Influence of chromium interaction with native and impurity defects on optical and luminescence properties of ZnSe:Cr crystals

: Radevici I, Sushkevich K, Colibaba G, Sirkeli V, Huhtinen H, Nedeoglo N, Nedeoglo D, Paturi P

Publisher: AMER INST PHYSICS

: 2013

: Journal of Applied Physics

: JOURNAL OF APPLIED PHYSICS

: J APPL PHYS

: ARTN 203104

: 20

: 114

: 20

: 11

: 0021-8979

DOI: https://doi.org/10.1063/1.4837596

Luminescent properties of the chromium doped zinc selenide crystals with various concentrations of the doping impurity in 0.03-0.30 at.% range within the temperature interval from 6 K to 300 K were studied. Chromium doping was performed in various technological processes: during the growth by chemical vapor transport method; during the growth from melt; by thermal diffusion from the Bi+Cr melt or by thermal diffusion from gas. Possibility of chromium-bound excitons formation was shown, as well as chromium impurity participation in formation of emission bands in IR spectral region. A mechanism of chromium doping impurity interaction with uncontrolled background impurities and zinc selenide structural defects was proposed based on experimental data. An assumption about resonant energy transfer between double charged chromium ions and complexes based on crystals vacancy defects was made. (C) 2013 AIP Publishing LLC.