Preparation and the PL properties of Er~(3+) – Ce~(3+) co-doped TiO_2 powders

摘要

The 0.5-3.0 mol% Er~(3+)-Ce~(3+) co-doped TiO_2 powders have been prepared by sintering the hybrid materials Er_(0.5)Ce_(0.5)(AA)_3phen-doped TiO_2/PMMA, which were prepared by sol-gel method, using the modified titanium (IV) n-butoxide [Ti(O-Bu)_(4-x)(AAPhen)_x] as precursors which were given by the chelate reaction between Ti(O-Bu)_4, AA and Phen at 70°C. The hybrid matrix TiO_2/PMMA improved the dispersion of Er~(3+), which caused an enhancement in the photoluminescence (PL) peak intensity at 1.53 μm of the 1 mol% Er (AA)_3phen-doped TiO_2/PMMA powders sintered at 700°C of about 23 times higher than that only had TiO_2 as its matrix. When co-doped with Ce~(3+), the above ratio of the PL peak intensity was raised to 75 times, which illustrated the obvious sensitization and dispersion effects of Ce~(3+) on Er~(3+).