Premium
An Amorphous Mesophase Generated by Thermal Annealing for High‐Performance Organic Photovoltaic Devices
Author(s) -
Tanaka Hideyuki,
Abe Yoko,
Matsuo Yutaka,
Kawai Junya,
Soga Iwao,
Sato Yoshiharu,
Nakamura Eiichi
Publication year - 2012
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.201200490
Subject(s) - mesophase , materials science , amorphous solid , annealing (glass) , acceptor , photovoltaic system , thermal , organic solar cell , nanotechnology , chemical engineering , optoelectronics , crystallography , liquid crystal , polymer , composite material , engineering , condensed matter physics , ecology , biology , chemistry , physics , meteorology
Thermal annealing of a p‐i‐n organic photovoltaic device containing a crystalline benzoporphyrin donor and solvated crystals of a silylmethylfullerene acceptor increases the device performance at a temperature where partial desolvation of the acceptor produces an amorphous mesophase. This suggests that the mesophase improves the hierarchical ordering of the materials, that is, the morphology of the n‐layer and the interfacial contact and, hence, the carrier generation efficiency at the donor–acceptor interface.