Effect of CdS nanoparticles on fluorescence from Sm3+ doped SiO2 glass

Sm3+ doped CdS nanoparticles have been prepared by sol–gel method. The effect of annealing temperatures and doping concentrations of CdS on the photoluminescence spectra of Sm3+ were studied. From the measurement of its optical absorption, three phenomenological Judd–Ofelt intensity parameters (Ω2, Ω4, and Ω6) have been computed and used to parameterize the radiative properties. The influences of CdS on Sm3+ ions were studied by fluorescence spectroscopy. The fluorescence spectra revealed that the emission intensity of samarium increased considerably in the presence of CdS nanoparticles. The evaluation of radiative properties of Sm3+ containing CdS showed that the 4G5/2→6H7/2 transition in silica matrix had the potential to be a laser transition.