Preparation and optical properties of lamellar GaSe-ZnSe nanocomposites
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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

Preparation and optical properties of lamellar GaSe-ZnSe nanocomposites
CZU: 536.421.5+535

Pag. 61-68

Caraman Mihail1, Untila Dumitru1, Kantser Valeriu2, Evtodiev Igor1, Caraman Iuliana3, Susu Oana4, Leontie Liviu4
 
1 Moldova State University,
2 Institute of the Electronic Engineering and Nanotechnologies "D. Ghitu" of the Academy of Sciences of Moldova,
3 "Vasile Alecsandri" University of Bacau,
4 Alexandru Ioan Cuza University of Iaşi
 
 
Disponibil în IBN: 12 martie 2016


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.