Preparation and evaluation of CdS film using metal-alkoxide derived fine powder

Ultra fine cadmium sulfide powder was prepared by the metal-alkoxide method. Using this powder CdS films were fabricated, and their adhesive and opto-electronic properties were evaluated, The CdS powder was synthesized by the reaction of cadmium ethoxide with hydrogen sulfide gas in toluene, The primary particle size of the powder obtained was submicron, but particles agglomerated to several microns in diameter. This CdS powder dispersed easily in the vehicle and gave a good printing paste. CdS pastes were screen-printed, dried and fired on alumina substrates, CdS films fired in air at 400-500 degrees C or in N-2 at 500-700 degrees C showed photoconductivity, The CdS him from metal-alkoxide method showed good sinterability and high adhesive strength, Especially, dense CdS films were obtained at low firing temperature, 400 degrees C in ambient atmosphere without the addition of CdCl2 flux, which is necessary in a conventional process.