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Bipolar Charge Transport in Fullerene Molecules in a Bilayer and Blend of Polyfluorene Copolymer and Fullerene
Author(s) -
Gadisa Abay,
Tvingstedt Kristofer,
Vandewal Koen,
Zhang Fengling,
Manca Jean V.,
Inganäs Olle
Publication year - 2010
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.200902579
Subject(s) - polyfluorene , materials science , fullerene , polymer solar cell , bilayer , copolymer , electroluminescence , polymer , photochemistry , solar cell , chemical engineering , optoelectronics , nanotechnology , organic chemistry , membrane , composite material , layer (electronics) , chemistry , engineering , biochemistry
Efficient polymer solar cells typically contain the fullerene derivative [6,6]‐phenyl‐C61‐butyric acid methyl ester (PCBM), which promotes dissociation of excited states and enhances charge transport. The ability of PCBM to transport holes in solar cell bulk heterojunction films is monitored via the electroluminescence emission of a bulk heterojunction blend of PCBM and a polyfluorene copolymer. In polymer/fullerene bilayer diodes, fullerene emission is also observed.