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Edward W. Snedden, Andrew P. Monkman and Fernando B. Dias Photophysics of the Geminate Polaron-Pair State in Copper Phthalocyanine Organic Photovoltaic Blends: Evidence for Enhanced Intersystem Crossing Advanced Materials 25

Version of Record online: 30 AUG 2012 | DOI: 10.1002/adma.201201350

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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.

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