (2017), 30567–30574, https://doi.org/10.1021/acsami.7b05718
M. Mundus, B. Venkataramanachar, R. Gehlhaar, M. Kohlstädt, B. Niesen, W. Qiu, J. P. Herterich, F. Sahli, M. Bräuninger, J. Werner, J. Hohl-Ebinger, G. Uytterhoeven, U. Würfel, C. Ballif, M. Schubert, W. Warta, S. W.
Glunz
Spectrally Resolved Nonlinearity and Temperature Dependence of Perovskite Solar Cells
Sol. Energy Mater Sol. Cells 172 (2017), 66–73, https://doi.org/10.1016/j.solmat.2017.07.013
A. Raba, A., Y. Leroy, M. Kohlstädt, U. Würfel, A.-S. Cordan
Organic Solar Cells: Extraction of Physical Parameters by Means of Markov Chain Monte Carlo Techniques
IEEE J. Photovolt. 7 (4), (2017), 1098-1104, https://doi.org/10.1109/JPHOTOV.2017.2690876
A. V. Akkuratov, S. Mühlbach, D.K. Susarova, M. Seßler, B. Zimmermann, V. F. Razumov, U. Würfel, P. A. Troshin
Positive Side of Disorder: Statistical Fluorene-Carbazole-TTBTBTT Terpolymers Show Improved Optoelectronic and Photovoltaic Properties Compared to the Regioregular Structures
Sol. Energy Mater Sol. Cells 160 (2017), 346-354, https://doi.org/10.1016/j.solmat.2016.10.039
A. Spies, M. List, T. Sarkar, U. Würfel
On the Impact of Contact Selectivity and Charge Transport on the Open‐Circuit Voltage of Organic Solar Cells
2016
E. Zimmermann, K. K. Wong, M. Müller, H. Hu, P. Ehrenreich, M. Kohlstädt, U. Würfel, S. Mastroianni, G. Mathiazhagan, A. Hinsch, T P. Gujar, M. Thelakkat, T. Pfadler, L. Schmidt-Mende
Characterization of Perovskite Solar Cells: towards a Reliable Measurement Protocol
APL Materials 4 (2016), 091901, https://doi.org/10.1063/1.4960759
U. Würfel, M. Seßler, M. Unmüssig, N. Hofmann, M. List, E. Mankel, T. Mayer, G. Reiter, J.-L. Bubendorff, L. Simon, M. Kohlstädt
How Molecules with Dipole Moments Enhance the Selectivity of Electrodes in Organic Solar Cells – A Combined Experimental and Theoretical Approach
Adv. Energy Mater. 6 (19), (2016), 1600594, https://doi.org/10.1002/aenm.201600594
S. Röttinger, B. Schwarz, S. Schäfer, R. Gauch, B. Zimmermann, U. Würfel
Laser Patterning of Vacuum Processed Small Molecular Weight Organic Photovoltaics
Sol. Energy Mater Sol. Cells 154 (2016), 35-41, https://doi.org/10.1016/j.solmat.2016.04.032
C. Owens, G. M. Ferguson, M. Hermenau, E. Voroshazi, Y. Galagan, B. Zimmermann, R. Rösch, D. Angmo, G. Teran-Escobar, C. Uhrich, R. Andriessen, H. Hoppe, U. Würfel, M. Lira-Cantu, F. C. Krebs, D. M. Tanenbaum
Comparative Indoor and Outdoor Degradation of Organic Photovoltaic Cells via Inter-laboratory Collaboration
Polymers 8 (1), 2016, 1-8, https://doi.org/10.3390/polym8010001
2015
S. Mastroianni, F. D. Heinz, J.-H. Im, W. Veurman, M. Padilla, M. C. Schubert, U. Würfel, M. Grätzel, N.-G. Park, A. Hinsch
Analysing the Effect of Crystal Size and Structure in Highly Efficient CH3NH3PbI3 Perovskite Solar Cells by Spatially Resolved Photo- and Electroluminescence Imaging
Nanoscale 7 (46), (2015), 19653-19662, https://doi.org/10.1039/c5nr05308k
U. Würfel, A. Cuevas, P. Würfel
Charge Carrier Separation in Solar Cells
IEEE J. Photovolt. 5 (1), (2015), 461-469, https://doi.org/10.1109/JPHOTOV.2014.2363550
U .Würfel, D. Neher, A. Spies, S. Albrecht
Nat. Commun. 6 (2015), 6951, https://doi.org/10.1038/ncomms7951
R. Steim, P. Chabrecek, U. Sonderegger, B. Kindle-Hasse, W. Siefert, T. Kroyer, P. Reinecke, T. Lanz, T. Geiger, R. Hany, F. Nüesch
Laminated Fabric as Top Electrode for Organic Photovoltaics
Appl. Phys. Lett. 106 (2015), 193301, https://doi.org/10.1063/1.4919940
D. Kaduwal, H. F. Schleiermacher, J. Schulz-Gericke, S. Schiefer, J. Zhang, B Zimmermann
Layout Flexibility for Sheet-to-Sheet Produced Flexible ITO-free Organic Solar Modules with Organic Functional
Slot Die Coated under Ambient Atmospheric
Sol. Energy Mater Sol. Cells 136 (2015), 200-205, https://doi.org/10.1016/j.solmat.2014.11.043
J. Reinhardt, P. Apilo, B. Zimmermann, S. Rousu, U. Würfel
Determining the Photocurrent of Individual Cells within an Organic Solar Module by LBIC and the Filtering Approach: Experiments and Simulations
Sol. Energy Mater Sol. Cells 134 (2015), 157-164, https://doi.org/10.1016/j.solmat.2014.11.032
2014
S. B. Sapkota, A. Spies, B. Zimmermann, I. Dürr, U. Würfel
Promising Long-Term Stability of Encapsulated ITO-Free Bulk-Heterojunction Organic Solar Cells under Different Aging Conditions
Sol. Energy Mater Sol. Cells 130 (2014), 144-150, https://doi.org/10.1016/j.solmat.2014.07.004
B. Arredondo, B. Romero, G. DelPozo, M. Sessler, C. Veit, U. Würfel
Impedance Spectroscopy Analysis of Small Molecule Solution Processed Organic Solar Cells
Sol. Energy Mater Sol. Cells 128 (2014), 351-356, https://doi.org/10.1016/j.solmat.2014.05.050
M. Sessler, A. Saeed, M. Kohlstädt, U. Würfel
Systematic Variation of the Stabilizer to Reduce The Annealing Temperature of Sol-Gelderived Titanium Oxide in Inverted Organic Solar Cells
Org. Electron. 15 (7), (2014), 1407-1412, https://doi.org/10.1016/j.orgel.2014.04.012
J. Reinhardt, M. Grein, C. Bühler, M. Schubert, U. Würfel
Identifying the Impact of Surface Recombination at Electrodes in Organic Solar Cells by Means of Electroluminescence and Modeling
Adv. Energy Mater. 4 (11), (2014), 1400081, https://doi.org/10.1002/aenm.201400081
D. Kaduwal, H. F. Schleiermacher, J. Schulz-Gericke, T. Kroyer, B. Zimmermann, U. Würfel
ITO-free Organic Solar Cells with Roll-to-Roll Coated Organic Functional Layers from Non-halogenated Solvents
Sol. Energy Mater Sol. Cells 124 (2014), 92-97, https://doi.org/10.1016/j.solmat.2014.02.001
H. Ahme, M. Lee, C. Im, U. Würfel
Influence of the Acceptor on Electrical Performance and Charge Carrier Transport in Bulk Heterojunction Solar Cells With HXS-1
J. Phys. Chem. C 118 (7), (2014), 3386–3392, https://doi.org/10.1021/jp408705r
S. Schiefer, B. Zimmermann, U. Würfel
Determination of the Intrinsic and the Injection Dependent Charge Carrier Density in Organic Solar Cells Using the Suns-Voc Method
J. Appl. Phys. 115 (2014), 044506, https://doi.org/10.1063/1.4862960
S. Schiefer, B. Zimmermann, S. W. Glunz, U. Würfel
Applicability of the Suns-VOC Method on Organic Solar Cells
IEEE J. Photovolt. 4 (1), (2014), 271-277, https://doi.org/10.1109/JPHOTOV.2013.2288527
S. B. Sapkota, M. Fischer, B. Zimmermann, U. Würfel
Analysis of the Degradation Mechanism of ITO-Free Organic Solar Cells under UV Radiation
Sol. Energy Mater Sol. Cells 121 (2014), 43-48, https://doi.org/10.1016/j.solmat.2013.10.021
D. Kaduwal, B. Zimmermann, U. Würfel
ITO-Free Laminated Concept for Flexible Organic Solar Cells
Sol. Energy Mater Sol. Cells 120, Part B, (2014), 449-453, https://doi.org/10.1016/j.solmat.2013.09.024
2013
R. Hanfland, M. A. Fischer, W. Brüttling, U. Würfel, R. C. I. Mackenzie
The Physical Meaning of Charge Extraction by Linearly Increasing Voltage Transients from Organic Solar Cells
Appl. Phys. Lett. 103 (2013), 063904, https://doi.org/10.1063/1.4818267
M. Kohlstädt, M. Grein, P. Reinecke, T. Kroyer, B. Zimmermann, U. Würfel
Inverted ITO- And PEDOT:PSS-Free Polymer Solar Cells with High Power Conversion Efficiency
Sol. Energy Mater Sol. Cells 113 (2013), 98-102, https://doi.org/10.1016/j.solmat.2013.05.023
B. Arredondo, C. D. Dios, R. Vergaz, A. R. Criado, B. Romero, B Zimmermann, U. Würfel
Performance of ITO-Free Inverted Organic Bulk Heterojunction Photodetectors: Comparison with Standard Device Architecture
Org. Electron. 14 (10), (2013), 2484-2490, https://doi.org/10.1016/j.orgel.2013.06.018
S. Schiefer, B. Zimmermann, U. Würfel
Layout Optimization of Organic Wrap Through Solar Cells by Combined Electrical and Optical Modeling
Sol. Energy Mater Sol. Cells 115 (2013), 29-35, https://doi.org/10.1016/j.solmat.2013.03.018
S. Shao, J. Liu, J Bergqvist, S: Shi, C: Veit, U. Würfel, Z. Xie, F. Zhang
In Situ Formation of Moo3 in PEDOT:PSS Matrix: A Facile Way to Produce a Smooth and Less Hygroscopic
Hole Transport Layer for Highly Stable Polymer Bulk Heterojunction Solar Cell
Adv. Energy Mater. 3 (3), (2013), 349-355, https://doi.org/10.1002/aenm.201200609
F. Stelzl, J. Schulz-Gericke, M. Niggemann, U. Würfel
High Yield Fabrication of Vertical Interdigital Electrodes with Sub Micrometer Distance and their Application in an Organic Photovoltaic Device
Org. Electron. 14 (2), (2013), 535-541, https://doi.org/10.1016/j.orgel.2012.11.022
2012
P. Kopola, B. Zimmerman, A. Filipovic, H.F. Schleiermacher, J. Greulich, S. Rousu, J. Hast, R. Myllyla, U. Würfel
Aerosol Jet Printed Grid for ITO-free Inverted Organic Solar Cells
Sol. Energy Mater Sol. Cells 107 (2012), 252-258, https://doi.org/10.1016/j.solmat.2012.06.042
R. Rösch, D. M. Tanenbaum, M. Jorgensen, M. Seeland, M. Bärenklau, M. Hermenau, E. Voroshazi, M. T. Lloyd, Y. Galagan, B. Zimmermann, U. Würfel, M. Hösel, H. F. Dam, S. A. Gevorgyan, S. Kudret, W. Maes, L. Lutsen, D. Vanderzande, R. Andriessen, G. Teran-Escobar, M. Lira-Cantu, A. Rivato, G.Y. Uzunolu, D. Germack, B. Andreasen, M. V. Madsen, K. Norman, H. Hoppe, F. C. Krebs
Investigation of the Degradation Mechanisms of Variety of Organic Photovoltaic Devices by Combination of Imaging Techniques- The ISOS-3 Inter-laboratory Collaboration
Energy Environ. Sci. 5 (2012), 6521-6540, https://doi.org/10.1039/C2EE03508A
G. Teran-Escobar, D. M. Tanenbaum, E. Voroshazi, M. Hermenau, K. Norrman, M. T. Lloyd, Y. Galagan, B. Zimmermann, M. Hösel, H. F. Dam, M. Jørgensen, S. Gevorgyan, S. Kudret, W. Maes, L. Lutsen, D. Vanderzande, U. Würfel, R. Andriessen, R. Rösch, H. Hoppe, A. Rivaton, G. Y. Uzunoğlu, D. Germack, B. Andreasen, M. V. Madsen, E. Bundgaard, F. C. Krebs, M. Lira-Cantu
On the Stability of a Variety of Organic Photovoltaic Devices by IPCE and In Situ IPCE Analyses – the ISOS-3 Inter-laboratory Collaboration
Phys. Chem. Chem. Phys. 14 (2012), 11824-11845, https://doi.org/10.1039/C2CP40821J
D. M. Tanenbaum, M. Hermenau, E. Voroshazi, M. T. Lloyd, Y. Galagan, B. Zimmermann, M. Hösel, H. F. Dam, S. A. Gevorgyan, S. Kudret, W. Maes, L. Lutsen, D. Vanderzande, U. Würfel, R. Andriessen, G. Teran-Escobar, M. Lira-Cantu, A. Rivato, G. Y. Uzunolu, D. Germack, B. Andreasen, M. V. Madsen, K. Norman, H. Hoppe, F. C. Krebs
The ISOS-3 Inter-laboratory Collaboration Focused on the Stability of a Variety of Organic photovoltaic devices
RSC Adv., 2 (2012), 882-893, https://doi.org/10.1039/C1RA00686J
T. Richter, C. Braun, S. Link, M. Scheuble, J.W. Crossland, F.F. Stelzl, U. Würfel, S. Ludwigs
Regioregular Polythiophenes with Alkyilthiophene Side Chains
Macromolecules, 45 (14), (2012), 5782–5788, https://doi.org/10.1021/ma2026644
F. F. Stelzl, U. Würfel
Modeling the Influence of Doping on the Performance of Bulk Heterojunction Organic Solar Cells: One-dimensional Effective Semiconductor Versus Two-dimensional Donor/Acceptor Model
Phys. Rev. B 86 (7), (2012), 075315, https://doi.org/10.1103/PhysRevB.86.075315
H. S. Mangold, T. V. Richter, S. Link, U. Würfel, S. Ludwigs
Optoelectronic Properties of Hyperbranched Polythiophenes
J. Phys. Chem. B, 116 (1), (2012), 154–159, https://doi.org/10.1021/jp210822s
R. R. Sondergaard, T. Makris, P. Lianos, A. Manor, E. A. Katz, W. W. Gong, S. M. Tuladhar, J. Nelson, R. Tuomi, P. Sommerling, S. C. Veenstra, A. Rivaton, A. Dupuis, G. Teran-Escobar, M. Lira-Cantu, S. B. Sapkota, B. Zimmermann, U. Würfel, A. Matzarakis, F. C. Krebs
The Use of Polyurethane as Encapsulating Method for Polymer Solar Cells - An Inter-laboratory Study on Outdoor Stability in 8 Countries
Sol. Energy Mater Sol. Cells 99 (2012), 292-300, https://doi.org/10.1016/j.solmat.2011.12.013
Y. Galagan, B. Zimmermann, E.W. Coenen, M. Jorgensen, D. Tanenbaum, F. C. Krebs, H. Gorter, S. Sabik, L. Slooff, S. Veenstra, J. M. Kroon, R. Andriessen
Current Collecting Grids for ITO-Free Solar Cells
Adv. Energy Mater. 2 (1), (2012), 103-110, https://doi.org/10.1002/aenm.201100552
Y. Galagan, B. Zimmermann, E. W. Coenen, M. Jorgensen, D. Tanenbaum, F.C. Krebs, H. Gorter, S. Sabik, L. Slooff, S. Veenstra, J. M. Kroon, R. Andriessen
Organic Solar Cells: Current Collecting for ITO-Free Solar Cells
Adv. Energy Mater. 2 (1), (2012), 169-169, https://doi.org/10.1002/aenm.201290005
F. F. Stelzl, U. Würfel, J. Schulz-Gericke, E. Crossland, S. Ludwigs
Voltage-induced Formation of Accumulation Layers at Electrode Interfaces in Organic Solar Cells
Adv. Energy Mater. 2 (8), (2012), 983-991, https://doi.org/10.1002/aenm.201100569
2011
C. Du, C. Li, W. Li, X. Chen, Z. Bo, C. Veit, Z. Ma, U. Würfel, H. Zhu, W. Hu, F. Zhang
9-Alkylidene-9 H-Fluorene-Containing Polymer for High-Efficiency Polymer Solar Cells
Molecules, 44 (19), (2011), 7617–7624, https://doi.org/10.1021/ma201477b
W. Li, Y. Zhou, V. B. Andersson, M. L. Andersson, Y. Thomann, C. Veit, K. Tvingstedt, R. Quin, Z. Bo, O. Inganas, U. Würfel, F. Zhang
The Effect of Additive on Performance and Shelf-stability of HSX-1/PCBM photovoltaic devices
Org. Electron. 12 (9), (2011), 1544-1551, https://doi.org/10.1016/j.orgel.2011.05.028
Y. Zhou, M. Eck, C. Veit, B .Zimmermann, F. Rauscher, P. Niyamakom, S. Yilmaz, I. Dumsch, S .Allard, U. Scherf, M. Krüger
Efficiency Enhancement for Bulk-Heterojunction Hybrid Solar Cells Based on Acid Treated CdSe Quantum Dots and Low Bandgap Polymer PCPDTBT
Sol. Energy Mater Sol. Cells 95 (4), (2011), 1232-1237, https://doi.org/10.1016/j.solmat.2010.12.041
B. V. Andersson, U. Würfel, O. Inganas
Full Day Modelling of V-shaped Organic Solar Cell
Sol Energy 85 (6), (2011), 1257-1263, https://doi.org/10.1016/j.solener.2010.10.017
S. Schäfer, A. Petersen, T. A. Wagner, R. Kniprath, D. Lingenfelser, A. Zen, T. Kirchartz, B. Zimmermann, U. Würfel, X. Feng, T. Mayer
Influence of the Indium Tin Oxide/Organic Interface on Open-Circuit Voltage, Recombination, and Cell Degradation in Organic Small-Molecule Solar Cells
Phys. Rev. B 83 (16), (2011), 165311, https://doi.org/10.1103/PhysRevB.83.165311
S. A. Gevorgyan, A. J. Medford, E. Bundgaard, S.B. Sapkota, H. F. Schleiermacher, B. Zimmermann, U .Würfel, A. Chafiq, M. Lira-Cantu, T. Swonke, M. Wagner, C.J. Brabec, O. Haillant, E. Voroshazi, T. Aernouts, R. Steim, J.A. Hauch, A. Elschner, M. Pannone, M. Xiao, A. Langzettel, D. Laird, M.T. Lloyd, T. Rath, E. Maier, G. Trimmel, M. Hermenau, T. Menke, K. Leo, R. Rösch, M. Seeland, H. Hoppe, T.J. Nagle, K.B. Burke, C.J. Fell, D. Vak, T.B. Singh, S.E. Watkins, Y. Galagen, A. Manor, E. A. Katz, T. Kim, K. Kim, P.M. Sommeling, WJ.H. Verhees, S. C. Veenstra, M. Riede, M. Greyson Christoforo, T. Currier, V. Shrotriya, G. Schwartz, F. C. Krebs
An Inter-Laboratory Stability Study of Roll-to-Roll Coated Flexible Polymer Solar Modules
Sol. Energy Mater Sol. Cells 95 (5), (2011), 1398-1416, https://doi.org/10.1016/j.solmat.2011.01.010
B. Zimmermann, H. F. Schleiermacher, M. Niggemann, U. Würfel
ITO-free Flexible Inverted Organic Solar Cell Modules with High Fill Factor Prepared by Slot Die Coating
Sol. Energy Mater Sol. Cells 95 (7), (2011), 1587-1589, https://doi.org/10.1016/j.solmat.2010.11.025
L. M. Anderson, U. Würfel, O. Inganas, C. Müller, B. H. Badada, F. Zhang
Mobility and Fill Factor Correlation in Geminate Recombination Limited Solar Cells
J. Appl. Phys. 110, (2011), 024509, https://doi.org/10.1063/1.3609079
2010
Y. Zhou, F. Riehle, Y. Yuan, H.F. Schleiermacher, M. Niggemann, G. Urban, M. Krüger
Improved Efficiency of Hybrid Solar Cells Based on Non-Ligand-Exchanged CdSe Quantum Dots and Poly (3-hexylthiophene)
Appl. Phys. Lett. 96, (2010), 013304, https://doi.org/10.1063/1.3280370
T. V. Richter, F. F. Stelzl, J. Schulz-Gericke, B. Kerscher, U. Würfel, M. Niggemann, S. Ludwigs
Room Temperature Vacuum-Induced Ligand Removal and Patterning of ZnO Nanoparticles: from Semiconducting Films towards Printed Electronics
J. Mater. Chem. 20. (2010), 874-879, https://doi.org/10.1039/B916778C
2009
K. Skupien, P .Putyra, J. Walter, R. H. Kozlowski, G. Khelashvili, A. Hinsch, U. Würfel
Catalytic Materials Manufactured by the Polyol Process for Monolithic Dye-Sensitized Solar Cells
Prog Photovoltaics 17 (1), (2009), 67-73, https://doi.org/10.1002/pip.854
C. Siegers, B. Olah, U. Würfel, J. Hohl-Ebinger, A. Hinsch, R. Haag
Donor-Acceptor-Functionalized Polymers for Efficient Light Harvesting in the Dye Solar Cell
Sol. Energy Mater Sol. Cells 93 (5), (2009), 552-563, https://doi.org/10.1016/j.solmat.2008.11.038
M. Niggemann, U. Würfel, B. Zimmermann, W. Platzer
Energy from the Environment-Organic Solar Cells
Kunststoffe International 99 (4), (2009), 46-51
B. Zimmermann, U. Würfel, M. Niggemann
Longterm Stability of Efficient Inverted P3HT:PCCBM Solar Cells
Sol. Energy Mater Sol. Cells 93 (4), (2009), 491-496, https://doi.org/10.1016/j.solmat.2008.12.022
A. Hinsch, H. Brandt, W. Veurman, S. Hemming, M. Nittel, U. Würfel, P. Putyra, C. Lang-Koetz, M. Stabe, S. Beucker, K. Fichter
Dye Solar Modules for Facade Applications: Recent Results from Project ColorSol
Sol. Energy Mater Sol. Cells 93 (6-7), (2009), 820-824, https://doi.org/10.1016/j.solmat.2008.09.049
R. Qin, W. Li, C. Li, C. Du, C. Veit, H .F. Schleiermacher, M. Anderson, Z. Bo, Z. Liu, O. Inganas, U. Würfel, F. Zhang
A Planar Copolymer for High Efficiency Polymer Solar Cells
J. Am. Chem. Soc.,131 (41), (2009), 14612–14613, https://doi.org/10.1021/ja9057986
F. C. Krebs, S. A. Gevorgyan, B. Gholamkhass, S. Holdcroft, C. Schlenker, M. E. Thompson, B. C. Thompson, D. Olson, D. S. Ginley, S. E. Shaheen, H. N. Alshareef, J. W. Murphy, W. J. Youngblood, N. C. Heston, J. R. Reynolds, S. Jia, D. Laird, S. M. Tuladhar, J. G. A. Dane, P. Atienzar, J. Nelson, J. M. Kroon, M. M. Wienk, R. A .J. Janssen, K. Tvingstedt, F. Zhang, M. Andersson, O. Inganäs, M. Lira-Cantu, R. D. Bettignies, S. Guillerez, T. Aernouts, D. Cheyns, L. Lutsen, B. Zimmermann, U. Würfel, M. Niggemann, H. F. Schleiermacher, P. Liska, M. Grätzel, P. Lianos, E. A. Katz, W. Lohwasser, B. Jannon
A Round Robin Study of Flexible Large-Area Roll-To-Roll Processed Polymer Solar Cell Modules
Sol. Energy Mater Sol. Cells 93 (11), (2009), 820-824, https://doi.org/10.1016/j.solmat.2009.07.015
S. Janietz, H. Krügger, H.F. Schleiermacher, U. Würfel, M. Niggemann
Tailoring of Low Bandgap Polymer and its Performance Analysis in Organic Solar Cells
Macromol. Chem. Phys. 210 (18), (2009), 1493-1503, https://doi.org/10.1002/macp.200900133
2008
U. Würfel, M. Peters, A. Hinsch
Detailed Experimental and Theoretical Investigation of the Electron Transport in a Dye Solar Cell by Means of a Three-Electrode Configuration
J. Phys. Chem. C, 112 (5), (2008), 1711–1720, https://doi.org/10.1021/jp077016x
M. Riede, K. Sylvester-Hvid, M. Glatthaar, M. Niggemann, B. Zimmermann, N. Keegan, A. Liehr, T. Ziegler, G. Willeke, A. Gombert
High Throughput Testing Platform for Organic Solar Cells
Prog Photovoltaics 16 (7), (2008), 561-576, https://doi.org/10.1002/pip.836
M. Niggemann, B. Zimmermann, J. Haschke, M. Glatthaar, A. Gombert
Organic Solar Cell Modules for Specific Applications - From Energy Autonomous Systems to Large Area Photovoltaics
Sol. Energy Mater Sol. Cells 516 (20), (2008), 7181-7187, https://doi.org/10.1016/j.tsf.2007.12.093
C. Siegers, U. Würfel, M. Zistler, H. Gores, J. Hohl-Ebinger, A. Hinsch, R. Haag
Overcoming Kinetic Limitations of Electron Injection in the Dye Solar Cell via Coadsorption and FRET
ChemPhsychem 9 (5), (2008), 793-798, https://doi.org/10.1002/cphc.200700864
A. Hinsch, S.Behrens, M. Berginc, H. Bönnemann, H. Brandt, A. Drewitz, F. Einsele, D. Faßler, D. Gerhard, H. Gores, R. Haag, T. Herzig, S. Himmler, G. Khelashvili, D. Koch, G. Nazmutdinova, U. Opara Krasovec, P. Putyra, U. Rau, R. Sastrawan, T. Schauer, C. Schreiner, S. Sensfuss, C. Siegers, K. Skupien, P. Wachter, J. Walter, P. Wasserscheid, U. Würfel, M. Zistler
Material Development for Dye Solar Modules: Results from an Integrated Approach
Prog Photovoltaics 16 (6), (2008), 489-501, https://doi.org/10.1002/pip.832
2007
C. Siegers, U. Würfel, B. Zimmermann, J. Hohl-Ebinger, R. Mülhaupt, A. Hinsch, R. Haag
A Dyadic Sensitizer for Dye Solar Cells with High Energy-Transfer Efficiency in the Device
ChemPhsychem 8 (10), (2007), 1548-1556, https://doi.org/10.1002/cphc.200700170
B. Zimmermann, M. Glatthaar, M. Niggemann, M. K. Riede, A. Hinsch, A. Gombert
ITO-free Wrap through Organic Solar Cells - A Module Concept for Cost-Efficient Reel-To-Reel Production
Sol. Energy Mater Sol. Cells 91 (5), (2007), 374-378, https://doi.org/10.1016/j.solmat.2006.10.005
J. M. Kroon, N. J. Bakker, H. J. P. Smit, P. Liska, K. R. Thampi, P. Wang, S. M. Zakeeruddin, M. Grätzel, A. Hinsch, S. Hore, U. Würfel, R. Sastrawan, J.R. Durrant, E. Palomares, H. Pettersson, T. Gruszecki, J. Walter, K. Skupien, G.E. Tulloch
Nanocrystalline Dye-Sensitized Solar Cells Having Maximum Performance
Prog Photovoltaics 15 (1), (2007), 1-18, https://doi.org/10.1002/pip.707
M. Glatthaar, M. Niggemann, B. Zimmermann, N. Keegan, K. Sylvester-Hvid, A. Hinsch, A. Gombert
Efficiency Limiting Factors of Organic Bulk Heterojunction Solar Cells Iidentified by Electrical Impedance Spectroscopy
Sol. Energy Mater Sol. Cells 91 (5), (2007), 390-393, https://doi.org/10.1016/j.solmat.2006.10.020
2006
M. Niggemann, T. Ziegler, M. Glatthaar, M. Riede, B. Zimmermann, A. Gombert
Optical Near Field Phenemena in Planar and structured Organic Solar Cells
Proc. SPIE 6197, Photonics for Solar Energy Systems, 61970D (2006), https://doi.org/10.1117/12.662063
M. Glatthaar, M. Niggemann, B. Zimmermann, M.K. Riede, T. Ziegler, A. Gombert
Organic Solar Cells with Inverted Layer sequence Incorporating Optical Spacers - Simulation and Experiment
Proc. SPIE 6197, Photonics for Solar Energy Systems, 61970G (2006), https://doi.org/10.1117/12.662530
K. Lobato, L.M. Peter, U. Würfel
Direct Measurement of the Internal Electron Quasi-Fermi Level in Dye Sensitized Solar Cells Using a Titanium Secondary Electrode
J. Phys. Chem. B, 110 (33), 2006, 16201–16204, https://doi.org/10.1021/jp063919z
2005
M. Glatthaar, M. Niggemann, B. Zimmermann, P. Lewer, M. Riede, A. Hinsch, J. Luther
Organic Solar Cells Using Inverted Layer Sequence
Sol. Energ
2018
U. Würfel, M. Unmüssig
Apparent Field‐Dependence of the Charge Carrier Generation in Organic Solar Cells as a Result of (Bimolecular) Recombination
Solar RRL, 2018, 1800229, https://doi.org/10.1002/solr.201800229
M. List, T. Sarkar, P. Perkhun, J. Ackermann, C. Luo, U. Würfel
Correct Determination of Charge Transfer State Energy from Luminescence Spectra in Organic Solar Cells
Nat. Commun, 9 (2018), 3631, https://doi.org/10.1038/s41467-018-05987-8
M. Kohlstädt, M. A. Yakoob, U. Würfel
A Matter of Drying: Blade-Coating of Lead Acetate Sourced Planar Invereted Perovskite Solar Cells on Active Areas > 1 cm²
Phys. Status Solidi A (2018), 1800419, https://doi.org/10.1002/pssa.201800419
2017
L. Wagner, L. E. Mundt, G. Mathiazhagan, M. Mundus, M. C. Schubert, S. Mastroianni, U. Würfel, A. Hinsch, S. W. Glunz
Distinguishing Crystallization Stages and Their Influence on Quantum Efficiency uring Perovskite Solar Cell Formation in Real-time
Scientific Reports 7 (2017), https://doi.org/10.1038/s41598-017-13855-6
P. Schulze, A. C. Bett, K. Winkler, A. Hinsch, S. Lee, S. Mastroianni, L. E. Mundt, M. Mundus, U. Würfel, S. W. Glunz, M. Hermle, J. C. Goldschmidt
Novel Low-Temperature Process for Perovskite Solar Cells with a Mesoporous TiO2 Scaffold
ACS Appl. Mater. Interfaces 9 (36), (2017), 30567–30574, https://doi.org/10.1021/acsami.7b05718
M. Mundus, B. Venkataramanachar, R. Gehlhaar, M. Kohlstädt, B. Niesen, W. Qiu, J. P. Herterich, F. Sahli, M. Bräuninger, J. Werner, J. Hohl-Ebinger, G. Uytterhoeven, U. Würfel, C. Ballif, M. Schubert, W. Warta, S. W.
Glunz
Spectrally Resolved Nonlinearity and Temperature Dependence of Perovskite Solar Cells
Sol. Energy Mater Sol. Cells 172 (2017), 66–73, https://doi.org/10.1016/j.solmat.2017.07.013
A. Raba, A., Y. Leroy, M. Kohlstädt, U. Würfel, A.-S. Cordan
Organic Solar Cells: Extraction of Physical Parameters by Means of Markov Chain Monte Carlo Techniques
IEEE J. Photovolt. 7 (4), (2017), 1098-1104, https://doi.org/10.1109/JPHOTOV.2017.2690876
A. V. Akkuratov, S. Mühlbach, D.K. Susarova, M. Seßler, B. Zimmermann, V. F. Razumov, U. Würfel, P. A. Troshin
Positive Side of Disorder: Statistical Fluorene-Carbazole-TTBTBTT Terpolymers Show Improved Optoelectronic and Photovoltaic Properties Compared to the Regioregular Structures
Sol. Energy Mater Sol. Cells 160 (2017), 346-354, https://doi.org/10.1016/j.solmat.2016.10.039
A. Spies, M. List, T. Sarkar, U. Würfel
On the Impact of Contact Selectivity and Charge Transport on the Open‐Circuit Voltage of Organic Solar Cells
2016
E. Zimmermann, K. K. Wong, M. Müller, H. Hu, P. Ehrenreich, M. Kohlstädt, U. Würfel, S. Mastroianni, G. Mathiazhagan, A. Hinsch, T P. Gujar, M. Thelakkat, T. Pfadler, L. Schmidt-Mende
Characterization of Perovskite Solar Cells: towards a Reliable Measurement Protocol
APL Materials 4 (2016), 091901, https://doi.org/10.1063/1.4960759
U. Würfel, M. Seßler, M. Unmüssig, N. Hofmann, M. List, E. Mankel, T. Mayer, G. Reiter, J.-L. Bubendorff, L. Simon, M. Kohlstädt
How Molecules with Dipole Moments Enhance the Selectivity of Electrodes in Organic Solar Cells – A Combined Experimental and Theoretical Approach
Adv. Energy Mater. 6 (19), (2016), 1600594, https://doi.org/10.1002/aenm.201600594
S. Röttinger, B. Schwarz, S. Schäfer, R. Gauch, B. Zimmermann, U. Würfel
Laser Patterning of Vacuum Processed Small Molecular Weight Organic Photovoltaics
Sol. Energy Mater Sol. Cells 154 (2016), 35-41, https://doi.org/10.1016/j.solmat.2016.04.032
C. Owens, G. M. Ferguson, M. Hermenau, E. Voroshazi, Y. Galagan, B. Zimmermann, R. Rösch, D. Angmo, G. Teran-Escobar, C. Uhrich, R. Andriessen, H. Hoppe, U. Würfel, M. Lira-Cantu, F. C. Krebs, D. M. Tanenbaum
Comparative Indoor and Outdoor Degradation of Organic Photovoltaic Cells via Inter-laboratory Collaboration
Polymers 8 (1), 2016, 1-8, https://doi.org/10.3390/polym8010001
2015
S. Mastroianni, F. D. Heinz, J.-H. Im, W. Veurman, M. Padilla, M. C. Schubert, U. Würfel, M. Grätzel, N.-G. Park, A. Hinsch
Analysing the Effect of Crystal Size and Structure in Highly Efficient CH3NH3PbI3 Perovskite Solar Cells by Spatially Resolved Photo- and Electroluminescence Imaging
Nanoscale 7 (46), (2015), 19653-19662, https://doi.org/10.1039/c5nr05308k
U. Würfel, A. Cuevas, P. Würfel
Charge Carrier Separation in Solar Cells
IEEE J. Photovolt. 5 (1), (2015), 461-469, https://doi.org/10.1109/JPHOTOV.2014.2363550
U .Würfel, D. Neher, A. Spies, S. Albrecht
Nat. Commun. 6 (2015), 6951, https://doi.org/10.1038/ncomms7951
R. Steim, P. Chabrecek, U. Sonderegger, B. Kindle-Hasse, W. Siefert, T. Kroyer, P. Reinecke, T. Lanz, T. Geiger, R. Hany, F. Nüesch
Laminated Fabric as Top Electrode for Organic Photovoltaics
Appl. Phys. Lett. 106 (2015), 193301, https://doi.org/10.1063/1.4919940
D. Kaduwal, H. F. Schleiermacher, J. Schulz-Gericke, S. Schiefer, J. Zhang, B Zimmermann
Layout Flexibility for Sheet-to-Sheet Produced Flexible ITO-free Organic Solar Modules with Organic Functional
Slot Die Coated under Ambient Atmospheric
Sol. Energy Mater Sol. Cells 136 (2015), 200-205, https://doi.org/10.1016/j.solmat.2014.11.043
J. Reinhardt, P. Apilo, B. Zimmermann, S. Rousu, U. Würfel
Determining the Photocurrent of Individual Cells within an Organic Solar Module by LBIC and the Filtering Approach: Experiments and Simulations
Sol. Energy Mater Sol. Cells 134 (2015), 157-164, https://doi.org/10.1016/j.solmat.2014.11.032
2014
S. B. Sapkota, A. Spies, B. Zimmermann, I. Dürr, U. Würfel
Promising Long-Term Stability of Encapsulated ITO-Free Bulk-Heterojunction Organic Solar Cells under Different Aging Conditions
Sol. Energy Mater Sol. Cells 130 (2014), 144-150, https://doi.org/10.1016/j.solmat.2014.07.004
B. Arredondo, B. Romero, G. DelPozo, M. Sessler, C. Veit, U. Würfel
Impedance Spectroscopy Analysis of Small Molecule Solution Processed Organic Solar Cells
Sol. Energy Mater Sol. Cells 128 (2014), 351-356, https://doi.org/10.1016/j.solmat.2014.05.050
M. Sessler, A. Saeed, M. Kohlstädt, U. Würfel
Systematic Variation of the Stabilizer to Reduce The Annealing Temperature of Sol-Gelderived Titanium Oxide in Inverted Organic Solar Cells
Org. Electron. 15 (7), (2014), 1407-1412, https://doi.org/10.1016/j.orgel.2014.04.012
J. Reinhardt, M. Grein, C. Bühler, M. Schubert, U. Würfel
Identifying the Impact of Surface Recombination at Electrodes in Organic Solar Cells by Means of Electroluminescence and Modeling
Adv. Energy Mater. 4 (11), (2014), 1400081, https://doi.org/10.1002/aenm.201400081
D. Kaduwal, H. F. Schleiermacher, J. Schulz-Gericke, T. Kroyer, B. Zimmermann, U. Würfel
ITO-free Organic Solar Cells with Roll-to-Roll Coated Organic Functional Layers from Non-halogenated Solvents
Sol. Energy Mater Sol. Cells 124 (2014), 92-97, https://doi.org/10.1016/j.solmat.2014.02.001
H. Ahme, M. Lee, C. Im, U. Würfel
Influence of the Acceptor on Electrical Performance and Charge Carrier Transport in Bulk Heterojunction Solar Cells With HXS-1
J. Phys. Chem. C 118 (7), (2014), 3386–3392, https://doi.org/10.1021/jp408705r
S. Schiefer, B. Zimmermann, U. Würfel
Determination of the Intrinsic and the Injection Dependent Charge Carrier Density in Organic Solar Cells Using the Suns-Voc Method
J. Appl. Phys. 115 (2014), 044506, https://doi.org/10.1063/1.4862960
S. Schiefer, B. Zimmermann, S. W. Glunz, U. Würfel
Applicability of the Suns-VOC Method on Organic Solar Cells
IEEE J. Photovolt. 4 (1), (2014), 271-277, https://doi.org/10.1109/JPHOTOV.2013.2288527
S. B. Sapkota, M. Fischer, B. Zimmermann, U. Würfel
Analysis of the Degradation Mechanism of ITO-Free Organic Solar Cells under UV Radiation
Sol. Energy Mater Sol. Cells 121 (2014), 43-48, https://doi.org/10.1016/j.solmat.2013.10.021
D. Kaduwal, B. Zimmermann, U. Würfel
ITO-Free Laminated Concept for Flexible Organic Solar Cells
Sol. Energy Mater Sol. Cells 120, Part B, (2014), 449-453, https://doi.org/10.1016/j.solmat.2013.09.024
2013
R. Hanfland, M. A. Fischer, W. Brüttling, U. Würfel, R. C. I. Mackenzie
The Physical Meaning of Charge Extraction by Linearly Increasing Voltage Transients from Organic Solar Cells
Appl. Phys. Lett. 103 (2013), 063904, https://doi.org/10.1063/1.4818267
M. Kohlstädt, M. Grein, P. Reinecke, T. Kroyer, B. Zimmermann, U. Würfel
Inverted ITO- And PEDOT:PSS-Free Polymer Solar Cells with High Power Conversion Efficiency
Sol. Energy Mater Sol. Cells 113 (2013), 98-102, https://doi.org/10.1016/j.solmat.2013.05.023
B. Arredondo, C. D. Dios, R. Vergaz, A. R. Criado, B. Romero, B Zimmermann, U. Würfel
Performance of ITO-Free Inverted Organic Bulk Heterojunction Photodetectors: Comparison with Standard Device Architecture
Org. Electron. 14 (10), (2013), 2484-2490, https://doi.org/10.1016/j.orgel.2013.06.018
S. Schiefer, B. Zimmermann, U. Würfel
Layout Optimization of Organic Wrap Through Solar Cells by Combined Electrical and Optical Modeling
Sol. Energy Mater Sol. Cells 115 (2013), 29-35, https://doi.org/10.1016/j.solmat.2013.03.018
S. Shao, J. Liu, J Bergqvist, S: Shi, C: Veit, U. Würfel, Z. Xie, F. Zhang
In Situ Formation of Moo3 in PEDOT:PSS Matrix: A Facile Way to Produce a Smooth and Less Hygroscopic
Hole Transport Layer for Highly Stable Polymer Bulk Heterojunction Solar Cell
Adv. Energy Mater. 3 (3), (2013), 349-355, https://doi.org/10.1002/aenm.201200609
F. Stelzl, J. Schulz-Gericke, M. Niggemann, U. Würfel
High Yield Fabrication of Vertical Interdigital Electrodes with Sub Micrometer Distance and their Application in an Organic Photovoltaic Device
Org. Electron. 14 (2), (2013), 535-541, https://doi.org/10.1016/j.orgel.2012.11.022
2012
P. Kopola, B. Zimmerman, A. Filipovic, H.F. Schleiermacher, J. Greulich, S. Rousu, J. Hast, R. Myllyla, U. Würfel
Aerosol Jet Printed Grid for ITO-free Inverted Organic Solar Cells
Sol. Energy Mater Sol. Cells 107 (2012), 252-258, https://doi.org/10.1016/j.solmat.2012.06.042
R. Rösch, D. M. Tanenbaum, M. Jorgensen, M. Seeland, M. Bärenklau, M. Hermenau, E. Voroshazi, M. T. Lloyd, Y. Galagan, B. Zimmermann, U. Würfel, M. Hösel, H. F. Dam, S. A. Gevorgyan, S. Kudret, W. Maes, L. Lutsen, D. Vanderzande, R. Andriessen, G. Teran-Escobar, M. Lira-Cantu, A. Rivato, G.Y. Uzunolu, D. Germack, B. Andreasen, M. V. Madsen, K. Norman, H. Hoppe, F. C. Krebs
Investigation of the Degradation Mechanisms of Variety of Organic Photovoltaic Devices by Combination of Imaging Techniques- The ISOS-3 Inter-laboratory Collaboration
Energy Environ. Sci. 5 (2012), 6521-6540, https://doi.org/10.1039/C2EE03508A
G. Teran-Escobar, D. M. Tanenbaum, E. Voroshazi, M. Hermenau, K. Norrman, M. T. Lloyd, Y. Galagan, B. Zimmermann, M. Hösel, H. F. Dam, M. Jørgensen, S. Gevorgyan, S. Kudret, W. Maes, L. Lutsen, D. Vanderzande, U. Würfel, R. Andriessen, R. Rösch, H. Hoppe, A. Rivaton, G. Y. Uzunoğlu, D. Germack, B. Andreasen, M. V. Madsen, E. Bundgaard, F. C. Krebs, M. Lira-Cantu
On the Stability of a Variety of Organic Photovoltaic Devices by IPCE and In Situ IPCE Analyses – the ISOS-3 Inter-laboratory Collaboration
Phys. Chem. Chem. Phys. 14 (2012), 11824-11845, https://doi.org/10.1039/C2CP40821J
D. M. Tanenbaum, M. Hermenau, E. Voroshazi, M. T. Lloyd, Y. Galagan, B. Zimmermann, M. Hösel, H. F. Dam, S. A. Gevorgyan, S. Kudret, W. Maes, L. Lutsen, D. Vanderzande, U. Würfel, R. Andriessen, G. Teran-Escobar, M. Lira-Cantu, A. Rivato, G. Y. Uzunolu, D. Germack, B. Andreasen, M. V. Madsen, K. Norman, H. Hoppe, F. C. Krebs
The ISOS-3 Inter-laboratory Collaboration Focused on the Stability of a Variety of Organic photovoltaic devices
RSC Adv., 2 (2012), 882-893, https://doi.org/10.1039/C1RA00686J
T. Richter, C. Braun, S. Link, M. Scheuble, J.W. Crossland, F.F. Stelzl, U. Würfel, S. Ludwigs
Regioregular Polythiophenes with Alkyilthiophene Side Chains
Macromolecules, 45 (14), (2012), 5782–5788, https://doi.org/10.1021/ma2026644
F. F. Stelzl, U. Würfel
Modeling the Influence of Doping on the Performance of Bulk Heterojunction Organic Solar Cells: One-dimensional Effective Semiconductor Versus Two-dimensional Donor/Acceptor Model
Phys. Rev. B 86 (7), (2012), 075315, https://doi.org/10.1103/PhysRevB.86.075315
H. S. Mangold, T. V. Richter, S. Link, U. Würfel, S. Ludwigs
Optoelectronic Properties of Hyperbranched Polythiophenes
J. Phys. Chem. B, 116 (1), (2012), 154–159, https://doi.org/10.1021/jp210822s
R. R. Sondergaard, T. Makris, P. Lianos, A. Manor, E. A. Katz, W. W. Gong, S. M. Tuladhar, J. Nelson, R. Tuomi, P. Sommerling, S. C. Veenstra, A. Rivaton, A. Dupuis, G. Teran-Escobar, M. Lira-Cantu, S. B. Sapkota, B. Zimmermann, U. Würfel, A. Matzarakis, F. C. Krebs
The Use of Polyurethane as Encapsulating Method for Polymer Solar Cells - An Inter-laboratory Study on Outdoor Stability in 8 Countries
Sol. Energy Mater Sol. Cells 99 (2012), 292-300, https://doi.org/10.1016/j.solmat.2011.12.013
Y. Galagan, B. Zimmermann, E.W. Coenen, M. Jorgensen, D. Tanenbaum, F. C. Krebs, H. Gorter, S. Sabik, L. Slooff, S. Veenstra, J. M. Kroon, R. Andriessen
Current Collecting Grids for ITO-Free Solar Cells
Adv. Energy Mater. 2 (1), (2012), 103-110, https://doi.org/10.1002/aenm.201100552
Y. Galagan, B. Zimmermann, E. W. Coenen, M. Jorgensen, D. Tanenbaum, F.C. Krebs, H. Gorter, S. Sabik, L. Slooff, S. Veenstra, J. M. Kroon, R. Andriessen
Organic Solar Cells: Current Collecting for ITO-Free Solar Cells
Adv. Energy Mater. 2 (1), (2012), 169-169, https://doi.org/10.1002/aenm.201290005
F. F. Stelzl, U. Würfel, J. Schulz-Gericke, E. Crossland, S. Ludwigs
Voltage-induced Formation of Accumulation Layers at Electrode Interfaces in Organic Solar Cells
Adv. Energy Mater. 2 (8), (2012), 983-991, https://doi.org/10.1002/aenm.201100569
2011
C. Du, C. Li, W. Li, X. Chen, Z. Bo, C. Veit, Z. Ma, U. Würfel, H. Zhu, W. Hu, F. Zhang
9-Alkylidene-9 H-Fluorene-Containing Polymer for High-Efficiency Polymer Solar Cells
Molecules, 44 (19), (2011), 7617–7624, https://doi.org/10.1021/ma201477b
W. Li, Y. Zhou, V. B. Andersson, M. L. Andersson, Y. Thomann, C. Veit, K. Tvingstedt, R. Quin, Z. Bo, O. Inganas, U. Würfel, F. Zhang
The Effect of Additive on Performance and Shelf-stability of HSX-1/PCBM photovoltaic devices
Org. Electron. 12 (9), (2011), 1544-1551, https://doi.org/10.1016/j.orgel.2011.05.028
Y. Zhou, M. Eck, C. Veit, B .Zimmermann, F. Rauscher, P. Niyamakom, S. Yilmaz, I. Dumsch, S .Allard, U. Scherf, M. Krüger
Efficiency Enhancement for Bulk-Heterojunction Hybrid Solar Cells Based on Acid Treated CdSe Quantum Dots and Low Bandgap Polymer PCPDTBT
Sol. Energy Mater Sol. Cells 95 (4), (2011), 1232-1237, https://doi.org/10.1016/j.solmat.2010.12.041
B. V. Andersson, U. Würfel, O. Inganas
Full Day Modelling of V-shaped Organic Solar Cell
Sol Energy 85 (6), (2011), 1257-1263, https://doi.org/10.1016/j.solener.2010.10.017
S. Schäfer, A. Petersen, T. A. Wagner, R. Kniprath, D. Lingenfelser, A. Zen, T. Kirchartz, B. Zimmermann, U. Würfel, X. Feng, T. Mayer
Influence of the Indium Tin Oxide/Organic Interface on Open-Circuit Voltage, Recombination, and Cell Degradation in Organic Small-Molecule Solar Cells
Phys. Rev. B 83 (16), (2011), 165311, https://doi.org/10.1103/PhysRevB.83.165311
S. A. Gevorgyan, A. J. Medford, E. Bundgaard, S.B. Sapkota, H. F. Schleiermacher, B. Zimmermann, U .Würfel, A. Chafiq, M. Lira-Cantu, T. Swonke, M. Wagner, C.J. Brabec, O. Haillant, E. Voroshazi, T. Aernouts, R. Steim, J.A. Hauch, A. Elschner, M. Pannone, M. Xiao, A. Langzettel, D. Laird, M.T. Lloyd, T. Rath, E. Maier, G. Trimmel, M. Hermenau, T. Menke, K. Leo, R. Rösch, M. Seeland, H. Hoppe, T.J. Nagle, K.B. Burke, C.J. Fell, D. Vak, T.B. Singh, S.E. Watkins, Y. Galagen, A. Manor, E. A. Katz, T. Kim, K. Kim, P.M. Sommeling, WJ.H. Verhees, S. C. Veenstra, M. Riede, M. Greyson Christoforo, T. Currier, V. Shrotriya, G. Schwartz, F. C. Krebs
An Inter-Laboratory Stability Study of Roll-to-Roll Coated Flexible Polymer Solar Modules
Sol. Energy Mater Sol. Cells 95 (5), (2011), 1398-1416, https://doi.org/10.1016/j.solmat.2011.01.010
B. Zimmermann, H. F. Schleiermacher, M. Niggemann, U. Würfel
ITO-free Flexible Inverted Organic Solar Cell Modules with High Fill Factor Prepared by Slot Die Coating
Sol. Energy Mater Sol. Cells 95 (7), (2011), 1587-1589, https://doi.org/10.1016/j.solmat.2010.11.025
L. M. Anderson, U. Würfel, O. Inganas, C. Müller, B. H. Badada, F. Zhang
Mobility and Fill Factor Correlation in Geminate Recombination Limited Solar Cells
J. Appl. Phys. 110, (2011), 024509, https://doi.org/10.1063/1.3609079
2010
Y. Zhou, F. Riehle, Y. Yuan, H.F. Schleiermacher, M. Niggemann, G. Urban, M. Krüger
Improved Efficiency of Hybrid Solar Cells Based on Non-Ligand-Exchanged CdSe Quantum Dots and Poly (3-hexylthiophene)
Appl. Phys. Lett. 96, (2010), 013304, https://doi.org/10.1063/1.3280370
T. V. Richter, F. F. Stelzl, J. Schulz-Gericke, B. Kerscher, U. Würfel, M. Niggemann, S. Ludwigs
Room Temperature Vacuum-Induced Ligand Removal and Patterning of ZnO Nanoparticles: from Semiconducting Films towards Printed Electronics
J. Mater. Chem. 20. (2010), 874-879, https://doi.org/10.1039/B916778C
2009
K. Skupien, P .Putyra, J. Walter, R. H. Kozlowski, G. Khelashvili, A. Hinsch, U. Würfel
Catalytic Materials Manufactured by the Polyol Process for Monolithic Dye-Sensitized Solar Cells
Prog Photovoltaics 17 (1), (2009), 67-73, https://doi.org/10.1002/pip.854
C. Siegers, B. Olah, U. Würfel, J. Hohl-Ebinger, A. Hinsch, R. Haag
Donor-Acceptor-Functionalized Polymers for Efficient Light Harvesting in the Dye Solar Cell
Sol. Energy Mater Sol. Cells 93 (5), (2009), 552-563, https://doi.org/10.1016/j.solmat.2008.11.038
M. Niggemann, U. Würfel, B. Zimmermann, W. Platzer
Energy from the Environment-Organic Solar Cells
Kunststoffe International 99 (4), (2009), 46-51
B. Zimmermann, U. Würfel, M. Niggemann
Longterm Stability of Efficient Inverted P3HT:PCCBM Solar Cells
Sol. Energy Mater Sol. Cells 93 (4), (2009), 491-496, https://doi.org/10.1016/j.solmat.2008.12.022
A. Hinsch, H. Brandt, W. Veurman, S. Hemming, M. Nittel, U. Würfel, P. Putyra, C. Lang-Koetz, M. Stabe, S. Beucker, K. Fichter
Dye Solar Modules for Facade Applications: Recent Results from Project ColorSol
Sol. Energy Mater Sol. Cells 93 (6-7), (2009), 820-824, https://doi.org/10.1016/j.solmat.2008.09.049
R. Qin, W. Li, C. Li, C. Du, C. Veit, H .F. Schleiermacher, M. Anderson, Z. Bo, Z. Liu, O. Inganas, U. Würfel, F. Zhang
A Planar Copolymer for High Efficiency Polymer Solar Cells
J. Am. Chem. Soc.,131 (41), (2009), 14612–14613, https://doi.org/10.1021/ja9057986
F. C. Krebs, S. A. Gevorgyan, B. Gholamkhass, S. Holdcroft, C. Schlenker, M. E. Thompson, B. C. Thompson, D. Olson, D. S. Ginley, S. E. Shaheen, H. N. Alshareef, J. W. Murphy, W. J. Youngblood, N. C. Heston, J. R. Reynolds, S. Jia, D. Laird, S. M. Tuladhar, J. G. A. Dane, P. Atienzar, J. Nelson, J. M. Kroon, M. M. Wienk, R. A .J. Janssen, K. Tvingstedt, F. Zhang, M. Andersson, O. Inganäs, M. Lira-Cantu, R. D. Bettignies, S. Guillerez, T. Aernouts, D. Cheyns, L. Lutsen, B. Zimmermann, U. Würfel, M. Niggemann, H. F. Schleiermacher, P. Liska, M. Grätzel, P. Lianos, E. A. Katz, W. Lohwasser, B. Jannon
A Round Robin Study of Flexible Large-Area Roll-To-Roll Processed Polymer Solar Cell Modules
Sol. Energy Mater Sol. Cells 93 (11), (2009), 820-824, https://doi.org/10.1016/j.solmat.2009.07.015
S. Janietz, H. Krügger, H.F. Schleiermacher, U. Würfel, M. Niggemann
Tailoring of Low Bandgap Polymer and its Performance Analysis in Organic Solar Cells
Macromol. Chem. Phys. 210 (18), (2009), 1493-1503, https://doi.org/10.1002/macp.200900133
2008
U. Würfel, M. Peters, A. Hinsch
Detailed Experimental and Theoretical Investigation of the Electron Transport in a Dye Solar Cell by Means of a Three-Electrode Configuration
J. Phys. Chem. C, 112 (5), (2008), 1711–1720, https://doi.org/10.1021/jp077016x
M. Riede, K. Sylvester-Hvid, M. Glatthaar, M. Niggemann, B. Zimmermann, N. Keegan, A. Liehr, T. Ziegler, G. Willeke, A. Gombert
High Throughput Testing Platform for Organic Solar Cells
Prog Photovoltaics 16 (7), (2008), 561-576, https://doi.org/10.1002/pip.836
M. Niggemann, B. Zimmermann, J. Haschke, M. Glatthaar, A. Gombert
Organic Solar Cell Modules for Specific Applications - From Energy Autonomous Systems to Large Area Photovoltaics
Sol. Energy Mater Sol. Cells 516 (20), (2008), 7181-7187, https://doi.org/10.1016/j.tsf.2007.12.093
C. Siegers, U. Würfel, M. Zistler, H. Gores, J. Hohl-Ebinger, A. Hinsch, R. Haag
Overcoming Kinetic Limitations of Electron Injection in the Dye Solar Cell via Coadsorption and FRET
ChemPhsychem 9 (5), (2008), 793-798, https://doi.org/10.1002/cphc.200700864
A. Hinsch, S.Behrens, M. Berginc, H. Bönnemann, H. Brandt, A. Drewitz, F. Einsele, D. Faßler, D. Gerhard, H. Gores, R. Haag, T. Herzig, S. Himmler, G. Khelashvili, D. Koch, G. Nazmutdinova, U. Opara Krasovec, P. Putyra, U. Rau, R. Sastrawan, T. Schauer, C. Schreiner, S. Sensfuss, C. Siegers, K. Skupien, P. Wachter, J. Walter, P. Wasserscheid, U. Würfel, M. Zistler
Material Development for Dye Solar Modules: Results from an Integrated Approach
Prog Photovoltaics 16 (6), (2008), 489-501, https://doi.org/10.1002/pip.832
2007
C. Siegers, U. Würfel, B. Zimmermann, J. Hohl-Ebinger, R. Mülhaupt, A. Hinsch, R. Haag
A Dyadic Sensitizer for Dye Solar Cells with High Energy-Transfer Efficiency in the Device
ChemPhsychem 8 (10), (2007), 1548-1556, https://doi.org/10.1002/cphc.200700170
B. Zimmermann, M. Glatthaar, M. Niggemann, M. K. Riede, A. Hinsch, A. Gombert
ITO-free Wrap through Organic Solar Cells - A Module Concept for Cost-Efficient Reel-To-Reel Production
Sol. Energy Mater Sol. Cells 91 (5), (2007), 374-378, https://doi.org/10.1016/j.solmat.2006.10.005
J. M. Kroon, N. J. Bakker, H. J. P. Smit, P. Liska, K. R. Thampi, P. Wang, S. M. Zakeeruddin, M. Grätzel, A. Hinsch, S. Hore, U. Würfel, R. Sastrawan, J.R. Durrant, E. Palomares, H. Pettersson, T. Gruszecki, J. Walter, K. Skupien, G.E. Tulloch
Nanocrystalline Dye-Sensitized Solar Cells Having Maximum Performance
Prog Photovoltaics 15 (1), (2007), 1-18, https://doi.org/10.1002/pip.707
M. Glatthaar, M. Niggemann, B. Zimmermann, N. Keegan, K. Sylvester-Hvid, A. Hinsch, A. Gombert
Efficiency Limiting Factors of Organic Bulk Heterojunction Solar Cells Iidentified by Electrical Impedance Spectroscopy
Sol. Energy Mater Sol. Cells 91 (5), (2007), 390-393, https://doi.org/10.1016/j.solmat.2006.10.020
2006
M. Niggemann, T. Ziegler, M. Glatthaar, M. Riede, B. Zimmermann, A. Gombert
Optical Near Field Phenemena in Planar and structured Organic Solar Cells
Proc. SPIE 6197, Photonics for Solar Energy Systems, 61970D (2006), https://doi.org/10.1117/12.662063
M. Glatthaar, M. Niggemann, B. Zimmermann, M.K. Riede, T. Ziegler, A. Gombert
Organic Solar Cells with Inverted Layer sequence Incorporating Optical Spacers - Simulation and Experiment
Proc. SPIE 6197, Photonics for Solar Energy Systems, 61970G (2006), https://doi.org/10.1117/12.662530
K. Lobato, L.M. Peter, U. Würfel
Direct Measurement of the Internal Electron Quasi-Fermi Level in Dye Sensitized Solar Cells Using a Titanium Secondary Electrode
J. Phys. Chem. B, 110 (33), 2006, 16201–16204, https://doi.org/10.1021/jp063919z
2005
M. Glatthaar, M. Niggemann, B. Zimmermann, P. Lewer, M. Riede, A. Hinsch, J. Luther
Organic Solar Cells Using Inverted Layer Sequence
Sol. Energy Mater Sol. Cells 491 (1-2), (2005), 298-300, https://doi.org/10.1016/j.tsf.2005.06.006
M. Glatthaar, M. Niggemann, B. Zimmermann, T. Ziegler, R. Kern, A. Hinsch, A. Gombert
Impedance Spectroscopy on Organic Bulk-Heterojunction Solar Cells
Phys Status Solidi, 202 (11), (2005), https://doi.org/10.1002/pssa.200521149
U. Würfel, J. Wagner, A. Hinsch
Spatial Electron Distribution and Ist Origin in the Nanoporous TiO2 Network of a Dye Solar Cell
J. Phys. Chem. B, 109 (43), (2005), 20444–20448, https://doi.org/10.1021/jp0529624
M. Niggemann, D. Ruf, B. Blaesi, M. Glatthaar, M. Riede, C. Mueller, B. Zimmermann, A. Gombert
Functional Substrates for Flexible Organic Photovoltaic Cells
Proc. SPIE 5938, Organic Photovoltaics VI, 593802 (2005), https://doi.org/10.1117/12.617196
B. Zimmermann, M. Niggemann, M. Riede, A. Hinsch
Electroabsorption Studies of Organic Bulk-Heterojunction Solar Cells
Sol. Energy Mater Sol. Cells 493 (1-2), (2005), 170-174, https://doi.org/10.1016/j.tsf.2005.04.089
y Mater Sol. Cells 491 (1-2), (2005), 298-300, https://doi.org/10.1016/j.tsf.2005.06.006
M. Glatthaar, M. Niggemann, B. Zimmermann, T. Ziegler, R. Kern, A. Hinsch, A. Gombert
Impedance Spectroscopy on Organic Bulk-Heterojunction Solar Cells
Phys Status Solidi, 202 (11), (2005), https://doi.org/10.1002/pssa.200521149
U. Würfel, J. Wagner, A. Hinsch
Spatial Electron Distribution and Ist Origin in the Nanoporous TiO2 Network of a Dye Solar Cell
J. Phys. Chem. B, 109 (43), (2005), 20444–20448, https://doi.org/10.1021/jp0529624
M. Niggemann, D. Ruf, B. Blaesi, M. Glatthaar, M. Riede, C. Mueller, B. Zimmermann, A. Gombert
Functional Substrates for Flexible Organic Photovoltaic Cells
Proc. SPIE 5938, Organic Photovoltaics VI, 593802 (2005), https://doi.org/10.1117/12.617196
B. Zimmermann, M. Niggemann, M. Riede, A. Hinsch
Electroabsorption Studies of Organic Bulk-Heterojunction Solar Cells
Sol. Energy Mater Sol. Cells 493 (1-2), (2005), 170-174, https://doi.org/10.1016/j.tsf.2005.04.089