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Enhancing Fullerene‐Based Solar Cell Lifetimes by Addition of a Fullerene Dumbbell
Author(s) -
Schroeder Bob C.,
Li Zhe,
Brady Michael A.,
Faria Gregório Couto,
Ashraf Raja Shahid,
Takacs Christopher J.,
Cowart John S.,
Duong Duc T.,
Chiu Kar Ho,
Tan ChingHong,
Cabral João T.,
Salleo Alberto,
Chabinyc Michael L.,
Durrant James R.,
McCulloch Iain
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201407310
Subject(s) - fullerene , dumbbell , organic solar cell , materials science , photovoltaics , nanotechnology , fullerene chemistry , active layer , solar cell , silicon , chemical engineering , layer (electronics) , photovoltaic system , chemistry , optoelectronics , polymer , organic chemistry , medicine , ecology , thin film transistor , engineering , composite material , biology , physical therapy
Cost‐effective, solution‐processable organic photovoltaics (OPV) present an interesting alternative to inorganic silicon‐based solar cells. However, one of the major remaining challenges of OPV devices is their lack of long‐term operational stability, especially at elevated temperatures. The synthesis of a fullerene dumbbell and its use as an additive in the active layer of a PCDTBT:PCBM‐based OPV device is reported. The addition of only 20 % of this novel fullerene not only leads to improved device efficiencies, but more importantly also to a dramatic increase in morphological stability under simulated operating conditions. Dynamic secondary ion mass spectrometry (DSIMS) and TEM are used, amongst other techniques, to elucidate the origins of the improved morphological stability.