ST UDIES ON PHOTOSENSIN G AND PHOTOLUMINESCE NT PROPERTIES OF SPR AY PYROLYZED C D SS E THIN FILMS

Cadmium Sulpho selenide (CdSSe) thin films were prepared by chemical spray pyrolysis technique. Cleaned non conducting glass slides were used as substrates. The precursors used were Cadmium chloride and selenourea for deposition. Various parameters to synthesize the CdSSe thin films were the surface temperatures, distance between surface nozzle and substrate heater and the pressure were op timized initially out of which substrate temperature was kept constant at 275 C + 5 C, distance between spray nozzle and heater was kept 27 cm. The as deposited thin films of CdSSe were annealed in the nitrogen atmosphere for half an hour before characterization. The nitrogen annealed thin CdSSE films were studied for Photosennsing and P hoto luminescent properties. Present investigation describes the effect of increase in incident intensity of li8ght on the CdSSE thin films. The light intensity was varied by using the incandescent bulb, maximum photosensitivity of CdSSe thin films was fou nd to obtained 42000.In Photoluminescence study the peaks observed in were in close agreement with the reported peaks of the photoluminescence spectra for CdSSe thin films.. The blue shift observed in PL emission spectra corresponds to nanocrystalline e ffect. This indicates that the nitrogen annealed CdSSe thin films Show the best photosensitivity as well as photo luminescent in nature