Journal of Photopolymer Science and Technology
Online ISSN : 1349-6336
Print ISSN : 0914-9244
ISSN-L : 0914-9244
Morphology Effect on Geometry of Photoinduced Charge-Separated State in P3HT:PCBM Blend Films as Studied by Time-Resolved EPR Spectroscopy
Taku MiuraTakashi TachikawaYasuhiro Kobori
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2016 Volume 29 Issue 4 Pages 561-564

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Abstract

We have investigated the morphology effect on the nanostructure and the exchange coupling of the interfacial CS states in the RR-P3HT:PC60BM film. In the lower RR-P3HT content, the polymer crystalline phase is not formed by the strong interactions from the PC60BM molecules, resulting in the short-range CS states with the quick energy-wasting recombination. For the higher polymer content, it has been demonstrated that the PC60BM molecules bind to the crystalline polymer regions at the BHJs and that the hole-dissociations take place accompanying the delocalized hole distribution, resulting in the long-lived photocarrier generations. The above structural and electronic properties are essential keys to evaluations, designs, and developments of the highly efficient solar energy-conversion systems employing organic polymers in the OPV systems.

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© 2016 The Society of Photopolymer Science and Technology (SPST)
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