Optical and photosensitive properties of lamellar nanocomposites obtained by Cd intercalation of GaTe
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LEONTIE, Liviu, EVTODIEV, Igor, SPALATU, Nicolae, CARAMAN, Mihail, EVTODIEV, Silvia, FOCSA, Cristian, MIHAELA, Girtan, FOCSA, Cristian. Optical and photosensitive properties of lamellar nanocomposites obtained by Cd intercalation of GaTe. In: Journal of Alloys and Compounds, 2014, vol. 584, pp. 542-545. ISSN 0925-8388. DOI: https://doi.org/10.1016/j.jallcom.2013.09.113
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Journal of Alloys and Compounds
Volumul 584 / 2014 / ISSN 0925-8388

Optical and photosensitive properties of lamellar nanocomposites obtained by Cd intercalation of GaTe

DOI:https://doi.org/10.1016/j.jallcom.2013.09.113

Pag. 542-545

Leontie Liviu1, Evtodiev Igor2, Spalatu Nicolae2, Caraman Mihail2, Evtodiev Silvia2, Focsa Cristian3, Mihaela Girtan4, Focsa Cristian3
 
1 Alexandru Ioan Cuza University of Iaşi,
2 Moldova State University,
3 University of Lille,
4 Universitatea Angers
 
 
Disponibil în IBN: 7 septembrie 2023


Rezumat

By Cd-vapor heat treatment, at temperatures from 623 to 833 K, of GaTe single crystals, GaTe-CdTe composite is formed. CdTe amount is increasing together with heat treatment temperature. Absorption, photoconductivity and photoluminescence spectra of the composite contain particularities characteristic to GaTe and CdTe components. The absorption and photoconductivity edges display two thresholds at 1.66 eV (GaTe) and 1.50 eV (CdTe). Short lifetime recombination states form at the surface of composite samples, leading to narrowing of the photoconductivity bands in the high energy region, up to 1.8 eV. Widening of the absorption and photoconductivity bands in the low energy region is determined by absorption processes taking place in both GaTe and CdTe components. 

Cuvinte-cheie
Composite materials, Inorganic materials, Luminescence, optical properties, Photoconductivity and photovoltaics, Semiconductors