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The CdS nanoparticles along with Eu(3+) ions were embedded in silica xerogel by sol gel technique. The samples were studied by TGA, DTA and fluorescence techniques. The result suggested that doping of CdS nanoparticles enhanced the luminescence properties of Eu(3+) even in the gel stage itself and this avoids the need of heating gel at higher temperature. The effects of CdS nanoparticles on the Eu(3+) luminescence were discussed.

CdS nanoparticles doped with Tb 3+ were synthesized by sol-gel technique. The influence of CdS on the Tb 3+ glass was studied by UV-Visible and luminescence spectroscopy. The luminescence intensity of the glasses increased significantly in the presence of CdS nanoparticles. Terbium ions excited into the 5 D 3 level have a rich emission spectrum in the 400-700 nm range decaying to different 7 F J levels. The intensity of violet and blue luminescence from 5 D 3 level is highly dependent on Tb 3+ concentration, on presence of CdS co-dopant and annealing conditions.

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