Structure and photo-electric properties of crystals PbGa<sub>2</sub>S<sub>4</sub> and PbGa<sub>2</sub>Se<sub>4</sub>
DOI:
https://doi.org/10.24144/2415-8038.1999.4.168-176Abstract
Optically homogeneous bulk crystals of PbGa2S4 and PbGa2Se4 were obtained by the Bridgmen-Stocbarger technique X-ray diffraction study confirmed them to belong rhombotedral syngony. The basic structural units of PbGa2S4 and PbGa2Se4 are [GaX4] tetrahedra and tetrahonal antiprisms [PbX8] (where X=S, Se). Complex study of electric conductivity, thermally stimulated conductivity, PC spectra, temperature dependence of photoconductivity of wide-band triple crystals of PbGa2X4 have been conducted for the first time. This allowed to reveal and to determine the main parameters of trapping centers and recombination centers.References
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