J
Juliane Kniepert
Researcher at University of Potsdam
Publications - 15
Citations - 1878
Juliane Kniepert is an academic researcher from University of Potsdam. The author has contributed to research in topics: Charge carrier & Organic solar cell. The author has an hindex of 13, co-authored 15 publications receiving 1709 citations.
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Journal ArticleDOI
Competition between recombination and extraction of free charges determines the fill factor of organic solar cells.
Davide Bartesaghi,Irene del Carmen Perez,Juliane Kniepert,Steffen Roland,Mathieu Turbiez,Dieter Neher,L. Jan Anton Koster +6 more
TL;DR: The competition between charge extraction and recombination is quantified by using a single parameter θ, and it is demonstrated that this parameter is directly related to the fill factor of many different bulk-heterojunction solar cells.
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Fluorinated copolymer PCPDTBT with enhanced open-circuit voltage and reduced recombination for highly efficient polymer solar cells.
Steve Albrecht,Silvia Janietz,Wolfram Schindler,Johannes Frisch,Jona Kurpiers,Juliane Kniepert,Sahika Inal,Patrick Pingel,Konstantinos Fostiropoulos,Norbert Koch,Norbert Koch,Dieter Neher +11 more
TL;DR: A novel fluorinated copolymer is introduced and shown to exhibit significantly higher power conversion efficiency in bulk heterojunction solar cells with PC(70)BM compared to the well-known low-band-gap polymer PCPDTBT.
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Photogeneration and Recombination in P3HT/PCBM Solar Cells Probed by Time-Delayed Collection Field Experiments
TL;DR: In this paper, a pump-probe experiment using optical excitation and an electrical probe with a resolution of <100 ns was performed on bulk heterojunctions of poly(3-hexylthiophene) and poly(6,6)-phenylC71 butyric acid methyl ester.
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On the Field Dependence of Free Charge Carrier Generation and Recombination in Blends of PCPDTBT/PC70BM: Influence of Solvent Additives.
Steve Albrecht,Wolfram Schindler,Jona Kurpiers,Juliane Kniepert,James C. Blakesley,Ines Dumsch,Sybille Allard,Konstantinos Fostiropoulos,Ullrich Scherf,Dieter Neher +9 more
TL;DR: The results suggest that the solvent additive has severe impacts on the elementary processes involved in the photon to collected electron conversion in these blends of PCPDTBT/PC70BM processed with and without the solvent additives diiodooctane.
Journal ArticleDOI
Nongeminate and Geminate Recombination in PTB7:PCBM Solar Cells
Alexander Foertig,Juliane Kniepert,Markus Gluecker,Thomas J. K. Brenner,Vladimir Dyakonov,Dieter Neher,Carsten Deibel +6 more
TL;DR: In this article, a combination of transient photovoltage (TPV), voltage dependent charge extraction (CE), and time delayed collection field (TDCF) measurements is applied to poly(4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b']dithiophene-2,6-diyl] [3-fluoro-2-[(2ethyl hexyl)carbonyl] thieno[3,4-b]thiophenediyl]] (