The influence of sintering temperature on particle size/shape and photoluminescence characteristics of CaIn2O4:xTb synthesized by combustion process

Terbium doped CaIn2O4 green phosphor was prepared by combustion synthesis and the first ever attempt to study the influence of sintering temperature upon particle size/shape, especially the effect on the photoluminescence characteristics of the same has been made in the present study. Scanning electron microscopy (SEM) investigations were carried out to understand surface morphological features and the particle size. The crystal structure and quality of phosphors sintered at different temperatures were checked by XRD. The crystal structure did not change with an increase of sintering temperature but the particle size and PL intensity increased rapidly. The sintered phosphors on excitation at 254 nm emit green luminescence with the main peak at 545 nm and the phosphor sintered at 1100 °C was having maximum PL intensity. Energy dispersive X-ray analysis (EDAX) was also carried out.