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塑料染料敏化太阳能电池(DSC)由于其质量轻、形状灵活可变、适用于低成本的连续式生产而成为一种很有发展前景的光化学太阳能电池。为了提高电池的效率,在室温下用真空冷喷涂技术将亚微米级制备在TiO2纳米晶体层表面形成一层光散射层。通过研究光散射层的影响以及散射层与纳米晶TiO2层的结合以理解电池效率提高的原因。为了对比,使用乙醇中添加亚微米级Al2O3或TiO2颗粒形成的悬浮液,采用溅射沉积法,制备出两种散射层。结果显示,所有三种散射层对光的反射能力均强于TiO2纳米晶体层。无照电流结果表明NC+VCSTiO2电池的散射层与TiO2纳米晶体层连接比另外两对组合更有效。因此,由吸附在散射层粒子表面的分子所决定的光诱导电子可以有效转移到TiO2纳米晶体层,并最终输出到外电流回路。假设由于散射效应电池效率提升13%,那么散射层与TiO2纳米晶体层层之间的良好结合贡献10%,最终导致使用NC+VCS-TiO2散射层的塑料染料敏化太阳能电池效率提升~23%。此外,NC+VCS-TiO2散射层的抗弯性能优于NC+SD-TiO2和NC+SD-Al2O3电池。
Plastic dye-sensitized solar cell (DSC) is a promising photochemical solar cell because of its light weight and flexible shape, which is suitable for low-cost continuous production. In order to improve the efficiency of the cell, a sub-micron preparation of a light scattering layer was formed on the surface of the TiO2 nanocrystal layer by vacuum cold spraying at room temperature. The reasons for the increased battery efficiency are understood by studying the effect of the light scattering layer and the combination of the scattering layer and the nanocrystalline TiO2 layer. For comparison, two types of scattering layers were prepared by sputtering deposition using a suspension of ethanol added with sub-micron Al2O3 or TiO2 particles. The results show that all three scattering layers reflect light better than TiO2 nanocrystal layers. The unlicensed current results show that the scattering layer of the NC + VCSTiO2 cell is more effective than the other two pairs of combinations in connection with the TiO2 nanocrystal layer. Therefore, light-induced electrons, which are determined by the molecules adsorbed on the surface of the scattering layer particles, can be effectively transferred to the TiO2 nanocrystal layer and finally output to the external current loop. Assuming a 13% increase in cell efficiency due to scattering effects, a 10% contribution from the good combination between the scattering layer and the TiO2 nanocrystal layer ultimately leads to an ~ 23% increase in the efficiency of the plastic dye-sensitized solar cell using the NC + VCS-TiO2 scattering layer . In addition, the bending resistance of NC + VCS-TiO2 scattering layer is better than NC + SD-TiO2 and NC + SD-Al2O3 batteries.