SOLUTION GROWTH OF CUGAS2 AND CUGASE2 USING CUI SOLVENT

The phase diagrams of the CuGaS2-CuI and CuGaSe2-CuI pseudobinary systems are investigated. Both systems show eutectic behavior; liquids along the liquidus curves for solute concentrations of more than 15 mol% are shown to be single phase and solids in equilibrium with the liquids are demonstrated to be CuGaS2 and CuGaSe2 chalcopyrite compounds. On the basis of the results. bulk crystals of CuGaS2 and CuGaSe2 are prepared from CuI solutions using the Bridgman technique. The photoluminescence spectra of these crystals are nearly the same as those of the crystals grown by iodine transport method.