Influence of compositional variations on optoelectrical properties of Ge20Sn10Se70-xTex glass system

Variations in optical and electrical properties have been investigated by isoelectronic substitution of Te at the cost of Se in the Ge20Sn10Se70_xTex (x = 3, 6, 9, 12, and 15) system. The current study reports linear (i.e., mu, k, E-g ) as well as nonlinear (i.e., mu(2) and chi(3) ) optical transmission coefficients of as-prepared specimens. An overall increase in nonlinear parameters chi(3) and mu(2) can be observed with an increase in the Te concentration. High nonlinearity makes these glasses a prominent candidate for optical device applications. Further attempt has been made to observe the variations in conductivity with respect to temperature for amorphous Ge20Sn10Se70_xTex (x = 3, 6, 9, 12, 15) thin films using a two-probe method and hence the band structure and corresponding conduction mechanism have been investigated. (C) 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)