采用溶胶-凝胶法在烧结温度700℃下制备了5mol%Yb~(3+)和2 m01%Mn~(2+)共掺杂的1 m01%E~(3+)掺杂TiO2纳米发光粉。Yb~(3+)和Mn~(2+)共掺杂不改变TiO_2的相结构。在976 nm半导体激光器激发下,通过在Er~(3+)掺杂TiO_2中共掺杂Yb~(3+)和Mn~(2+)获得了明显的绿色上转换发光的选择性增强。Er~(3+)-Yb~(3+)-Mn~(2+)共掺杂TiO_2的绿色上转换发光为双光子吸收过程。研究表明Er~(3+)-Yb~(3+)-Mn~(2+)共掺杂TiO_2的绿色上转换增强来源于Yb~(3+)-Mn~(2+)聚合体的|~2F_(7/2),~4T_(1g)>能级到Er~(3+)的~4F_(7/2)有效能量能级的有效能量传递。. 1mol% TiO2 doped with 5mol% Yb3 + and 2mol% Mn2 + doped with 1m01% E ~ (3+) doped TiO2 was prepared by sol-gel method at a sintering temperature of 700 ℃ powder. Yb ~ (3+) and Mn ~ (2+) do not change the phase structure of TiO_2. Under the excitation of a 976 nm semiconductor laser, a significant enhancement of green upconversion luminescence was obtained by co-doping Yb ~ (3+) and Mn ~ (2+) into Er ~ (3+) doped TiO_2. The upconversion luminescence of Er ~ (3 +) - Yb ~ (3 +) - Mn ~ (2+) co - doped TiO_2 is a two - photon absorption process. The results show that the upconversion of Er ~ (3 +) - Yb ~ (3 +) - Mn ~ (2+) co - doped TiO_2 from the Yb ~ (3 +) - Mn ~ (2+) ~ 2F_ (7/2) ~ 4T_ (1g)> ~ 4F_ (7/2) effective energy level from Er to (3+). .