dc.contributor.authorCooke, David G.
dc.contributor.authorLek, Jun Y.
dc.contributor.authorKrebs, Frederik C.
dc.contributor.authorLam, Yeng Ming
dc.contributor.authorJepsen, Peter Uhd
dc.identifier.citationCooke, D. G., Lek, J. Y., Krebs, F. C., Lam, Y. M. & Jepsen, P. U. (2010). Time-resolved terahertz spectroscopy of conjugated polymer/CdSe nanorod composites. Ultrafast Phenomena in Semiconductors and Nanostructure Materials XIV, 7600, 76000H-.en_US
dc.description.abstractWe report ultrafast carrier dynamics in hybrid CdSe nanorod / poly(3-hexythiophene) (P3HT) bulk heterojunction films measured by time-resolved terahertz spectroscopy, and compare to the well studied P3HT/phenyl-C61-butyric acid methyl ester (PCBM) blend. Both films show an improved peak photoconductivity compared to P3HT alone, consistent with efficient charge transfer. The photoconductivity dynamics show fast, picosecond trapping or recombination in the hybrid blend while the all-organic film shows no such loss of mobile charge over ns time scales. The ac conductivity for all samples is well described by a Kramers-Kronig compatible Jonscher-type power law with exponent between 0.5 and 1 suggesting that interchain hopping in the polymer or between nanorods occurs at frequencies higher than 3 THz immediately after photoexcitation.en_US
dc.rights© 2010 SPIE. This paper was published in Proceedings of SPIE and is made available as an electronic reprint (preprint) with permission of Society of Photo-optical Instrumentation Engineers. The paper can be found at: [DOI: http://dx.doi.org/10.1117/12.840010]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.en_US
dc.titleTime-resolved terahertz spectroscopy of conjugated polymer/CdSe nanorod compositesen_US
dc.typeConference Paper
dc.contributor.conferenceUltrafast Phenomena in Semiconductors and Nanostructure Materials (16th : 2010 : San Francisco, USA)en_US
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.description.versionPublished versionen_US

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