Surface, interfaces, thin films

Surface-barrier structures on single crystals of CdMgMnTe quaternary solid solutions: Creation and properties

V. Yu. Rud'^a, Yu. V. Rud'^b, E. I. Terukov<sup>b

a</sup> Peter the Great St. Petersburg Polytechnic University
^b Ioffe Institute, St. Petersburg

Abstract: Planar melt crystallization is used to grow single crystals of Cd–Mg–Mn–Te quaternary alloys along the pseudobinary sections Cd$_{0.75-x}$Mg$_x$Mn$_{0.25}$Te, Cd$_{0.75-x}$Mg$_{0.25}$Mn$_x$Te, and Cd$_{1-2x}$Mg$_x$Mn$_x$Te. The first photosensitive structures, i.e., In/CdMgMnTe Schottky barriers, are fabricated within each indicated single-crystal section. The spectral dependences of the relative quantum efficiency of photoconversion are measured, and the broadband photosensitivity of the new structures is detected. Based on the spectral dependences of the photosensitivity, the nature of the meson transitions is discussed and the corresponding band gaps are determined. The applicability of grown single crystals of CdMgMnTe quaternary alloys to broadband photoconverters of optical radiations is ascertained.

Received: 22.04.2010
Accepted: 07.05.2010

 English version: Semiconductors, 2011, 45:4, 461–466

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