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Photophysics of the Geminate Polaron‐Pair State in Copper Phthalocyanine Organic Photovoltaic Blends: Evidence for Enhanced Intersystem Crossing
Author(s) -
Snedden Edward W.,
Monkman Andrew P.,
Dias Fernando B.
Publication year - 2013
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.201201350
Subject(s) - intersystem crossing , materials science , copper phthalocyanine , polaron , phthalocyanine , photovoltaic system , copper , photochemistry , organic solar cell , optoelectronics , nanotechnology , polymer , chemistry , excited state , atomic physics , physics , quantum mechanics , singlet state , metallurgy , electron , ecology , composite material , biology
Geminate polaron‐pair recombination directly to the triplet state of the small dye molecule copper(II) 1,4,8,11,15,18,22,25‐octabutoxy‐29H,31H‐ phthalocyanine (CuPC) and exciton trapping in CuPC domains, combine to reduce the internal quantum efficiency of free polaron formation in the bulk‐heterojunction blends of CuPC doped with [6,6]‐phenyl‐C61‐butyric acid methyl ester (PCBM) as the electron acceptor.