Morphology dependent exciton formation in regioregular poly(3‐alkyl)thiophenes

Autor:	Mitsuru Sugisaki, Motoaki Yasui, Daisuke Kosumi, Katsuichi Kanemoto, Hideki Hashimoto, Tsutomu Karasawa
Rok vydání:	2010
Předmět:	Photoexcitation chemistry.chemical_classification Delocalized electron Chemistry Exciton Absorption (chemistry) Condensed Matter Physics Photochemistry Polaron Spectral line Recombination Alkyl
Zdroj:	physica status solidi c. 8:88-91
ISSN:	1610-1642 1862-6351
Popis:	The photophysics of the regioregular (RR) poly(3-alkylthiophene) (P3AT) films is investigated by cw-photoinduced absorption (PIA) measurements based on bleaching signals. The photoexcitation intensity dependence of the cw-PIA signals demonstrates that both photogenerated localized and delocalized polarons obey a bimolecular recombination process under cw photoexcitation. It is demonstrated that the lineshape of cw-PIA bleaching spectra for the P3AT films varies with the length of the alkyl substituents of P3AT. The bleaching spectra reveal a trend that the electron-phonon couplings of final exciton migration sites become strong with increasing the interlamella distance in the P3AT film. This indicates that interlamella couplings affect the electron-phonon couplings of the migration sites locating at two-dimensional lamellas. (© 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c159bdc543fda16d2a0967badb14e0f0 https://doi.org/10.1002/pssc.201000681 Zobrazit plný text záznamu Plný text