| Year | Title/Author | Document Type |
| 2021 | A 1 cm2 Organic Solar Cell with 15.2% Certified Efficiency. Detailed Characterization and Identification of Optimization Potential
Würfel, U.; Herterich, J.; List, M.; Faisst, J.; Bhuyian, F.M.; Schleiermacher, H.-F.; Knupfer, K.T.; Zimmermann, B. | Journal Article
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| 2021 | Ion Movement Explains Huge Voc Increase despite Almost Unchanged Internal Quasi-Fermi-Level Splitting in Planar Perovskite Solar Cells
Herterich, J.; Unmüssig, M.; Loukeris, G.; Kohlstädt, M.; Würfel, U. | Journal Article
|
| 2021 | ITO-Free Inverted OPV Modules from Non-Halogenated Solvents for Powering IoT Devices with Low Artificial Indoor Light: Presentation held at nanoGe Fall Meeting, Online, Germany, October 18th to 22nd, 2021
Müller, D.; Campos Guzmán, L.; Jiang, E.; Zimermann, B.; Würfel, U. | Presentation |
| 2021 | Quantifying Losses of Perovskite Solar Cells with Carbon-based Back-contacts and Outlining a Roadmap on Boosting their Power Conversion Efficiencies
Bogachuk, D.; Yang, B.; Suo, J.; Martineau, D.; Verma, A.; Narbey, S.; Anaya, M.; Frohna, K.; Müller, D.; Doherty, T.; Zouhair, S.; Herterich, J.; Wagner, L.; Hagfeldt, A.; Würfel, U.; Stranks, S.; Hinsch, A. | Conference Paper
|
| 2020 | Visualizing Morphological Principles for Efficient Photocurrent Generation in Organic Non-Fullerene Acceptor Blends
Köntges, W.; Perkhun, P.; Kammerer, J.; Alkarsifi, R.; Würfel, U.; Margeat, O.; Videlot-Ackermann, C.; Simon, J.-J.; Schröder, R.R.; Ackermann, J.; Pfannmöller, M. | Journal Article |
| 2019 | Advanced Electrical and Optical Characterization of Recombination in Organic Solar Cells
List, Mathias; Herten, G.; Weber, Eicke R. (Referent); Schumann, Marc (Referent) | Dissertation |
| 2019 | Do Zero-Energy Building Requirements Motivate Use of Higher Efficiency Solar Cells?: Presentation held at 46th IEEE Photovoltaic Specialists Conference (PVSC) 2019, Chicago, USA, June 19th
Bett, A.W. | Presentation
|
| 2019 | ITO-Free Organic Photovoltaic Modules Based on Fluorinated Polymers Deposited from Non-Halogenated Solution: A Major Step toward Large-Scale Module Production
Ibraikulov, O.A.; Wang, J.; Kamatham, N.; Heinrich, B.; Méry, S.; Kohlstädt, M.; Würfel, U.; Ferry, S.; Leclerc, N.; Heiser, T.; Lévêque, P. | Journal Article |
| 2019 | Recombination between Photogenerated and Electrode-Induced Charges Dominates the Fill Factor Losses in Optimized Organic Solar Cells
Würfel, U.; Perdigón-Toro, L.; Kurpiers, J.; Wolff, C.M.; Caprioglio, P.; Rech, J.J.; Zhu, J.; Zhan, X.; You, W.; Shoaee, S.; Neher, D.; Stolterfoht, M. | Journal Article |
| 2018 | Apparent Field-Dependence of the Charge Carrier Generation in Organic Solar Cells as a Result of (Bimolecular) Recombination
Würfel, U.; Unmüssig, M. | Journal Article |
| 2018 | Correct determination of charge transfer state energy from luminescence spectra in organic solar cells
List, M.; Sarkar, T.; Perkhun, P.; Ackermann, J.; Luo, C.; Würfel, U. | Journal Article
|
| 2018 | Electron-selective contacts via ulta-thin organic interface dipoles for silicon organic heterojunction solar cells
Reichel, C.; Würfel, U.; Winkler, K.; Schleiermacher, H.-F.; Kohlstädt, M.; Unmüssig, M.; Messmer, C.A.; Hermle, M.; Glunz, S.W. | Journal Article |
| 2018 | Numerical simulations and advanced characterization of organic solar cells
Spies, Annika; Weber, Eicke R. (Referent); Reiter, Günter (Referent) | Dissertation |
| 2018 | Silicon-Organic Heterojunction Solar Cells with Electron-Selective Contacts Based on Organic Interface Dipoles
Reichel, C.; Würfel, U.; Winkler, K.; Schleiermacher, H.-F.; Kohlstädt, M.; Unmüssig, M.; Messmer, C.; Hermle, M.; Glunz, S.W. | Conference Paper |
| 2018 | Trends in Solar Electricity: Presentation held at EuroSun, 12th International Conference on Solar Energy for Buildings and Industry 2018, Rapperswil, Switzerland, September 11th, 2018
Bett, A.W. | Presentation
|
| 2017 | Luminescence spectroscopy and thin-film interference effects in organic solar cells: Presentation held at E-MRS 2017 Spring Meeting, May 22 to 26, Strasbourg, France
List, M.; Reinhardt, Y.J.; Würfel, U. | Presentation |
| 2017 | On the impact of contact selectivity and charge transport on the open-circuit voltage of organic solar cells
Spies, A.; List, M.; Sarkar, T.; Würfel, U. | Journal Article |
| 2017 | Organic solar cells: Extraction of physical parameters by means of markov chain Monte Carlo techniques
Raba, A.; Leroy, Y.; Kohlstädt, M.; Würfel, U.; Cordan, A.-S. | Journal Article |
| 2017 | Positive side of disorder: Statistical fluorene-carbazole-TTBTBTT terpolymers show improved optoelectronic and photovoltaic properties compared to the regioregular structures
Akkuratov, A.; Mühlbach, S.; Susarova, D.K.; Seßler, M.; Zimmermann, B.; Razumov, V.F.; Würfel, U.; Troshin, P.A. | Journal Article |
| 2016 | Charge carrier selectivity for contacts for organic solar cells: Abstract
Spies, A.; List, M.; Sarkar, T.; Würfel, U. | Conference Paper
|
| 2016 | How molecules with dipole moments enhance the selectivity of electrodes in organic solar cells - a combined experimental and theoretical approach
Würfel, U.; Seßler, M.; Unmüßig, M.; Hofmann, N.; List, M.; Mankel, E.; Mayer, T.; Reiter, G.; Bubendorff, J.-L.; Simon, L.; Kohlstädt, M. | Journal Article |
| 2016 | Impact of charge carrier transport and electrode selectivity on the performance of organic solar cells: Presentation held at European Materials Research Society, E-MRS Fall Meeting 2016, Warsaw, Poland, September 19 to 22, 2016
Würfel, U.; Spies, A.; List, M.; Kohlstädt, M. | Presentation |
| 2016 | Impact of charge carrier transport and electrode selectivity on the performance of (organic) solar cells: Presentation held at International Conference on Simulation of Organic Electronics and Photovoltaics, SimOEP 2016, Zurich, Switzerland, 14.-16. September 2016
Würfel, U.; Spies, A.; List, M.; Kohlstädt, M. | Presentation |
| 2016 | Laser patterning of vacuum processed small molecular weight organic photovoltaics
Röttinger, S.; Schwarz, B.; Schäfer, S.; Gauch, R.; Zimmermann, B.; Würfel, U. | Journal Article |
| 2015 | Characterization of tandem organic solar cells
Timmreck, R.; Meyer, T.; Gilot, J.; Seifert, H.; Müller, T.; Furlan, A.; Wienk, M.M.; Wynands, D.; Hohl-Ebinger, J.; Warta, W.; Janssen, R.A.J.; Riede, M.; Leo, K. | Journal Article |
| 2015 | Charge carrier separation in solar cells
Würfel, U.; Cuevas, A.; Würfel, P. | Journal Article |
| 2015 | Determining the photocurrent of individual cells within an organic solar module by LBIC and the filtering approach: Experiments and simulations
Reinhardt, J.; Apilo, P.; Zimmermann, B.; Rousu, S.; Würfel, U. | Journal Article |
| 2015 | Ethanedithiol treatment of solution-processed ZnO thin films: Controlling the intragap states of electron transporting interlayers for efficient and stable inverted organic photovoltaics
Bai, S.; Jin, Y.; Liang, X.; Ye, Z.; Wu, Z.; Sun, B.; Ma, Z.; Tang, Z.; Wang, J.; Würfel, U.; Gao, F.; Zhang, F. | Journal Article |
| 2015 | Impact of charge transport on current-voltage characteristics and power-conversion efficiency of organic solar cells
Würfel, U.; Neher, D.; Spies, A.; Albrecht, S. | Journal Article |
| 2015 | Laminated fabric as top electrode for organic photovoltaics
Steim, R.; Chabrecek, P.; Sonderegger, U.; Kindle-Hasse, B.; Siefert, W.; Kroyer, T.; Reinecke, P.; Lanz, T.; Geiger, T.; Hany, R.; Nüesch, F. | Journal Article |
| 2015 | Layout flexibility for sheet-to-sheet produced flexible ITO-free organic solar modules with organic functional layers slot die coated under ambient atmospheric conditions
Kaduwal, D.; Schleiermacher, H.-F.; Schulz-Gericke, J.; Schiefer, S.; Liang Tan, Y.; Zhang, J.; Zimmermann, B.; Würfel, U. | Journal Article |
| 2015 | Ordering of PCDTBT revealed by time-resolved electron paramagnetic resonance spectroscopy of its triplet excitons
Biskup, T.; Sommer, M.; Rein, S.; Meyer, D.L.; Kohlstädt, M.; Würfel, U.; Weber, S. | Journal Article |
| 2015 | Towards continuous junction (CJ) organic electronic devices: Fast and clean post-polymerization modification by oxidation using dimethyldioxirane (DMDO)
Glöcklhofer, F.; Lumpi, D.; Kohlstädt, M.; Yurchenko, O.; Würfel, U.; Fröhlich, J. | Journal Article |
| 2014 | Applicability of the suns-Voc method on organic solar cells
Schiefer, S.; Zimmermann, B.; Glunz, S.W.; Würfel, U. | Journal Article |
| 2014 | Circuital model validation for S-shaped organic solar cells by means of impedance spectroscopy
Romero, B.; Pozo, G. del; Arredondo, B.; Reinhardt, J.; Sessler, M.; Würfel, U. | Journal Article |
| 2014 | Determination of the intrinsic and the injection dependent charge carrier density in organic solar cells using the suns-VOC method
Schiefer, S.; Zimmermann, B.; Würfel, U. | Journal Article |
| 2014 | Identifying the impact of surface recombination at electrodes in organic solar cells by means of electroluminescence and modeling
Reinhardt, J.; Grein, M.; Bühler, C.; Schubert, M.; Würfel, U. | Journal Article |
| 2014 | Impedance spectroscopy analysis of small molecule solution processed organic solar cell
Arredondo, B.; Romero, B.; Pozo, G. del; Sessler, M.; Veit, C.; Würfel, U. | Journal Article |
| 2014 | Improved efficiency of bulk heterojunction hybrid solar cells by utilizing CdSe quantum dot-graphene nanocomposites
Eck, M.; Pham, C. van; Züfle, S.; Neukom, M.; Seßler, M.; Scheunemann, D.; Erdem, E.; Weber, S.; Borchert, H.; Ruhstaller, B.; Krüger, M. | Journal Article |
| 2014 | Influence of the acceptor on electrical perfomance and charge carrier transport in bulk heterojunction solar cells with HXS-1
Ahme, H.; Lee, M.; Im, C.; Würfel, U. | Journal Article |
| 2014 | Promising long-term stability of encapsulated ITO-free bulk-heterojunction organic solar cells under different aging conditions
Sapkota, S.B.; Spies, A.; Zimmermann, B.; Dürr, I.; Würfel, U. | Journal Article |
| 2014 | Systematic variation of the stabilizer to reduce the annealing temperature of sol-gel derived titanium oxide in inverted organic solar cells
Seßler, M.; Kohlstädt, M.; Saeed, A.; Würfel, U. | Journal Article |
| 2013 | High yield fabrication of vertical interdigital electrodes with sub micrometer distance and their application in an organic photovoltaic device
Stelzl, F.; Schulz-Gericke, J.; Niggemann, M.; Würfel, U. | Journal Article |
| 2013 | Influence of hole extraction efficiency on the performance and stability of organic solar cells
Ecker, B.; Posdorfer, J.; Hauff, E. von | Journal Article |
| 2013 | Inverted ITO- and PEDOT:PSS-free polymer solar cells with high power conversion efficiency
Kohlstädt, M.; Grein, M.; Reinecke, P.; Kroyer, T.; Zimmermann, B.; Würfel, U. | Journal Article |
| 2013 | Layout optimization of organic wrap through solar cells by comined electrical and optical modeling
Schiefer, S.; Zimmermann, B.; Würfel, U. | Journal Article |
| 2013 | Performance of ITO-free inverted organic bulk heterojunction photodetectors: Comparison with standard device architecture
Arredondo, B.; Dios C. de; Vergaz, R.; Criado, A.R.; Romero, B.; Zimmermann, B.; Würfel, U. | Journal Article |
| 2013 | The physical meaning of charge extraction by linearly increasing voltage transients from organic solar cells
Hanfland, R.; Fischer, M.; Brütting, W.; Würfel, U.; MacKenzie, R.C.I. | Journal Article |
Fraunhofer-Institut für Solare Energiesysteme ISE