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Relaxation of Photogenerated Carriers in P3HT:PCBM Organic Blends
dc.contributor.author | Moehl, Thomas | |
dc.contributor.author | Kytin, Vladimir G. | |
dc.contributor.author | Bisquert, Juan | |
dc.contributor.author | Kunst, Marinus | |
dc.contributor.author | Bolink, Henk J. | |
dc.contributor.author | Garcia-Belmonte, Germà | |
dc.date.accessioned | 2014-05-05T15:11:16Z | |
dc.date.available | 2014-05-05T15:11:16Z | |
dc.date.issued | 2009 | |
dc.identifier.issn | 1864-5631 | |
dc.identifier.uri | http://hdl.handle.net/10234/91316 | |
dc.description.abstract | Relaxing in the sunlight. Long time-transient decays of photogenerated carriers in P3HT:PCBM blends for organic solar cells are interpreted in terms of the relaxation of hole carriers in a broad density of states. The after-pulse time-resolved microwave conductivity (TRMC) decays observed in P3HT:PCBM blends display a dependence on time close to t−β, independent of excitation intensity, in the 10 ns–1 μs range. This is explained in terms of the relaxation of carriers in a Gaussian density of states (DOS). The model is based on a demarcation level that moves with time by thermal release and retrapping of initially trapped carriers. The model shows that when the disorder is large the after-pulse decay of the type t−β is obtained, while at low disorder and large temperature the carrier distribution becomes independent of time. In the measurements different β values were observed depending on the solvent used for spin-coating: 0.4–0.6 for chlorobenzene and 0.3–0.4 for toluene. The model was applied to extract the shape of the DOS from the TRMC decays, giving a dispersion parameter of about 120 meV for blends with high P3HT content. | ca_CA |
dc.format.extent | 6 p. | ca_CA |
dc.format.mimetype | application/pdf | ca_CA |
dc.language.iso | eng | ca_CA |
dc.publisher | Wiley | ca_CA |
dc.relation.isPartOf | ChemSusChem, 2, 4, p. 314-320 | ca_CA |
dc.rights | Copyright © 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim | ca_CA |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | * |
dc.subject | solar cells | ca_CA |
dc.subject | charge carriers | ca_CA |
dc.subject | photochemistry | ca_CA |
dc.subject | transport | ca_CA |
dc.subject | polymer blends | ca_CA |
dc.title | Relaxation of Photogenerated Carriers in P3HT:PCBM Organic Blends | ca_CA |
dc.type | info:eu-repo/semantics/article | ca_CA |
dc.identifier.doi | http://dx.doi.org/10.1002/cssc.200900002 | |
dc.rights.accessRights | info:eu-repo/semantics/restrictedAccess | ca_CA |
dc.relation.publisherVersion | http://onlinelibrary.wiley.com/doi/10.1002/cssc.200900002/abstract | ca_CA |
dc.type.version | info:eu-repo/semantics/publishedVersion |
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