An investigation of structural, thermo-physical, and photoelectric properties of glassy As₂Se₃–Tl₂Te₃ alloys

Glass formation and the nature of the chemical interaction in the As 2 Se 3 –Tl 2 Te 3 system were studied by differential-thermal (DTA), X-ray phase (XRD), microstructural (MSA) analysis. Based on the performed experiments T-x phase diagram is constructed. It is established that the phase diagram of the system is a partially quasi-binary section of the quaternary system Tl,As//Se,Te. Eutectic equilibrium and peritectic transformation process occur in the system. When the ratio of As 2 Se 3 and Tl 2 Te 3 components is 1:1, a new quaternary compound Tl 2 As 2 Se 3 Te 3 is formed. It has been established that the Tl 2 As 2 Se 3 Te 3 compound melts with an open maximum at 568[Formula: see text]K and crystallizes in a hexagonal symmetry. In the system, under normal cooling, the glass formation area reaches −80[Formula: see text]mol.% Tl 2 Te 3 , and in the mode of quenching in liquid nitrogen up to −100[Formula: see text]mol.% T1 2 Te 3 . The photoelectric properties of glassy alloys (As 2 Se[Formula: see text](Tl 2 Te[Formula: see text] ([Formula: see text]; 0.3; 0.05) have been studied. Depending on the Tl 2 Te 3 concentration of the system, the observed changes in the photoelectric properties and calculated parameters are presented.