Crystal Growth and Characterization of the Solid Solutions (ZnS)1-x(CuMS2)x.

摘要

Polycrystalline samples of members of the systems (ZnS)1-x(CuMS2)x(M = Al, In or Fe) were prepared by direct combination of the elements. Single crystals have been grown by chemical vapor transport using iodine as the transport agent. They all crystallize with the zinc blende structure. Their IR transmission range is narrower than that observed for pure Zinc Sulfide, but all, except for the ZnS-CuInS2 system, still show good transmission in the long wavelength IR range. The addition of small amounts of I-III-VI2 modifies the hardness and the thermal stability of ZnS. Zinc Sulfide has been studied extensively because it offers a variety of unique device applications. ZnS crystallizes with the cubic zinc blende structure below 1020 C and with the hexagonal wurtzite structure above this phase transition temperature. The ternary chalcogenides, CuMS2(M = Al, Ga, In or Fe) crystallize with the chalcopyrite structure, which is closely related to the cubic zince blende structure. In the chalcopyrite structure, there is an ordering of Cu(I) and M(III) (M = Al, Ga, In Or Fe) which results in a doubling of the c-axis. There have been relatively few studies carried out on the preparation and characterization of solid solutions formed between ZnS and CuMS2(M = Al, Ga, In or Fe).