Trimolecular recombination in polythiophene: fullerene bulk heterojunction solar cells

In this work, reduced Langevin recombination in poly(3-hexylthiophene): 1-(3-methoxycarbonyl) propyl-1-phenyl[6,6]C61 blends has been studied with various methods. Using photogenerated charge carrier extraction by linearly increasing voltage technique, it was observed that charge carrier recombinati...

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Bibliographic Details
Published in:Applied physics letters 2008-10, Vol.93 (14)
Main Authors: Juška, G., Genevičius, K., Nekrašas, N., Sliaužys, G., Dennler, G.
Format: Article
Language:English
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Summary:In this work, reduced Langevin recombination in poly(3-hexylthiophene): 1-(3-methoxycarbonyl) propyl-1-phenyl[6,6]C61 blends has been studied with various methods. Using photogenerated charge carrier extraction by linearly increasing voltage technique, it was observed that charge carrier recombination transient corresponds to trimolecular recombination. By double injection current transient technique, it was shown that the influence of deep charge carrier trapping is insignificant and that trimolecular recombination coefficient γ is independent of the electric field. Finally, the temperature dependence of γ was measured by integral time-of-flight method.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2996588