论文部分内容阅读
以HBr作为添加剂,通过传统一步法能够获得均匀致密的钙钛矿薄膜.HBr的加入既可提高无机部分PbI2分子在N,N-二甲基甲酰胺(DMF)中的溶解度,又能与前驱体分子和溶剂分子络合而形成中间相避免前驱体分子快速反应生成钙钛矿,所以能获得高质量的均匀致密的薄膜.以瞬态吸收测试研究钙钛矿薄膜内部的电荷转移的动力学过程,并对此给出理论解释.使用HBr作为添加剂制作的钙钛矿太阳电池的短路电流(Lsc)、开路电压(Voc)和填充因子(FF)均有提高,光电转换效率(PCE)从13.05％提高到15.88％.“,”Hydrobromic (HBr) acid is used as additive in traditional one step spin-coated method to obtain high quality perovskite films.The solubility of PbI2 in DMF can be improved and the formation of intermediate can facilitate crystallization.Through charge transfer dynamics based on transient absorption,we discuss the kinetic of charge carriers and give some reasonable interpretations.Added with HBr as additive,the short-circuit density,open-circuit voltage and fill factor of perovskite solar cells are improved distinctly,the photo conversion efficiency is increased from 13.05％ to 15.88％.