Surface recombination in organic solar cells: Intrinsic vs. doped active layer
Akhtanova G. Parkhomenko H.P. Vollbrecht J. Mostovyi A.I. Schopp N. Brus V.
February 2025Elsevier B.V.
Organic Electronics
2025#137
This study extends the analytical model of surface recombination in organic solar cells with an intrinsic active bulk-heterojunction layer. The key finding of the developed multi-mechanism recombination model accounting for the intrinsic active layer is that the slope of VOC vs. ln(Light Intensity) cannot be lower than 1.0 kT/q even at the extremely high concentrations of surface traps. We revealed the difference in recombination-related parameters determined in the scope of the multi-mechanism recombination model for the doped or intrinsic active layer and highlighted the importance of identifying the doping level of the active layer material. This is demonstrated by a synergy of comprehensive simulation and experimental analysis of organic solar cells with donor: acceptor blends: (PM6:Y6, PTB7-Th:COTIC-4F, PTB7-Th:O-IDTBR and PTB7-Th:ITIC-4F).
Non-fullerene acceptors , Non-geminate recombination , Organic bulk heterojunction solar cells , Surface recombination
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Department of Physics, School of Sciences and Humanities, Nazarbayev University, Astana, 010000, Kazakhstan
Department of Photovoltaics, Institute for Solar Energy Research Hamelin, Emmerthal, 31860, Germany
First Solar Inc., 28101 Cedar Park Blvd, Perrysburg, 43551, OH, United States
Department of Physics
Department of Photovoltaics
First Solar Inc.
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026