甲基氯化铵提高宽带隙钙钛矿太阳电池性能的研究  

Study on Improving the Performance of Wide-bandgap Perovskite Solar Cells by Methylammonium Chloride

作　　者：孙祺 赵颖 李博研 孙瑶 黄星烨 林舒平 赵笑昆 钟大龙 SUN Qi;ZHAO Ying;LI Boyan;SUN Yao;HUANG Xingye;LIN Shuping;ZHAO Xiaokun;ZHONG Dalong(National Institute of Clean-and-Low-Carbon Energy,Beijing 102211,China;Beijing Engineering Research Center of Nano-structured Thin Film Solar Cells,Beijing 102211,China)

机构地区：[1]北京低碳清洁能源研究院,北京102211 [2]北京市纳米结构薄膜太阳能电池工程技术研究中心,北京102211

出　　处：《真空与低温》2025年第2期171-176,共6页Vacuum and Cryogenics

基　　金：国家能源投资集团有限责任公司科技创新项目(S930023048)。

摘　　要：研究甲基氯化铵(MACl)添加量对反式宽带隙钙钛矿薄膜及电池性能的影响。通过SEM、AFM、XRD、TRPL等研究发现,MACl能够改变钙钛矿薄膜晶粒尺寸和薄膜表面的粗糙度,钙钛矿薄膜结晶状态会受到MACl浓度的显著影响,不足或过量均不利于钙钛矿薄膜结晶生长。通过精确调控MACl添加量,可以有效提升钙钛矿薄膜载流子寿命和电池器件的电学性能。经过优化后的反式宽带隙钙钛矿电池效率为18.45%,各项电学性能指标均有明显提升。上述结果表明,MACl是一种促进高质量钙钛矿成膜和实现高性能器件的添加剂材料,在实际应用中具有巨大潜力。Organic-inorganic hybrid perovskite solar cells are currently a research hotspot in the field of solar energy,among which the additive engineering is one of the very promising strategies to control the crystal defects and improve the perovskite solar cell performance.Chlorine-based additives are among the most common additives found in the literature.In this work,the effect of adding methylammonium chloride(MACl)on inverted wide-bandgap perovskite films and the cell performance was systematically studied.The research results of scanning electron microscopy,atomic force microscopy,Xray diffractometer,and time-resolved fluorescence spectroscopy showed that the addition of MACl had no significant effect on the thickness of the perovskite film,but could change the grain size of the perovskite films and the roughness of the film surface.The crystallization state of the perovskite film was significantly affected by the MACl concentration,and the MACl can inhibit the growth of the secondary phases.Insufficient or excessive MACl concentration was not conducive to the crystal growth of the perovskite film.By precisely controlling the amount of MACl added,a perovskite film with good crystallization state can be obtained,which effectively improved the carrier lifetime of the perovskite film and significantly improved the electrical performance of the cell.The efficiency of the optimized inverted wide-bandgap perovskite cell was 18.45%,and all the performance indicators were significantly improved.The above results indicate that MACl is an additive material that promotes high-quality perovskite film formation and achieves high-performance devices,providing great opportunities for perovskite cells to move towards practical applications.

关 键 词：钙钛矿 宽带隙 添加剂 结晶度 

分 类 号：TB74[一般工业技术—材料科学与工程]