大颗粒散射层在染料敏化太阳能电池中的应用

Study of Large-Particle Scattering Layer in Dye-Sensitized Solar Cell

摘要: 以粒径在20 nm左右的小颗粒的纳米晶TiO₂作为底层的传输层，20 nm和200 nm的TiO₂颗粒按不同比例进行混合作为TiO₂散射层，实验结果表明，当20 nm的TiO₂小颗粒与200 nm大颗粒的混合比例接近1:1时，薄膜对太阳光的吸收强度最大，染料敏化太阳能电池的光电转换效率达到了最高(7.4%)。纳米晶多孔TiO₂ 薄膜电极的散射层中的不同大小颗粒纳米晶的比例会对染料敏化太阳能电池的光电性能有重要的影响，合适的大颗粒散射层有利于电池对光的吸收利用，从而提高染料敏化太阳能电池的光电转换效率。

Abstract: The transfer layer of dye-sensitized solar cells (DSSC) is 20-nm TiO₂ particles, and the scattering layer con- sists of 20-nm and 200-nm TiO₂ particles which are mixed with different ratio. The performance of DSSC with transfer layer and scattering layer would be enhanced greatly. The experimental results show that the optimal mixture ratio of 20-nm and 200-nm TiO₂ particles is 1:1. DSSC with this structure has maximal absorption and its conversion efficiency of DSSC is 7.4%. The different mixed ratio of large and small TiO₂ particles of large particles in scattering layer has great influence on the photoelectric performance of DSSC.