PHOTOACOUSTIC-SPECTROSCOPY OF CUINSE2 THIN-FILMS

Polycrystalline CuInSe2 thin films grown by the three-source co-evapor ation technique are assessed near their fundamental absorption edge wi th a high resolution photoacoustic spectrometer of the gas-microphone type. The results are presented for films differing in uniformity, com position and thickness. The effect of heat treatment in various ambien ts on the properties of these films have also been investigated using in addition to photoacoustic spectroscopy, X-ray diffraction, Rutherfo rd backscattering spectroscopy and scanning electron microscopy.