Structural and photoluminescence study of the quaternary alloys system CuIn(SxSe1-x)(2)

The full composition range CuIn(SxSe1-x)(2) alloy system has been studied u sing 40 mm length crystal cuts from 10 mm diameter ingots grown by the clas sical Bridgman method. X-ray diffraction diffractographs show that the CuIn (SxSe1-x)(2) compounds have a chalcopyrite structure for each composition x , they exhibit an expansion on the unit cell characteristics by the tetrago nal distortion which depends linearly on the electronegativity of the atoms . The photoluminescence spectra is investigated as a function of various co mpositions, temperature and excitation intensities. Photoluminescence spect ra shows a wide variation in the dominant peak location and an overall blue shift with the increase of sulphur content, Photoluminescence CuInS2 and C uIn(S0.72Se0.28)(2) have been studied in detail. (C) 2000 Elsevier Science B.V. All rights reserved.