To fabricate dye-sensitized solar cells (DSSCs), the variation of TiO₂ film thickness elicits contrary effects on the light-harvesting and charge transfer, thereby affecting cell performance. To compromise the TiO₂ thickness on the two effects, tandem DSSCs constructed by stacking two cells in series were proposed herein. Cells with high transparent photoelectrodes and counter electrodes were employed as the top cells; thus, the light unabsorbed by the top cells can be transmitted through, and harvested by the bottom cells. Furthermore, cobalt redox couple was adopted to decrease the light loss caused by absorption of the electrolyte. By regulating the film thicknesses of the top and bottom cells, both light harvest and charge transfer performance can be improved simultaneously, thereby, achieving a conversion efficiency as high as 33.98% under 2000 lx fluorescent lighting. This efficiency is much higher than the value (26.57%) obtained by the single cell. The tandem structure can also be applied under sunlight conditions, which can increase the efficiency from 9.27% to 11.31%.

在制备染料敏化太阳能电池（DSSCs）时，TiO ₂薄膜厚度的变化会对光捕获和电荷转移产生相反的影响，从而影响电池性能。为了妥协 TiO ₂本文提出了通过将两个电池串联堆叠构建的串联 DSSC 对这两种影响的厚度。具有高透明光电极和对电极的电池用作顶部电池；因此，未被顶部细胞吸收的光可以透过底部细胞并被底部细胞收集。此外，采用钴氧化还原电对来减少电解质吸收引起的光损失。通过调节顶部和底部电池的薄膜厚度，可以同时提高光捕获和电荷转移性能，从而在 2000 lx 荧光照明下实现高达 33.98% 的转换效率。这个效率远高于单节电池获得的值（26.57%）。串联结构也可以在阳光条件下应用，