期刊
ORGANIC ELECTRONICS
卷 7, 期 4, 页码 229-234出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.orgel.2006.02.004
关键词
mobility; recombination kinetics; lifetime; bulk-heterojunction; conjugated polymer; fullerene; organic solar cells
Charge carrier mobility (p), recombination kinetics, and lifetime (tau) have been investigated with the photo-induced charge carrier extraction by linearly increasing voltage technique (photo-CELIV) in blends of poly[2-methoxy-5-(3,7-dimethyloctyloxy)-phenylene vinylene] (MDMO-PPV) and 1-(3-methoxycarbonyl)propyl-1-phenyl-(6,6)-C-61(PCBM). Different MDMO-PPV/PCBM ratios have been studied showing that increasing the PCBM content induces an increase of the photo-CELIV mobility up to two orders of magnitude. Simultaneously, the lifetime of the charge carriers decreases in such a way that the product mu x tau appears almost constant independently of the blend composition. Recombination kinetics close to the Langevin one is observed for all PCBM concentrations studied. (c) 2006 Elsevier B.V. All rights reserved.
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