The CuGaSe2-CuInSe2-2CdS system and single crystal growth of the γ-phase

Phase equilibria in the CuInSe2-CuGaSe2-2CdS system are investigated using differential-thermal analysis and phase X-ray diffraction. Isothermal section of the system at 870 K, polythermal section 'CuIn0.75Ga0.25Se2'-2CdS, and the liquidus projection in the CuInSe2-rich part have been constructed. Single crystals of the intermediate γ-solid solutions with the sphalerite structure have been grown by Bridgman method. The crystals are of the p-type conductivity, and their band gap energy varies from 1.16 to 1.32 eV.