Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 352, Issue 9-20, Pages 1167-1171Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2005.11.099
Keywords
solar cells; photovoltaics; polymers and organics
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We have investigated the bimolecular recombination coefficient (B) of charge carriers in low-mobility materials, in which the Langevin recombination is reduced: inorganic a-Si:H, mu c-Si:H and the organic regioregular poly(3-hexylthiophene)/1-(3-methoxycarbonyl)propyl-1-phenyl-[6,6]-methanofullerene (RR-PHT/PCBM) blend. We have been using a multitude of experimental techniques, namely space-charge-limited current (SCLC), photogenerated charge carrier extraction by linearly increasing voltage (photo-CELIV) and double injection (Dol) current transient techniques for investigation of temperature and electric field dependencies of B. For RR-PHT/PCBM blends, we observed a weak dependence of B on electric field and the most significant reduction of Langevin recombination. (c) 2006 Elsevier B.V. All rights reserved.
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