用溶胶-凝胶法制备了Eu，Sm共掺TiO2粉体，将其与P25复合，制备了下转换光阳极，用于染料敏化太阳能电池，利用其下转换特性提高电池的光电性能.用荧光光谱对粉体的发光性能进行表征,荧光光谱显示：Eu，Sm共掺TiO2粉体受463 nm光激发可以发射550~700 nm的可见光，具有下转换功能.当Eu3+的摩尔掺杂含量为1%，Sm3+的摩尔含量为0.5%时，制备的Eu3+，Sm3+共掺下转换光阳极，短路电流达到14.08 mA/cm2，与使用Eu3+掺杂TiO2的下转换光阳极电池相比，提高了32.08%，转换效率也达到5.29%.

Eu，Sm-codoped TiO2 nanocrystals were synthesized by the sol-gel method, and the down-conversion photoanode were prepared with the matrix of P25 doped with the as-prepared Eu，Sm-codoped TiO2 powders, which was introduced into the dye-sensitized solar cell. The photoelectric properties were enhanced due to the down-conversion feature of Eu，Sm-codoped TiO2. The luminescent properties of powders were characterized by the fluorescence spectroscopy. Fluorescence spectroscopy results indicate that the Eu，Sm-codoped TiO2 powders possess down-conversion feature of converting ultraviolet light to 550~700 nm visible light exposed to 463nm ultraviolet light. The short circuit current density of the dye-sensitized solar cell with a photoanode doped with 1 mol% Eu3+ and 0.5 mol% Sm3+ reaches to 14.08 mA/cm2, which is 32.08% higher than that with Eu3+ doped TiO2 photoanode, and the efficiency is also reached to 5.29 %.