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Title: Ultrafast spectroscopic study of photoinduced electron transfer in an oligo(thienylenevinylene):Fullerene composite
Authors: Hwang, I.-W.
Xu, Q.-H. 
Soci, C.
Chen, B.
Jen, A.K.-Y.
Moses, D.
Heeger, A.J.
Issue Date: 5-Mar-2007
Citation: Hwang, I.-W., Xu, Q.-H., Soci, C., Chen, B., Jen, A.K.-Y., Moses, D., Heeger, A.J. (2007-03-05). Ultrafast spectroscopic study of photoinduced electron transfer in an oligo(thienylenevinylene):Fullerene composite. Advanced Functional Materials 17 (4) : 563-568. ScholarBank@NUS Repository.
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.
Source Title: Advanced Functional Materials
ISSN: 1616301X
DOI: 10.1002/adfm.200600267
Appears in Collections:Staff Publications

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