Bimolecular recombination in regioregular and regiorandom poly(3-hexylthiophene):PCBM using photoinduced absorption spectroscopy

Harri Aarnio, Ronald Österbacka*

*Korresponderande författare för detta arbete

Forskningsoutput: Kapitel i bok/konferenshandlingKonferensbidragVetenskapligPeer review

1 Citeringar (Scopus)

Sammanfattning

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.

OriginalspråkEngelska
Titel på gästpublikationProceedings of the Spring 2011 E-MRS Meeting, Symposium S
Undertitel på gästpublikationOrganic Photovoltaics: Science and Technology
FörlagElsevier Ltd
Sidor21-25
Antal sidor5
ISBN (tryckt)9781627484404
DOI
StatusPublicerad - 2012
MoE-publikationstypA4 Artikel i en konferenspublikation
EvenemangSpring 2011 E-MRS Meeting, Symposium S: Organic Photovoltaics: Science and Technology - Nice, Frankrike
Varaktighet: 9 maj 201113 maj 2011

Publikationsserier

NamnEnergy Procedia
Volym31
ISSN (tryckt)1876-6102

Konferens

KonferensSpring 2011 E-MRS Meeting, Symposium S: Organic Photovoltaics: Science and Technology
Land/TerritoriumFrankrike
OrtNice
Period09/05/1113/05/11

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