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Proceedings Paper

Long-lived photoexcitations in intercalated, partially and predominantly non-intercalated polymer:fullerene blends
Author(s): Fei Dou; Ester Buchaca-Domingo; Maciej Sakowicz; Xinping Zhang; Natalie Stingelin; Carlos Silva
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Paper Abstract

In this work, we study the nature of long-lived photoexcitations in intercalated, partially and predominantly non-intercalated semicrystalline poly(2,5-bis(3-tetradecyl-thiophen-2-yl)thieno [3,2,-b]thiophene) (pBTTT):phenyl-C61 -butyric acid methyl ester (PC61BM) blend films by quasi-steady-state photoinduced absorption (PIA) spectroscopy. We find that polarons are generated in these microstructures. However, the polarons generated in partially and predominantly non-intercalated films (1.7 eV) are at higher energy than in intercalated film (1.4 eV). After comparing with the polaron generation in neat pBTTT polymer film, we propose that the polarons generated in partially and predominantly non-intercalated film are delocalized charges, and the polarons generated in intercalated film are localized charges. Furthermore, we also find that the polarons generated in the partially non-intercalated film have the longest lifetime.

Paper Details

Date Published: 11 September 2013
PDF: 7 pages
Proc. SPIE 8811, Physical Chemistry of Interfaces and Nanomaterials XII, 88111J (11 September 2013); doi: 10.1117/12.2026147
Show Author Affiliations
Fei Dou, Univ. de Montréal (Canada)
Beijing Univ. of Technology (China)
Ester Buchaca-Domingo, Imperial College London (United Kingdom)
Maciej Sakowicz, Univ. de Montréal (Canada)
Xinping Zhang, Beijing Univ. of Technology (China)
Natalie Stingelin, Imperial College London (United Kingdom)
Carlos Silva, Univ. de Montréal (Canada)


Published in SPIE Proceedings Vol. 8811:
Physical Chemistry of Interfaces and Nanomaterials XII
Natalie Banerji; Carlos Silva, Editor(s)

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