Morphology-dependent carrier and exciton generations in regioregular poly(3-hexylthiophene) polymer diodes as revealed by bleaching spectroscopy

Bleaching probe spectroscopy performed for regioregular poly(3-hexylthiophene) diodes reveals that coexistent morphological phases determine the conducting and optical properties of conjugated polymer films. Photoinduced absorption measurements demonstrate that exciton migration occurs from lamella...

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Bibliographic Details
Published in:	Physical review letters Vol. 103; no. 18; p. 187402
Main Authors:	Kanemoto, Katsuichi, Yasui, Motoaki, Kosumi, Daisuke, Ogata, Akihiko, Sugisaki, Mitsuru, Karasawa, Tsutomu, Akai, Ichiro, Hashimoto, Hideki
Format:	Journal Article
Language:	English
Published:	United States 30-10-2009
Online Access:	Get full text
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Summary:	Bleaching probe spectroscopy performed for regioregular poly(3-hexylthiophene) diodes reveals that coexistent morphological phases determine the conducting and optical properties of conjugated polymer films. Photoinduced absorption measurements demonstrate that exciton migration occurs from lamella aggregates to morphological sites consisting of quasiuncoupled chains and that the latter sites determine steady-state photophysical properties. Spectroscopy synchronized with diode operation reveals that the morphological locations of injected carriers in polymer diodes vary with the applied bias.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0031-9007 1079-7114
DOI:	10.1103/physrevlett.103.187402