Ultrafast spectroscopic study of photoinduced electron transfer in an oligo(thienylenevinylene) : Fullerene composite

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • In-Wook Hwang
  • Qing-Hua Xu
  • Cesare Soci
  • Baoquan Chen
  • Daniel Moses
  • Alan J. Heeger

Detail(s)

Original languageEnglish
Pages (from-to)563-568
Journal / PublicationAdvanced Functional Materials
Volume17
Issue number4
Publication statusPublished - 5 Mar 2007
Externally publishedYes

Abstract

Photoinduced electron transfer and competing processes have been studied in composites of an oligo(thienylenevinylene) (OTV), comprised of ten dibuthoxyl-thiophene units separated by vinylene units, and a C60 derivative, [6,6]-phenyl-C61 butyric acid methyl ester (PCBM), by using femtosecond transient absorption spectroscopy and sub-nanosecond transient photoconductivity. We find that in OTV:PCBM the photoexcitations decay primarily via intrachain relaxation rather than photoinduced electron transfer from OTV to PCBM. The electron-transfer process requires ca. 14 ps; larger by more than two orders of magnitude than the required time observed in conjugated-polymerC60 composites, and also larger than the 0.6 ps singlet-state lifetime in OTV. These observations indicate that the quantum efficiency for photoinduced electron transfer in OTV:PCBM is less than 5%. © 2007 WILEY-VCH Verlag GmbH & Co. KGaA.

Citation Format(s)

Ultrafast spectroscopic study of photoinduced electron transfer in an oligo(thienylenevinylene) : Fullerene composite. / Hwang, In-Wook; Xu, Qing-Hua; Soci, Cesare; Chen, Baoquan; Jen, Alex K.-Y.; Moses, Daniel; Heeger, Alan J.

In: Advanced Functional Materials, Vol. 17, No. 4, 05.03.2007, p. 563-568.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal