【摘要】 电子传输层在钙钛矿太阳能电池中起着十分重要的作用,影响着最终电池的光伏性能.TiO₂是钙钛矿太阳能电池电子传输层中应用最广泛的材料之一,其储量丰富、化学稳定性较好.但是在空穴和电子的分离程度以及导电性方面还有待提高.采用溶胶-凝胶法对TiO₂进行稀土离子Gd³⁺掺杂,以此作为钙钛矿太阳能电池的电子传输层.通过XRD、SEM等对材料进行表征.结果表明:微量Gd³⁺掺杂不会影响TiO₂的晶体结构和微观形貌.通过UV-Vis、线性扫描伏安等测试对其光电性能进行表征分析.结果显示:掺杂之后TiO₂的紫外吸收强度增加、改变了TiO₂的带隙结构,促进光生电子-空穴的分离,提高了电池的短路电流密度,从而提升了器件的转化效率.此工作证明了Gd³⁺掺杂可以有效地改善钙钛矿太阳能电池的性能.更多还原

【Abstract】 The electron transport layer plays a very important role in perovskite solar cells, which affects the photovoltaic performance of the final cell.TiO₂ is one of the most widely used materials in the electron transport layer of perovskite solar cells, with abundant reserves and good chemical stability.However, the degree of separation between holes and electrons and the electrical conductivity need to be improved.The rare earth ion Gd³⁺ doped TiO₂ was used as the electron transport layer of perovskite solar cells by sol-gel method.The materials were characterized by XRD,SEM,et al.The results show that the doping of Gd³⁺ does not affect the crystal structure and microstructure of TiO₂.Its photoelectric properties were characterized by UV-Vis and linear sweep voltammetry tests.The results showed that the UV absorption intensity of TiO₂ increased after doping, the band gap structure of TiO₂ was changed, the separation of photogenerated electrons and holes was promoted, the short-circuit current density of the battery was improved and the conversion efficiency of the device was improved.This work proves that the doping of Gd³⁺ can effectively improve the performance of perovskite solar cells.更多还原