	Dr. Ulrich Wilhelm Paetzold
	Gruppenleiter Tel.: +49 721 608-26357 ulrich paetzoldNdz5∂kit edu	Karlsruhe Institute of Technology Institute of Microstructure Technology Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen

Research Interests

My research focusses on the interaction between light and structured matter for the purpose of engineering novel optical concepts and nanophotonic materials for low-cost solar energy harvesting and lightning. I am currently particularly interested in perovskite thin-film solar cells and perovskite based multijuntion photovoltaics. My research involves the fabrication, characterization, simulation and understanding of the device physics of perovskite optoelectronic devices.

For a list of current research topics, please have a look at the webpage of my group.

Publications

For a complete list of publications please see [Google Scholar ] or [ResearchGate ].

Short CV

2016 - present		Head of Research Group “Advanced Optics and Materials for Next Generation Photovoltaics“ at Institute of Microstructure Technology and Institute of Light Technology, Karlsruhe Institute of Technology (KIT). Coordinator of „Perovskite PV Taskforce“. Helmholtz Young Investigator Group.
2014 - 2016		PostDoc (DAAD scholar) and later permanent researcher in the PV Department at imec (Leuven, Belgium).
2013 – 2014		PostDoc at the IEK5 - Photovoltaics at Forschungszentrum Jülich GmbH.
2009 – 2012		Ph.D. in Physics from RWTH Aachen University. The research was conducted at the Institute of IEK5 - Photovoltaics at Forschungszentrum Jülich GmbH. Title: “Light Trapping with Plasmonic Back Contacts in Thin-Film Silicon Solar Cells”.
2006 – 2011		Interdisciplinary Master of Science in „Industrial Ecology“ from Chalmers University of Technology (Gothenburg, Sweden).
2003 – 2009		Diploma in Physics from RWTH Aachen University.

Publikationen

2019

CZTSe solar cells prepared by co-evaporation of multilayer Cu–Sn/Cu,Zn,Sn,Se/ZnSe/Cu,Zn,Sn,Se stacks.
Mwakyusa, L. P.; Neuwirth, M.; Kogler, W.; Schnabel, T.; Ahlswede, E.; Paetzold, U. W.; Richards, B. S.; Hetterich, M.
2019. Physica scripta, 94 (10), 105007. doi:10.1088/1402-4896/ab2b16

Liquid glass for photovoltaics: multi-functional front cover glass for solar modules.
Langenhorst, M.; Ritzer, D.; Kotz, F.; Risch, P.; Dottermusch, S.; Roslizar, A.; Schmager, R.; Richards, B. S.; Rapp, B. E.; Paetzold, U. W.
2019. ACS applied materials & interfaces, acsami.9b12896. doi:10.1021/acsami.9b12896

Drying Dynamics of Solution‐Processed Perovskite Thin‐Film Photovoltaics: In Situ Characterization, Modeling, and Process Control [in press].
Ternes, S.; Börnhorst, T.; Schwenzer, J. A.; Hossain, I. M.; Abzieher, T.; Mehlmann, W.; Lemmer, U.; Scharfer, P.; Schabel, W.; Richards, B. S.; Paetzold, U. W.
2019. Advanced energy materials, Article no: 1901581. doi:10.1002/aenm.201901581

Perovskite Solar Cells: Record Open‐Circuit Voltage Wide‐Bandgap Perovskite Solar Cells Utilizing 2D/3D Perovskite Heterostructure.
Gharibzadeh, S.; Abdollahi Nejand, B.; Jakoby, M.; Abzieher, T.; Hauschild, D.; Moghadamzadeh, S.; Schwenzer, J. A.; Brenner, P.; Schmager, R.; Haghighirad, A. A.; Weinhardt, L.; Lemmer, U.; Richards, B. S.; Howard, I. A.; Paetzold, U. W.
2019. Advanced energy materials, 9 (21), 1970079. doi:10.1002/aenm.201970079

Light coupling to quasi-guided modes in nanoimprinted perovskite solar cells.
Schmager, R.; Hossain, I. M.; Schackmar, F. R.; Richards, B. S.; Gomard, G.; Paetzold, U. W.
2019. Solar energy materials & solar cells, 201, Art.-Nr.: 110080. doi:10.1016/j.solmat.2019.110080

Photon recycling in nanopatterned perovskite thin-films for photovoltaic applications.
Nanz, S.; Schmager, R.; Abebe, M. G.; Willig, C.; Wickberg, A.; Abass, A.; Gomard, G.; Wegener, M.; Paetzold, U. W.; Rockstuhl, C.
2019. APL photonics, 4 (7), Art.Nr.: 076104. doi:10.1063/1.5094579

Efficient All-Evaporated pin-Perovskite Solar Cells: A Promising Approach Toward Industrial Large-Scale Fabrication [in press].
Abzieher, T.; Schwenzer, J. A.; Moghadamzadeh, S.; Sutterluti, F.; Hossain, I. M.; Pfau, M.; Lotter, E.; Hetterich, M.; Richards, B. S.; Lemmer, U.; Powalla, M.; Paetzold, U. W.
2019. IEEE journal of photovoltaics. doi:10.1109/JPHOTOV.2019.2920727

Continuous Wave Amplified Spontaneous Emission from Mixed Cation Perovskite devices.
Brenner, P.; Bar-On, O.; Jakoby, M.; Allegro, I.; Richards, B. S.; Paetzold, U. W.; Howard, I. A.; Scheuer, J.; Lemmer, U.
2019. Conference on Lasers and Electro-Optics, JTu2A.71, OSA, Washington, D.C. doi:10.1364/CLEO_AT.2019.JTu2A.71

Toward scalable perovskite-based multijunction solar modules.
Jaysankar, M.; Paetel, S.; Ahlswede, E.; Paetzold, U. W.; Aernouts, T.; Gehlhaar, R.; Poortmans, J.
2019. Progress in photovoltaics, 27 (8), 733–738. doi:10.1002/pip.3153

Light Management: A Key Concept in High-Efficiency Perovskite/Silicon Tandem Photovoltaics.
Jacobs, D. A.; Langenhorst, M.; Sahli, F.; Richards, B. S.; White, T. P.; Ballif, C.; Catchpole, K. R.; Paetzold, U. W.
2019. The journal of physical chemistry letters, 10 (11), 3159–3170. doi:10.1021/acs.jpclett.8b03721

Model for the Prediction of the Lifetime and Energy Yield of Methyl Ammonium Lead Iodide Perovskite Solar Cells at Elevated Temperatures.
Bastos, J. P.; Uytterhoeven, G.; Qiu, W.; Paetzold, U. W.; Cheyns, D.; Surana, S.; Rivas, J.; Jaysankar, M.; Song, W.; Aernouts, T.; Poortmans, J.; Gehlhaar, R.
2019. ACS applied materials & interfaces, 11 (18), 16517–16526. doi:10.1021/acsami.9b00923

Micro-cone textures for improved light in-coupling and retroreflection-inspired light trapping at the front surface of solar modules [in press].
Dottermusch, S.; Schmager, R.; Klampaftis, E.; Paetel, S.; Kiowski, O.; Ding, K.; Richards, B. S.; Paetzold, U. W.
2019. Progress in photovoltaics. doi:10.1002/pip.3133

Methodology of energy yield modelling of perovskite-based multi-junction photovoltaics.
Schmager, R.; Langenhorst, M.; Lehr, J.; Lemmer, U.; Richards, B. S.; Paetzold, U. W.
2019. Optics express, 27 (8), A507-A523. doi:10.1364/OE.27.00A507

Record Open‐Circuit Voltage Wide‐Bandgap Perovskite Solar Cells Utilizing 2D/3D Perovskite Heterostructure.
Gharibzadeh, S.; Abdollahi Nejand, B.; Jakoby, M.; Abzieher, T.; Hauschild, D.; Moghadamzadeh, S.; Schwenzer, J. A.; Brenner, P.; Schmager, R.; Haghighirad, A. A.; Weinhardt, L.; Lemmer, U.; Richards, B. S.; Howard, I. A.; Paetzold, U. W.
2019. Advanced energy materials, 9 (21), Article: 1803699. doi:10.1002/aenm.201803699

Coated and Printed Perovskites for Photovoltaic Applications.
Howard, I. A.; Abzieher, T.; Hossain, I. M.; Eggers, H.; Schackmar, F.; Ternes, S.; Richards, B. S.; Lemmer, U.; Paetzold, U. W.
2019. Advanced materials, 1806702. doi:10.1002/adma.201806702

Influence of excitonic effects on charge carrier extraction in organic-inorganic perovskite solar cells.
Lange, P.; Ruf, F.; Hossain, I. M.; Paetzold, U. W.; Schultes, M.; Ahlswede, E.; Kalt, H.; Hetterich, M.
2019. DPG-Frühjahrstagung der Sektion Kondensierte Materie (SKM), Fachverband Halbleiterphysik (2019), Regensburg, Deutschland, 31. März–5. April 2019

Continuous wave amplified spontaneous emission in phase-stable lead halide perovskites.
Brenner, P.; Bar-On, O.; Jakoby, M.; Allegro, I.; Richards, B. S.; Paetzold, U. W.; Howard, I. A.; Scheuer, J.; Lemmer, U.
2019. Nature Communications, 10 (1), Article-Nr.: 988. doi:10.1038/s41467-019-08929-0

Electron-Beam-Evaporated Nickel Oxide Hole Transport Layers for Perovskite-Based Photovoltaics.
Abzieher, T.; Moghadamzadeh, S.; Schackmar, F.; Eggers, H.; Sutterlüti, F.; Farooq, A.; Kojda, D.; Habicht, K.; Schmager, R.; Mertens, A.; Azmi, R.; Klohr, L.; Schwenzer, J. A.; Hetterich, M.; Lemmer, U.; Richards, B. S.; Powalla, M.; Paetzold, U. W.
2019. Advanced energy materials, 9 (12), Article no 1802995. doi:10.1002/aenm.201802995

Scalable Processing of Low-Temperature TiO₂ Nanoparticles for High-Efficiency Perovskite Solar Cells.
Hossain, I. M.; Hudry, D.; Mathies, F.; Abzieher, T.; Moghadamzadeh, S.; Rueda-Delgado, D.; Schackmar, F.; Bruns, M.; Andriessen, R.; Aernouts, T.; Di Giacomo, F.; Lemmer, U.; Richards, B. S.; Paetzold, U. W.; Hadipour, A.
2019. ACS applied energy materials, 2 (1), 47–58. doi:10.1021/acsaem.8b01567

Exposure-dependent refractive index of Nanoscribe IP-Dip photoresist layers.
Dottermusch, S.; Busko, D.; Langenhorst, M.; Paetzold, U. W.; Richards, B. S.
2019. Optics letters, 44 (1), 29. doi:10.1364/OL.44.000029

Nanophotonic perovskite layers for enhanced current generation and mitigation of lead in perovskite solar cells.
Schmager, R.; Gomard, G.; Richards, B. S.; Paetzold, U. W.
2019. Solar energy materials & solar cells, 192, 65–71. doi:10.1016/j.solmat.2018.12.012

Self-cleaning performance of superhydrophobic hot-embossed fluoropolymer films for photovoltaic modules.
Roslizar, A.; Dottermusch, S.; Vüllers, F.; Kavalenka, M. N.; Guttmann, M.; Schneider, M.; Paetzold, U. W.; Hölscher, H.; Richards, B. S.; Klampaftis, E.
2019. Solar energy materials & solar cells, 189, 188–196. doi:10.1016/j.solmat.2018.09.017

2018

Towards nano-patterned perovskite layers for enhanced absorption in solar cells.
Schmager, R.; Abzieher, T.; Brenner, P.; Assadillayev, A.; Lee, D. J.; Moghadamzadeh, S.; Hossain, I. M.; Lemmer, U.; Richards, B. S.; Paetzold, U. W.
2018. 7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018; Waikoloa Village; United States; 10 June 2018 through 15 June 2018, 15–17, IEEE, Piscataway (NJ). doi:10.1109/PVSC.2018.8548029

Towards Inexpensive and Stable All-Evaporated Perovskite Solar Cells for Industrial Large-Scale Fabrication.
Abzieher, T.; Schwenzer, J. A.; Sutterlüti, F.; Pfau, M.; Lotter, E.; Het-Terich, M.; Lemmer, U.; Powalla, M.; Paetzold, U. W.
2018. 7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018; Waikoloa Village; United States; 10 June 2018 through 15 June 2018, 2803–2807, IEEE, Piscataway (NJ). doi:10.1109/PVSC.2018.8547364

Inkjet Printed Perovskite Photovoltaics.
Mathies, F.; Richards, B. S.; Hernandez-Sosa, G.; Lemmer, U.; Paetzold, U. W.
2018. 7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018; Waikoloa Village; United States; 10 June 2018 through 15 June 2018, 1721–1723, IEEE, Piscataway (NJ). doi:10.1109/PVSC.2018.8548265

Design and Color Flexibility for Inkjet-Printed Perovskite Photovoltaics.
Schlisske, S.; Mathies, F.; Busko, D.; Strobel, N.; Rödlmeier, T.; Richards, B. S.; Lemmer, U.; Paetzold, U. W.; Hernandez-Sosa, G.; Klampaftis, E.
2018. ACS applied energy materials, 2 (1), 764–769. doi:10.1021/acsaem.8b01829

Energy yield of all thin-film perovskite/CIGS tandem solar modules [in press].
Langenhorst, M.; Sautter, B.; Schmager, R.; Lehr, J.; Ahlswede, E.; Powalla, M.; Lemmer, U.; Richards, B. S.; Paetzold, U. W.
2018. Progress in photovoltaics. doi:10.1002/pip.3091

Stable Perovskite Solar Cell Architectures: Robustness against Temperature Variations Under Real World Conditions.
Schwenzer, J. A.; Rakocevic, L.; Abzieher, T.; Rueda-Delgad, D.; Gehlhaar, R.; Richards, B. S.; Lemmer, U.; Paetzold, U. W.
2018. 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC), 2816–2819, IEEE, Piscataway (NJ). doi:10.1109/PVSC.2018.8547781

Energy Yield Modelling of Wide Bandgap Perovskite-Based Tandem Solar Modules.
Langenhorst, M.; Lehr, J.; Sautter, B.; Schmager, R.; Lemmer, U.; Richards, B.; Paetzold, U. W.
2018. Optics for Solar Energy, Singapore, 5–8 November 2018, OW5C.3/1–2, OSA, Washington, D.C. doi:10.1364/OSE.2018.OW5C.3

Rigorous Wave-Optical Simulation of Photon Recycling in Nanostructured Perovskite Solar Cells [in press].
Nanz, S.; Schmager, R.; Abass, A.; Abebe, M. G.; Gomard, G.; Paetzold, U. W.; Rockstuhl, C.
2018. Optics in Solar Energy (SOLAR) - OSA Light, Energy and the Environment Congress, Singapore, 5 – 8 November 2018, OT5C.2, OSA, Washington, D.C. doi:10.1364/OSE.2018.OT5C.2

Impact of Fabrication Parameters on the Self-cleaning Performance of Hot-embossed Fluoropolymer Films for Photovoltaic Modules.
Roslizar, A.; Dottermusch, S.; Vüllers, F.; Kavalenka, M. N.; Guttmann, M.; Schneider, M.; Klampaftis, E.; Paetzold, U. W.; Hölscher, H.; Richards, B. S.
2018. Optics for Solar Energy, Singapore, 5–8 November 2018, OM3D.4, OSA, Washington (D.C.). doi:10.1364/OSE.2018.OM3D.4

Realization of Colors and Patterns for Inkjet-Printed Perovskite Solar Cells.
Schlisske, S.; Mathies, F.; Busko, D.; Strobel, N.; Rödlmeier, T.; Lemmer, U.; Paetzold, U. W.; Hernandez-Sosa, G.; Klampaftis, E.; Richards, B. S.
2018. Optics and Photonics for Energy and the Environment, Singapore, 5–8 November 2018, JM4A.6, OSA, Washington, D.C. doi:10.1364/EE.2018.JM4A.6

Energy yield modelling of perovskite/silicon two-terminal tandem PV modules with flat and textured interfaces.
Lehr, J.; Langenhorst, M.; Schmager, R.; Kirner, S.; Lemmer, U.; Richards, B. S.; Case, C.; Paetzold, U. W.
2018. Sustainable energy & fuels, 2018 (2), 2754–2761. doi:10.1039/C8SE00465J

Rigorous wave-optical treatment of photon recycling in thermodynamics of photovoltaics: Perovskite thin-film solar cells.
Abebe, M. G.; Abass, A.; Gomard, G.; Zschiedrich, L.; Lemmer, U.; Richards, B. S.; Rockstuhl, C.; Paetzold, U. W.
2018. Physical review / B, 98 (7), Article: 075141. doi:10.1103/PhysRevB.98.075141

Towards mass fabrication of hot embossed plant surface texture replicas as photovoltaic cover layers.
Fritz, B.; Guttmann, M.; Casas Soler, P.; Roslizar, A.; Langenhorst, M.; Schneider, M.; Paetzold, U. W.; Richards, B. S.; Lemmer, U.; Huenig, R.; Gomard, G.
2018. SPIE Nanoscience + Engineering - Nanoengineering: Fabrication, Properties, Optics, and Devices XV, San Diego, United States, USA,19–23 August 2018. Ed.: B. Panchapakesan, 107300J-1–17, SPIE, Bellingham (WA). doi:10.1117/12.2320555

Perovskite–silicon tandem solar modules with optimised light harvesting.
Jaysankar, M.; Filipič, M.; Zielinski, B.; Schmager, R.; Song, W.; Qiu, W.; Paetzold, U. W.; Aernouts, T.; Debucquoy, M.; Gehlhaar, R.; Poortmans, J.
2018. Energy & environmental science, 11 (6), 1489–1498. doi:10.1039/C8EE00237A

Spectral Dependence of Degradation under Ultraviolet Light in Perovskite Solar Cells.
Farooq, A.; Hossain, I. M.; Moghadamzadeh, S.; Schwenzer, J. A.; Abzieher, T.; Richards, B. S.; Klampaftis, E.; Paetzold, U. W.
2018. ACS applied materials & interfaces, 10 (26), 21985–21990. doi:10.1021/acsami.8b03024

Inkjet-Printed Triple Cation Perovskite Solar Cells.
Mathies, F.; Eggers, H.; Richards, B. S.; Hernandez-Sosa, G.; Lemmer, U.; Paetzold, U. W.
2018. ACS Applied Energy Materials, 1 (5), 1834–1839. doi:10.1021/acsaem.8b00222

Light-Induced Degradation of Perovskite Solar Cells: The Influence of 4-Tert-Butyl Pyridine and Gold.
Bastos, J. P.; Paetzold, U. W.; Gehlhaar, R.; Qiu, W.; Cheyns, D.; Surana, S.; Spampinato, V.; Aernouts, T.; Poortmans, J.
2018. Advanced energy materials, 8 (23), 1800554. doi:10.1002/aenm.201800554

Temperature Variation-Induced Performance Decline of Perovskite Solar Cells.
Schwenzer, J. A.; Rakocevic, L.; Gehlhaar, R.; Abzieher, T.; Gharibzadeh, S.; Moghadamzadeh, S.; Quintilla, A.; Richards, B. S.; Lemmer, U.; Paetzold, U. W.
2018. ACS applied materials & interfaces, 10 (19), 16390–16399. doi:10.1021/acsami.8b01033

Freeform surface invisibility cloaking of interconnection lines in thin-film photovoltaic modules.
Langenhorst, M.; Schumann, M. F.; Paetel, S.; Schmager, R.; Lemmer, U.; Richards, B. S.; Wegener, M.; Paetzold, U. W.
2018. Solar energy materials & solar cells, 182, 294–301. doi:10.1016/j.solmat.2018.03.034

CZTSe solar cells prepared by co-evaporation of Cu-Sn/CZTSe/ZnSe/CZTSe layer stacks.
Mwakysa, L.; Neuwirth, M.; Paetzold, U.; Richards, B.; Kalt, H.; Hetterich, M.
2018. DPG-Frühjahrstagung der Sektion Kondensierte Materie gemeinsam mit der EPS, Fachverband Halbleiterphysik, Berlin, 11.-16.März 2018

Inkjet-printed perovskite distributed feedback lasers.
Mathies, F.; Brenner, P.; Hernandez-Sosa, G.; Howard, I. A.; Paetzold, U. W.; Lemmer, U.
2018. Optics express, 26 (2), A144 - A152. doi:10.1364/OE.26.00A144

Disordered diffraction gratings tailored by shape-memory based wrinkling and their application to photovoltaics.
Schauer, S.; Schmager, R.; Hünig, R.; Ding, K.; Paetzold, U. W.; Lemmer, U.; Worgull, M.; Hölscher, H.; Gomard, G.
2018. Optical materials express, 8 (1), 184–198. doi:10.1364/OME.8.000184

2017

Scalable and low cost fabrication methods for wavelength tunable solution processed perovskite distributed feedback lasers.
Brenner, P.; Mathies, F.; Kapp, D.; Paetzold, U.; Quintilla, A.; Hernandez-Sosa, G.; Howard, I.; Lemmer, U.
2017. Proceedings of the European Conference on Lasers and Electro-Optics 2017, Munich, Germany, 25th - 29th June 2017, Art.Nr. JSV_3_2, OSA - The Optical Society, Wahington (DC)

Cloaking of contact fingers on solar cells and OLEDs using free-form surfaces designed by coordinate transformations (Conference Presentation).
Schumann, M. F.; Langenhorst, M.; Smeets, M.; Ding, K.; Paetzold, U. W.; Fritz, B.; Eckstein, R.; Gomard, G.; Wegener, M.
2017. Metamaterials, Metadevices, and Metasystems 2017. Ed.: N. Engheta, Art. Nr. 1034314, SPIE, Bellingham (WA). doi:10.1117/12.2272911

Scalable perovskite/CIGS thin-film solar module with power conversion efficiency of 17.8%.
Paetzold, U. W.; Jaysankar, M.; Gehlhaar, R.; Ahlswede, E.; Paetel, S.; Qiu, W.; Bastos, J.; Rakocevic, L.; Richards, B. S.; Aernouts, T.; Powalla, M.; Poortmans, J.
2017. Journal of materials chemistry / A, 5 (20), 9897–9906. doi:10.1039/C7TA01651D

Optical Analysis of Planar Multicrystalline Perovskite Solar Cells.
Eerden, M. van; Jaysankar, M.; Hadipour, A.; Merckx, T.; Schermer, J. J.; Aernouts, T.; Poortmans, J.; Paetzold, U. W.
2017. Advanced optical materials, 5 (18), Art. Nr.: 1700151. doi:10.1002/adom.201700151

Performance of silicon solar cells with cloaked contact fingers under realistic conditions.
Langenhorst, M.; Schumann, M. F.; Schmager, R.; Lehr, J.; Lemmer, U.; Wegener, M.; Richards, B.; Paetzold, U. W.
2017. Optical Nanostructures and Advanced Materials for Photovoltaics, Boulder, United States, 6th - 9th November 2017, OSA - The Optical Society, Wahington (DC). doi:10.1364/PV.2017.PW2A.3

Thermodynamics of photon recycling in four terminal perovskite/Si tandem solar cells.
Abebe, M. G.; Gomard, G.; Zschiedrich, L.; Rockstuhl, C.; Paetzold, U. W.; Abass, A.
2017. Optical Nanostructures and Advanced Materials for Photovoltaics, Boulder, United States, 6th - 9th November 2017, OSA - The Optical Society, Wahington (DC). doi:10.1364/PV.2017.PM4A.2

Additive-Assisted Crystallization Dynamics in Two-Step Fabrication of Perovskite Solar Cells.
Abzieher, T.; Mathies, F.; Hetterich, M.; Welle, A.; Gerthsen, D.; Lemmer, U.; Paetzold, U. W.; Powalla, M.
2017. Physica status solidi / A, 214 (12), Art.Nr. 1700509. doi:10.1002/pssa.201700509

Triple cation mixed-halide perovskites for tunable lasers.
Brenner, P.; Glöckler, T.; Rueda-Delgado, D.; Abzieher, T.; Jakoby, M.; Richards, B. S.; Paetzold, U. W.; Howard, I. A.; Lemmer, U.
2017. Optical materials express, 7 (11), 4082–4094. doi:10.1364/OME.7.004082

Texture of the Viola Flower for Light Harvesting in Photovoltaics.
Schmager, R.; Fritz, B.; Hünig, R.; Ding, K.; Lemmer, U.; Richards, B. S.; Gomard, G.; Paetzold, U. W.
2017. ACS photonics, 2687–2692. doi:10.1021/acsphotonics.7b01153

Broadening of Light Coupling to Waveguide Modes in Solar Cells by Disordered Grating Texturess.
Bittkau, K.; Hoffmann, A.; Paetzold, U. W.; Carius, R.
2017. Applied Sciences, 7 (7), Art. Nr. 725. doi:10.3390/app7070725

All-Angle Invisibility Cloaking of Contact Fingers on Solar Cells by Refractive Free-Form Surfaces.
Schumann, M. F.; Langenhorst, M.; Smeets, M.; Ding, K.; Paetzold, U. W.; Wegener, M.
2017. Advanced optical materials, 5 (17), Art. Nr. 1700164. doi:10.1002/adom.201700164

Low-cost electrodes for stable perovskite solar cells.
Bastos, J. P.; Manghooli, S.; Jaysankar, M.; Tait, J. G.; Qiu, W.; Gehlhaar, R.; De Volder, M.; Uytterhoeven, G.; Poortmans, J.; Paetzold, U. W.
2017. Applied physics letters, 110 (23), Art. Nr. 233902. doi:10.1063/1.4984284

Infiltrated photonic crystals for light-trapping in CuInSe₂ nanocrystal-based solar cells.
Dottermusch, S.; Quintilla, A.; Gomard, G.; Roslizar, A.; Voggu, V. R.; Simonsen, B. A.; Park, J. S.; Pernik, D. R.; Korgel, B. A.; Paetzold, U. W.; Richards, B. S.
2017. Optics express, 25 (12), A502-A514. doi:10.1364/OE.25.00A502

Four-Terminal Perovskite/Silicon Multijunction Solar Modules.
Jaysankar, M.; Qiu, W.; Eerden, M. van; Aernouts, T.; Gehlhaar, R.; Debucquoy, M.; Paetzold, U. W.; Poortmans, J.
2017. Advanced energy materials, 7 (15), Art. Nr. 1602807. doi:10.1002/aenm.201602807

Analysis of parasitic losses due to intermediate reflectors in silicon tandem solar cells.
Hoffmann, A.; Lambertz, A.; Haas, S.; Merzhanova, T.; Paetzold, U. W.; Meier, M.; Bittkau, K.
2017. Solar energy materials & solar cells, 163 (Apr.), 185–190. doi:10.1016/j.solmat.2017.01.010

2016

Simulation of Absorption Enhancement and Optical Modes in CIS Nanocrystal Embedded Photonic Crystal Designs.
Dottermusch, S.; Quintilla, A.; Gomard, G.; Paetzold, U. W.; Richards, B. S.
2016. Light, Energy and the Environment Congress, November 14-17, 2016, Leipzig, Germany, PTu2B.3, Optical Society of America. doi:10.1364/PV.2016.PTu2B.3

Direct Laser Written Nanophotonics for Embedded CIS Nanocrystal Solar Cells.
Dottermusch, S.; Quintilla, A.; Gomard, G.; Pernik, D.; Reddy, V.; Korgel, B.; Paetzold, U. W.; Richards, B. S.
2016. Light, Energy and the Environment Congress, November 14-17, 2016, Leipzig, Germany, PW3B.2, Optical Society of America. doi:10.1364/PV.2016.PW3B.2

Optical Loss Analyses and Energy Yield Modelling of Perovskite/silicon Multijunction Solar Cells.
Paetzold, U. W.; Gehlhaar, R.; Tait, J.; Qiu, W.; Bastos, J.; Debucquoy, M.; Jaysankar, M.; Aernouts, T.; Poortmans, J.
2016. Light, Energy and the Environment : Optics for Solar Energy, Leipzig, 14. - 17. November 2016, SoW2C.4/1–3, Optical Society of America, Washington D.C. doi:10.1364/OSE.2016.SoW2C.4

Multipass inkjet printed planar methylammonium lead iodide perovskite solar cells.
Mathies, F.; Abzieher, T.; Hochstuhl, A.; Glaser, K.; Colsmann, A.; Paetzold, U. W.; Hernandez-Sosa, G.; Lemmer, U.; Quintilla, A.
2016. Journal of materials chemistry / A, 4 (48), 19207–19213. doi:10.1039/C6TA07972E

Beyond Bulk Lifetimes: Insights into Lead Halide Perovskite Films from Time-Resolved Photoluminescence.
Staub, F.; Hempel, H.; Hebig, J.-C.; Mock, J.; Paetzold, U. W.; Rau, U.; Unold, T.; Kirchartz, T.
2016. Physical review applied, 6 (4), 044017. doi:10.1103/PhysRevApplied.6.044017

Nanophotonic Electrodes for Perovskite Thin-film Solar Cells.
Paetzold, U. W.; Qiu, W.; Gehlhaar, R.; Cheyns, D.; Poortmans, J.
2016. Optical Nanostructures and Advanced Materials for Photovoltaics 2016, Leipzig, 14.-17. November 2016, PM4B.3, Optical Society of America, Washington, DC. doi:10.1364/PV.2016.PM4B.3

Efficient post passivation light-management concepts for silicon heterojunction solar cells.
Smeets, M.; Meier, M.; Lentz, F.; Ding, K.; Paetzold, U. W.; Bittkau, K.
2016. 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC), Portland, OR, June 5-10 2016, 2975–2979, IEEE, Piscataway, NJ. doi:10.1109/PVSC.2016.7750207

Nanophotonic Light Management for Silicon Heterojunction Solar Cells with Planar Passivation Layers - Implementation and Material Perspective.
Smeets, M.; Ermes, M.; Pomaska, M.; Ding, K.; Paetzold, U. W.; Bittkau, K.
2016. Optical Nanostructures and Advanced Materials for Photovoltaics 2016, Leipzig, 14.-17. November 2016, PTh3A.5, Optical Society of America, Washington, DC. doi:10.1364/PV.2016.PTh3A.5

Post passivation light trapping back contacts for silicon heterojunction solar cells.
Smeets, M.; Bittkau, K.; Lentz, F.; Richter, A.; Ding, K.; Carius, R.; Rau, U.; Paetzold, U. W.
2016. Nanoscale, 8 (44), 18726–18733. doi:10.1039/C6NR04960E

Highly Reflective Dielectric Back Reflector for Improved Efficiency of Tandem Thin-Film Solar Cells.
Barugkin, C.; Paetzold, U. W.; Catchpole, K. R.; Basch, A.; Carius, R.
2016. International journal of photoenergy, 2016, Art. Nr.: 7390974. doi:10.1155/2016/7390974

Highly stable solution processed metal-halide perovskite lasers on nanoimprinted distributed feedback structures.
Brenner, P.; Stulz, M.; Kapp, D.; Abzieher, T.; Paetzold, U. W.; Quintilla, A.; Howard, I. A.; Kalt, H.; Lemmer, U.
2016. Applied physics letters, 109 (14), 141106. doi:10.1063/1.4963893

Crystallisation dynamics in wide-bandgap perovskite films.
Jaysankar, M.; Qiu, W.; Bastos, J.; Tait, J. G.; Debucquoy, M.; Paetzold, U. W.; Cheynsa, D.; Poortmans, J.
2016. Journal of materials chemistry / A, 4 (27), 10524–10531. doi:10.1039/c6ta02769e

2015

Cloaked contact grids on solar cells by coordinate transformations: designs and prototypes.
Schumann, M. F.; Wiesendanger, S.; Goldschmidt, J. C.; Bläsi, B.; Bittkau, K.; Paetzold, U. W.; Sprafke, A.; Wehrspohn, R. B.; Rockstuhl, C.; Wegener, M.
2015. Optica, 2, 850–853. doi:10.1364/OPTICA.2.000850

2014

Broadening of Light Coupling to Waveguide Modes in Solar Cells by Disordered Grating Textures.
Bittkau, K.; Hoffmann, A.; Paetzold, U. W.; Carius, R.
2014. Optical Nanostructures and Advanced Materials for Photovoltaics 2016, Leipzig, Germany, 14-17 November 2016, Art.Nr. PTh2A.5, OSA - The Optical Society, Washington (DC). doi:10.1364/PV.2016.PTh2A.5

Dr. Ulrich Wilhelm Paetzold

Publikationen