Premium
Delayed Luminescence Spectroscopy of Organic Photovoltaic Binary Blend Films: Probing the Emissive Non‐geminate Charge Recombination
Author(s) -
Keivanidis Panagiotis E.,
Kamm Valentin,
DyerSmith Clare,
Zhang Weimin,
Laquai Frédéric,
McCulloch Iain,
Bradley Donal D. C.,
Nelson Jenny
Publication year - 2010
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.201002389
Subject(s) - materials science , recombination , luminescence , photovoltaic system , spectroscopy , optoelectronics , organic solar cell , charge (physics) , binary number , charge carrier , chemical physics , photochemistry , polymer , chemistry , composite material , physics , ecology , biochemistry , arithmetic , mathematics , quantum mechanics , biology , gene
Organic photovoltaics: Following the direct photoexcitation of the low‐energy optical gap PDI component in the F8BT:PDI photovoltaic blend film (step 1), charge generation takes place (steps 2, 3). Non‐geminate charge recombination (step 4) results in the generation of delayed luminescence (DL) in the μs time scale (step 5). The DL spectrum originates from an equilibrated charge‐transfer (CT) state formed between the components of the composite. The F8BT–PDI CT complex has a ground state character (step 6).