Extension of the two-phase field in the system 2(ZnS)x(CuInS2)1−x and structural relationship between the tetragonal and cubic phase

Electronic band gap of Zn2x(CuIn)1−xX2 solid solution series (X=S, Se, Te)

“…This composition range includes the two-phase field, where a cubic phase with x = 0.42 (X = S), x = 0.36 (X = Se) and x = 0.3 (X = Te) and a tetragonal phase with x = 0.1 (X = S, Se, Te) coexists [14][15][16]. Because of the small difference between the band gap energies of the CuInX 2 -rich end of the cubic Fig.…”

“…These samples were homogenized by a further annealing of pellets in evacuated silica tubes at T = 700 • C. More details about the sample synthesis can be found in Refs. [13][14][15][16].…”

“…For long time, it was assumed that by alloying the non-isotype II-VI and I-III-VI 2 compounds, a complete or nearly complete solid solution series [10-12] is formed. Our latest investigation revealed for all three systems a broad region, where both a tetragonal and a cubic phase coexist (two-phase field) [13][14][15][16].…”

Zn2(CuIn)1−S2 photocatalysts synthesis by a hydrothermal process using H4EDTA as complexing agent

“…All grown single crystals crystallized with the cubic zincblende structure [11]. In a detailed study, G. Wagner et al [12] showed that in the 2(ZnS) x (CuInS 2 ) 1Àx system, for "x" values between 0.1 and 0.41, no solid solutions can be formed (there is a solubility gap) but a biphasic mixture is obtained. For x < 0.1, the solid solution crystallizes in the tetragonal system specific to CuInS 2 structure and for x > 0.41, the solid solution crystallizes in a cubic system specific to ZnS (sphalerite) [12].…”

“…In a detailed study, G. Wagner et al [12] showed that in the 2(ZnS) x (CuInS 2 ) 1Àx system, for "x" values between 0.1 and 0.41, no solid solutions can be formed (there is a solubility gap) but a biphasic mixture is obtained. For x < 0.1, the solid solution crystallizes in the tetragonal system specific to CuInS 2 structure and for x > 0.41, the solid solution crystallizes in a cubic system specific to ZnS (sphalerite) [12]. Guo et al reported the preparation of (CuIn) x Zn 2(1Àx) S 2 type solid solutions for all 0.01 < x < 0.5 values using a hydrothermal route with CTAB as surfactant [13].…”