| Conţinutul numărului revistei |
| Articolul precedent |
| Articolul urmator |
 96 0 |
 SM ISO690:2012VATAVU-CUCULESCU, Elmira, EVTODIEV, Igor, CARAMAN, Iuliana. The anisotropy of the optical properties of ternary semiconductors formed by elements of III and VI groups. In: Physica Status Solidi (C) Current Topics in Solid State Physics, 2009, vol. 6, pp. 1207-1212. ISSN 1862-6351. DOI: https://doi.org/10.1002/pssc.200881212 |
| EXPORT metadate: Google Scholar Crossref CERIF DataCite Dublin Core |
 Physica Status Solidi (C) Current Topics in Solid State Physics |
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| Volumul 6 / 2009 / ISSN 1862-6351 /ISSNe 1610-1642 | ||||||
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| DOI:https://doi.org/10.1002/pssc.200881212 | ||||||
| Pag. 1207-1212 | ||||||
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| Rezumat | ||||||
The GaSxSe1-x and GaSexTe1-x single crystals with the composition parameter x in the range of 0 ≤ x ≤ 0.3 and 0.7 ≤ x ≤ 1 respectively have been obtained. The absorption and photo-luminescence (PL) measurements have been carried out for two polarizations: E||C and E⊥C (E is the electrical field vector of light wave and C is the crystallographic axis normal to the cleaved plane). The anisotropy of optical absorption reveals itself on the low energy wing of the n=\ free exciton band. The anisotropy coefficient increases with the temperature decrease. The edge of the absorption band is determined by direct n=1 excitons for E ⊥ C polarization and by indirect transitions at low absorption coefficient for E||C polarization. The photo luminescence spectra of GaS 0.2Se0.8 crystals at 78 K in E||C and E||C polarizations are identical to those of GaSe. The high energy photo-luminescence band is determined by the radiative emission of direct bounded excitons. |
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| Cuvinte-cheie Anisotropy, crystallography, Excitons, Gas absorption, light, Luminescence, optical properties, polarization, Semiconducting selenium compounds |
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