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Dominant Effects of First Monolayer Energetics at Donor/Acceptor Interfaces on Organic Photovoltaics
Author(s) -
Izawa Seiichiro,
Nakano Kyohei,
Suzuki Kaori,
Hashimoto Kazuhito,
Tajima Keisuke
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201500840
Subject(s) - organic solar cell , materials science , monolayer , acceptor , photovoltaics , chemical physics , charge (physics) , open circuit voltage , heterojunction , planar , optoelectronics , cascade , photovoltaic system , photochemistry , voltage , nanotechnology , chemical engineering , chemistry , polymer , condensed matter physics , ecology , physics , computer graphics (images) , quantum mechanics , computer science , engineering , composite material , biology
Energy levels of the first monolayer are manipulated at donor/acceptor interfaces in planar heterojunction organic photovoltaics by using molecular self‐organization. A “cascade” energy landscape allows thermal‐activation‐free charge generation by photoirradiation, destabilizes the energy of the interfacial charge‐transfer state, and suppresses bimolecular charge recombination, resulting in a higher open‐circuit voltage and fill factor.