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Green‐Solvent‐Processed Molecular Solar Cells
Author(s) -
Chen Xiaofen,
Liu Xiaofeng,
Burgers Mark A.,
Huang Ye,
Bazan Guillermo C.
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201409208
Subject(s) - organic solar cell , polymer solar cell , energy conversion efficiency , organic semiconductor , materials science , solvent , hybrid solar cell , photovoltaics , fullerene , chemical engineering , nanotechnology , photochemistry , chemistry , optoelectronics , organic chemistry , photovoltaic system , polymer , composite material , engineering , biology , ecology
Abstract High‐efficiency bulk heterojunction (BHJ) organic solar cells with power conversion efficiencies of more than 5 % can be fabricated using the green solvent 2‐MeTHF. The active layers comprise a blend of a molecular semiconductor donor with intermediate dimensions (X2) and the soluble fullerene derivative [6,6]‐phenyl‐C 61 ‐butyricacidoctylester (PC 61 BC 8 ). A switch of the processing solvent from chloroform to 2‐MeTHF leads to no negative impacts on the morphology and charge‐transport properties of optimally performing BHJ films. Examinations by absorption spectroscopy, atomic force microscopy, and grazing incidence wide‐angle X‐ray scattering reveal no significant modification of morphology. These results show that green solvents can be excellent alternatives for large‐area printing of high‐performance organic photovoltaics (OPVs) and thus open new opportunities for sustainable mass production of organic solar cells and other optoelectronic devices.