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Proceedings Paper

Absolute polaron yield of donor-acceptor P3HT:fullerene bulk heterojunction composites
Author(s): Saptaparna Das; Alia A. Latif; William Thornbury; Barry C. Thompson; Stephen E. Bradforth
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Paper Abstract

Broadband pump-probe spectroscopy over the entire time range (200 fs to 500 ns) relevant to monitor the polaron generation and recombination dynamics were performed on the bulk heterojunction composites of poly (3- hexylthiophene) (P3HT) and poly(3-hexylthiophene-thiophene-diketopyrrolopyrrole) (P3HTT-DPP-10%) with [6,6]- phenyl-C61-butyric acid methyl ester (PCBM) as the acceptor. The modeling of the polaron dynamics with the Debye- Smoluchowski diffusion model provides the charge separation length at the polymer:fullerene interface. Furthermore, the computed polaron yield using the polaron cross-section over the entire time range reveals the amount of photo-generated charges in P3HT:PCBM and P3HTT-DPP-10%:PCBM bulk-heterojunction thin films.

Paper Details

Date Published: 20 August 2015
PDF: 9 pages
Proc. SPIE 9549, Physical Chemistry of Interfaces and Nanomaterials XIV, 95490N (20 August 2015); doi: 10.1117/12.2189531
Show Author Affiliations
Saptaparna Das, The Univ. of Southern California (United States)
Alia A. Latif, The Univ. of Southern California (United States)
William Thornbury, The Univ. of Southern California (United States)
Barry C. Thompson, The Univ. of Southern California (United States)
Stephen E. Bradforth, The Univ. of Southern California (United States)


Published in SPIE Proceedings Vol. 9549:
Physical Chemistry of Interfaces and Nanomaterials XIV
Sophia C. Hayes; Eric R. Bittner, Editor(s)

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