Materials with layered structures XI: X-ray powder diffraction investigations in the systems CuIn5S8-CuIn5Se8 and AgIn5S8-AgIn5Se8

Annealing effects on the structural and optical properties of AgIn5S8 thin films

“…The very slight decrease in the value of the lattice constant as annealing temperature is raised may be attributed to the re-orientation of the crystallites in the preferable direction. The values still strongly agree with that reported for thin film and single crystals as well [6][7][8]11,12].…”

The quasi-ternary system Cu2Se–CdSe–In2Se3 and the crystal structure of the Cu0.6Cd0.7In6Se10 compound

“…The Se atoms of every block are stacked in a close-packed arrangement with layers in the sequence ABCBC. The packing of cation-centered tetrahedra and octahedra in the structures of the Cu 0.6 Cd 0.7 In 6 Se 10 (Z = 1) and Fe 2 Ga 2 S 5 [4] (Z = 2) compounds are shown in Fig. 11.…”

Thin films of AgIn5(S/Se)8 prepared in a two stage process

“…AgIn 5 Se 8 has been synthetized from the elementary components at 1200 K in a quartz evacuated ampoule and subsequently annealed at 820 K for 300 h [14]. Alloys of AgIn 5 S 8-x Se x have been prepared by sintering stoichiometric mixtures of the binary compounds Ag 2 S and Ag 2 Se disposed at 773 K from the elements; and In 2 S 3 and In 2 Se 3 disposed at 1073 K from the elements, in evacuated and sealed silica ampoules at 1073 K and heated for 72 h at 1073 K [15]. Yiyun et al [4] obtained a single phase of AgIn 5 Se 8 by spark plasma sintering technique.…”

“…Also, conductivity activation energies of 155 and 78 meV, in the temperature regions of 230-300 K and 90-220 K, respectively; and a density of localized states of 1.17 9 10 20 cm -3 eV -1 , were reported [23]. On the other hand, previous work on ternary AgIn 5 Se 8 compound and AgIn 5 S 8 -AgIn 5 Se 8 system have been focused in structural and compositional analysis [4,14,15]. Seebeck coefficients for spark plasma sintering AgIn 5 Se 8 are negative, which indicates that the majority of charge carriers are electrons (n-type) [5].…”