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Efecte ale aportului de căldură şi al temperaturii asupra volumului şi structurii corpurilor (6) |
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SM ISO690:2012 CARAMAN, Mihail, UNTILA, Dumitru, KANTSER, Valeriu, EVTODIEV, Igor, CARAMAN, Iuliana, SUSU, Oana, LEONTIE, Liviu. Preparation and optical properties of lamellar GaSe-ZnSe nanocomposites. In: Moldavian Journal of the Physical Sciences, 2015, nr. 1-2(14), pp. 61-68. ISSN 1810-648X. |
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Moldavian Journal of the Physical Sciences | |
Numărul 1-2(14) / 2015 / ISSN 1810-648X /ISSNe 2537-6365 | |
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CZU: 536.421.5+535 | |
Pag. 61-68 | |
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Rezumat | |
ZnSe-GaSe nanocomposite plates photoluminescent in a photon energy range of 1.80−2.64 eV were obtained via exposing GaSe single-crystal plates to a Zn-vapor heat treatment at temperatures of 673−873 K. The photoluminescence spectrum is dominated by the self-activated emission band of ZnSe with a maximum at 2.04 eV. The average size of the ZnSe crystallites is ~45 nm. The absorption spectrum of the composite consists of two regions characteristic of direct optical transitions in GaSe crystals with a band gap of 1.99 eV and ZnSe crystallites with a band gap of 2.56 eV at room temperature. |
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