Optical absorption of ReS2 and ReSe2 single crystals

C. H. Ho, P. C. Liao, Y. S. Huang, Tzuen-Rong Yang, K. K. Tiong

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Abstract

The optical absorption of synthetic ReS2 and ReSe2 single crystals is reported over a temperature range from 25 to 300 K. Analysis reveals that the absorption edges of ReS2 and ReSe2 are indirect allowed transitons. The indirect band gaps at various temperatures are determined and their temperature dependence is analyzed by the Varshni equation [Physica 34, 149(1967)] and an empirical expression proposed by O'Donnel and Chen [Appl. Phys. Lett. 58, 2924 (1991)]. The parameters that described temperature dependence of energy gaps of these two materials are evaluated and discussed.

Original languageEnglish
Pages (from-to)6380-6383
Number of pages4
JournalJournal of Applied Physics
Volume81
Issue number9
DOIs
Publication statusPublished - 1997 May 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Ho, C. H., Liao, P. C., Huang, Y. S., Yang, T-R., & Tiong, K. K. (1997). Optical absorption of ReS2 and ReSe2 single crystals. Journal of Applied Physics, 81(9), 6380-6383. https://doi.org/10.1063/1.365357