Structural study of chalcogenide glass Se0.7Te0.3

Structural transformation on Se0.8Te0.2 chalcogenide glass

“…The refinement results of Se 0.8 Te 0.2 (hexagonal, a = 0.443 nm and c = 0.511 nm) are in good agreement with the results obtained by Afify [1,2,14], Kotkata et al [15] and Reddy et al [16].…”

“…From the radial distribution function curves, the average coordination number of the first shell, N 1 = 2.23 and second shell N 2 = 9.77 are estimated from the area under the first and the second peaks, respectively. The value of N 1 is in good agreement with that obtained by Afify [1], but the value of N 2 is in good agreement with that obtained also by Afify [19].…”

“…This means that, the amorphous structure does not have the same structure of crystalline phase. The value of the bond angle, h, is in good agreement with that obtained by Afify [1,19]. Fig.…”

“…From the G(r) curves, the average interatomic distance for the first shell, r 1 and the second shell r 2 [18][19][20][21] are deduced and are equal to 0.24 and 0.386 nm, respectively. The values of r 1 and r 2 are in good agreement with the results obtained by Afify [1,14,19]. The average value of r 1 is corresponding to Se-Te bond length (which is 0.242 nm); this means that, the first shell has only Te atoms considering Se atoms as central atoms.…”

“…Structural studies of chalcogenide glasses are very important for the better understanding of transport mechanisms [1,2]. It has been pointed out that Se-Te alloys have some advantages over amorphous Se as far as their use in xerography is concerned [3].…”