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https://hdl.handle.net/10356/101938| Title: | Time-resolved terahertz spectroscopy of conjugated polymer/CdSe nanorod composites | Authors: | Lam, Yeng Ming Jepsen, Peter Uhd Cooke, David G. Lek, Jun Y. Krebs, Frederik C. |
Keywords: | DRNTU::Engineering::Materials | Issue Date: | 2010 | Source: | Cooke, 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-. | Conference: | Ultrafast Phenomena in Semiconductors and Nanostructure Materials (16th : 2010 : San Francisco, USA) | Abstract: | We 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. | URI: | https://hdl.handle.net/10356/101938 http://hdl.handle.net/10220/18846 |
DOI: | 10.1117/12.840010 | Schools: | School of Materials Science & Engineering | 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. | Fulltext Permission: | open | Fulltext Availability: | With Fulltext |
| Appears in Collections: | MSE Conference Papers |
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| 9. Time-resolved terahertz spectroscopy of conjugated polymer CdSe nanorod composites.pdf | 1.16 MB | Adobe PDF |  View/Open |
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