| Autor: |
V.E. Tezlevan, N. N. Syrbu, V. V. Ursaki, L.L. Nemerenco, V.V. Zalamai, I. M. Tiginyanu |
| Rok vydání: |
2005 |
| Předmět: |
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| Zdroj: |
Journal of Physics and Chemistry of Solids. 66:1974-1977 |
| ISSN: |
0022-3697 |
| DOI: |
10.1016/j.jpcs.2005.09.029 |
| Popis: |
Exciton spectra are studied in CuGa X In 1− X S 2 solid solutions by means of photoreflectivity and wavelength modulation spectroscopy at liquid nitrogen temperature. The exciton parameters, dielectric constants, and free carrier effective masses are deduced from experimental spectra by calculations in the framework of a model taking into account the spatial dispersion and the presence of a dead-layer. The crystal field and spin orbit valence band splitting is calculated as a function of X taking into account the energy position of excitonic lines. The energy band structure of CuGa X In 1− X S 2 and CuGa X In 1− X Se 2 compounds is derived from optical spectra at photon energies higher than the fundamental band gap. The energies of optical transitions are tabulated for X values from 0 to 1. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect