Study on the Photoluminescence Properties of Sol-Gel Ti3+ Doped Silica Glasses

Sol-gel derived Ti3+ doped SiO2 glasses have been prepared by heat-treatment in reducing condition. A broad emission band covering entire visible-light range, with two maxiam at 460 and 560 nm, was observed in the doped reduced glasses. The emission peak at 460 nm is attributed to the defects in the sol-gel SiO2 glass network, and the one at 560 nm is assigned to the transition 2A1g → 2B2g of Ti3+ in the reduced glasses.