CL AND EL PROPERTIES OF BLUE-EMITTING SRGA2S4-CE THIN-FILMS PREPARED BY MULTISOURCE DEPOSITION

SrGa2S4:Ce films for blue-emitting thin-film EL devices have been prep ared by multi-source deposition. It is found that when Ga2S3 evaporate s from the source, it decomposes into GaS and S-2. Therefore, reaction s between Sr, GaS and S-2 should be considered in the deposition proce ss. It was found that the formation of SrGa2S4, SrS or GaS depends str ongly on the substrate temperature and Ga2S3/Sr. The SrGa2S4:Ce him sh owing blue luminescence was deposited at a substrate temperature of 45 0 degrees C and the flux ratio > 40.