Temperature-dependence of the refractive index and the optical transitions at the fundamental band-gap of ZnO

R. Schmidt-Grund, N. Ashkenov, M. M. Schubert, W. Czakai, D. Faltermeier, G. Benndorf, H. Hochmuth, M. Lorenz, M. Grundmann

Research output: Chapter in Book/Report/Conference proceedingConference contribution

16 Scopus citations

Abstract

We report the temperature dependencies of the fundamental band-to-band transition energies, free exciton broadening, and the below-band-gap refractive index in ZnO. Spectroscopic ellipsometry data, taken from an (0001)-oriented ZnO thin film at temperatures between 5 K and 829 K, and for photon energies from 0.75 eV to 4.5 eV, are analysed by using model dielectric functions, augmented by excitonic continuum and free exciton contributions. A strong red-shift of the three wurtzite-type Γ-point transition energies is observed.

Original languageEnglish (US)
Title of host publicationPhysics of Semiconductors - 28th International Conference on the Physics of Semiconductors, ICPS 2006, Part A and B
Pages271-272
Number of pages2
DOIs
StatePublished - 2007
Event28th International Conference on the Physics of Semiconductors, ICPS 2006 - Vienna, Austria
Duration: Jul 24 2006Jul 28 2006

Publication series

NameAIP Conference Proceedings
Volume893
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other28th International Conference on the Physics of Semiconductors, ICPS 2006
CountryAustria
CityVienna
Period7/24/067/28/06

Keywords

  • Band-to-band transition
  • Dielectric function
  • Electron-phonon interaction
  • Ellipsometry
  • Temperature dependence
  • ZnO

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Schmidt-Grund, R., Ashkenov, N., Schubert, M. M., Czakai, W., Faltermeier, D., Benndorf, G., Hochmuth, H., Lorenz, M., & Grundmann, M. (2007). Temperature-dependence of the refractive index and the optical transitions at the fundamental band-gap of ZnO. In Physics of Semiconductors - 28th International Conference on the Physics of Semiconductors, ICPS 2006, Part A and B (pp. 271-272). (AIP Conference Proceedings; Vol. 893). https://doi.org/10.1063/1.2729872