Spiro-OMeTAD层氧化增强钙钛矿太阳能电池性能优化  

Property Optimization of Perovskite Solar Cells Enhanced by Spiro-OMeTAD Layer Oxidation

作　　者：蒙镜蓉 李国龙[1] 索鑫磊 张立来 苏杭 李婉 王浩 Meng Jingrong;Li Guolong;Suo Xinlei;Zhang Lilai;Su Hang;Li Wan;Wang Hao(Key Laboratory of Ningxia for Photovoltaic Materials, Ningxia University, Yinchuan, Ningxia 750021, China;Ningxia Juyuan New Material Technology Co., Ltd, Yinchuan, Ningxia 750021, China)

机构地区：[1]宁夏大学光伏材料重点实验室,宁夏银川750021 [2]宁夏巨源新材料科技有限公司,宁夏银川750021

出　　处：《激光与光电子学进展》2019年第18期253-260,共8页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61565015)

摘　　要：针对钙钛矿太阳能电池中Spiro-OMeTAD层氧化不足或氧化过度而导致器件性能较低的问题,研究了空穴层Spiro-OMeTAD氧化对器件光电性能的影响。采用4种不同的方式对空穴层进行氧化,对氧化前后空穴层薄膜的光电性能进行研究,以确定最佳的氧化方式及条件。制备了结构为ITO/SnO2/CH3NH3PbI3/Spiro-OMeTAD/Ag的平面型器件,对氧化前后器件的光电性能进行表征及对比分析。结果表明:有效的氧化方式可减少SpiroOMeTAD膜表面的针孔,使Spiro-OMeTAD膜层更加致密,提高钙钛矿太阳能电池的填充因子;氧化处理同时也降低了Spiro-OMeTAD膜层对光的寄生吸收,提升了钙钛矿太阳能电池的有效光学吸收率。此外,氧气氧化Spiro-OMeTAD前驱液的方式,优于其他三种氧化方式,由此得到的器件相比于空气氧化器件,正扫模式下填充因子由0.43增加至0.63,光电转化效率由9.06%提升至14.19%。Insufficient or excessive oxidation of the Spiro-OMeTAD layer can lead to a low efficiency of the perovskite solar cell. The effect of the hole transporting layer on Spiro-OMeTAD oxidation is investigated to solve such problem. Four different methods are primarily utilized to oxidize the hole transporting layers. Then, the optoelectrical performances of the hole transporting layers before and after oxidation are studied to determine the optimum oxidation method and its conditions. Subsequently, planar devices with a ITO/SnO2/CH3NH3Pbl3/Spiro- OMeTAD/ Ag structure are fabricated. The photoelectric properties are characterized and compared before and after oxidizing the devices. The result shows that an efficient oxidation decreases the pinholes on the surface of the Spiro- OMeTAD layer and makes it fully dense. Thus, the fill factor (FF) of the perovskite solar cell is increased. Furthermore, the oxidation treatment reduces the parasite absorption of light by the Spiro-OMeTAD layer and improves the effective optical absorptance of the perovskite solar cell. In addition, the oxygen oxidation in the Spiro- OMeTAD precursor is apparently superior to the other oxidation modes. Compared with the air-oxidized device, the FF of the oxygen-oxidized device rises from 0. 43 to 0. 63, and the photon conversion efficiency increases from 9.06% to 14.19% under the optimum operating conditions.

关 键 词：薄膜 钙钛矿太阳能电池 Spiro-OMeTAD空穴传输层 氧化 光学吸收 

分 类 号：TN365[电子电信—物理电子学]