Dynamics of photoexcited carrier relaxation inC60films

Autor:	Xin-Hua Hu, E. Maiken, Peter Taborek, Tibor Juhasz, Walter E. Bron, Carlos G. Suarez
Rok vydání:	1993
Předmět:	Condensed Matter::Materials Science Nuclear magnetic resonance Materials science Fullerene Absorption spectroscopy Chemical physics Dynamics (mechanics) Relaxation (NMR) Charge carrier Trapping Physics::Chemical Physics Exponential decay Thin film
Zdroj:	Physical Review B. 48:4929-4932
ISSN:	1095-3795 0163-1829
DOI:	10.1103/physrevb.48.4929
Popis:	The relaxation of photoexcited carriers in solid C 60 films has been investigated through the measurement of their time-resolved transmissivity. A nonexponential temporal relaxation approaches an exponential decay as the ambient temperature of the sample is cooled from room temperature to 5 K. In addition, an Arrhenius-type dependence of the carrier relaxation time on the ambient temperature has been observed. This result implies that carrier trapping may play an important role in the relaxation mechanism. The dependence of the decay time on the carrier density also supports this assumption. A comparison with a simple model of the nonexponential («stretched») decay suggests that temperature-dependent structural changes of the films also influence carrier relaxation
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d2bf2e7d4de7b682049b2f20af41c426 https://doi.org/10.1103/physrevb.48.4929 Zobrazit plný text záznamu