级配光阳极中大颗粒粒径对柔性染料敏化太阳电池的性能影响

Influence of TiO_2 Particle Size on the Performance of Flexible Dye-Sensitized Solar Cells

以不同粒径的纳米晶氧化钛颗粒为原料,按照一定比例混合,制成TiO_2浆料,将其涂敷在ITO-PEN导电聚合物基板上制成光阳极薄膜。同时利用溅射法制备Pt对电极,将两者组装成三明治结构的电池器件。重点考察了级配浆料中大颗粒粒径对电池光电性能的影响,同时也研究了光阳极膜厚和电极溅射时间对电池的影响。研究发现,随着光阳极中TiO_2大颗粒粒径的增加,光阳极在可见光范围内的反射有明显提高。当膜厚为5.5μm、浆料中添加60 nm大颗粒、对电极Pt溅射时间30 s时,柔性DSC的光电性能最优。

TiO_2 film with TiO_2 nanoparticles of different sizes was prepared on a conductive indium-tin oxide(ITO)-coated polyethylene naphthalate(PEN) plastic sheet by a doctor-blade method to fabricate flexible dye-sensitized solar cells(DSC). The effect of the diameter of large particles, the thickness of TiO_2 film, as well as the sputtering time of Pt counter electrode on the photovoltaic performance of the flexible DSCs was studied. It is found that the reflection strength becomes large with the increase of the diameter of large particles. The results show that under the conditions of the Pt sputtering time of 30 s, the film thickness of 5.5 μm and the diameter of large particles of 60 nm, the flexible DSC yields the highest power conversion efficiency.