Herein, we report the impact of light scattering mechanism on photovoltaic and photoelectrochemical performance of dye-sensitized solar cell (DSC) devices composed of TiO₂ nanoparticles and hollow cubes. DSCs are designed by two different light scattering modes (i.e., mode I in form of single layer electrode containing nanoparticles and hollow cubes and mode II in the form of double layer electrode comprising active and scattering layers made of nanoparticles and mixtures of nanoparticles and hollow cubes, respectively). The synthesized anatase-TiO₂ hollow cubes (200–400 nm) and nanoparticles (15–30 nm) are employed to enhance the optical length and light harvesting of photoanodes, respectively. Although the charge transfer resistances at Pt/electrolyte (R_Pt) and TiO₂/dye/electrolyte (R_ct) interfaces are decreased by mode I, it is not an appropriate approach for efficiency improvement of the devices due to hindering electrolyte diffusion and decreasing fill factor. In contrast, the photovoltaic performances of DSCs designed by mode II are successfully enhanced due to remarkable decrease in R_Pt and R_ct. Not only mode II improves light scattering but also it makes a balance between electron transfer and dye sensitization, leading to an increase in cell efficiency up to 9.31% compared to 7.0% for the reference device composed of pure nanoparticles.

在这里，我们报告光散射机制对由TiO ₂纳米粒子和空心立方体组成的染料敏化太阳能电池（DSC）器件的光伏和光电化学性能的影响。DSC通过两种不同的光散射模式进行设计（即，模式I为包含纳米粒子和空心立方体的单层电极形式，模式II为双层电极的形式，其包含由纳米颗粒以及纳米颗粒和空心立方体的混合物制成的活性层和散射层， 分别）。合成的锐钛矿型TiO ₂空心立方体（200–400 nm）和纳米颗粒（15–30 nm）分别用于增强光阳极的光学长度和光收集。尽管电荷转移电阻在Pt /电解质（R _Pt模式I降低了TiO ₂ /染料/电解质（R _ct）的界面，由于阻碍了电解质的扩散并降低了填充因子，因此不是提高器件效率的合适方法。相反，由于R _Pt和R _ct的显着降低，通过模式II设计的DSC的光伏性能得到了成功的增强。模式II不仅可以改善光散射，还可以在电子转移和染料敏化之间取得平衡，从而使电池效率提高了9.31％，而由纯纳米粒子组成的参考设备的电池效率提高了7.0％。