@inproceedings{ed2650d7a63b41c5a592bb2e5be4d1d5,
title = "Bimolecular Recombination in Regioregular and Regiorandom Poly(3-Hexylthiophene):PCBM Using Photoinduced Absorption Spectroscopy",
abstract = "We have used photoinduced absorption (PA) spectroscopy and measured the intensity dependence on thin films of 1:1 blends of regioregular-poly(3- hexylthiophene):PCBM before and after annealing as well as on 1:1 blends of regiorandom-poly(3-hexylthiophene):PCBM. We have calculated the bimolecular recombination coefficients from the out-of-phase component of the photoinduced absorption. Annealing shows no change in the bimolecular recombination coefficients of rr-P3HT:PCBM, but the increased PA amplitude suggests that the geminate (monomolecular) recombination is reduced. In rra-P3HT:PCBM, the bimolecular recombination coefficient estimated by the same method (disregarding dispersion) is significantly smaller, indicating together with a low PA amplitude that the recombination is primarily geminate.",
keywords = "Intensity dependence, Photoinduced absorption, Recombination, Solar cells",
author = "Harri Aarnio and Ronald {\"O}sterbacka",
note = "Funding Information: Partial financial support from the Academy of Finland through projects 116995 and 135262 and the Morphoso project are acknowledged. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.; Spring 2011 E-MRS Meeting, Symposium S: Organic Photovoltaics: Science and Technology ; Conference date: 09-05-2011 Through 13-05-2011",
year = "2012",
doi = "10.1016/j.egypro.2012.11.160",
language = "English",
series = "Energy Procedia",
publisher = "Elsevier Ltd",
pages = "21--25",
booktitle = "Proceedings of the Spring 2011 E-MRS Meeting, Symposium S",
}