添加高沸点溶剂对电子传输层形貌和钙钛矿太阳能电池性能的影响  

Effect of Adding High Boiling Point Solvent on Morphology of Electron Transport Layer and Performance of Perovskite Solar Cells

作　　者：刘冠辰 曾倩倩 秦志远 柳志海 谢小银 卢小菊 LIU Guanchen;ZENG Qianqian;QIN Zhiyuan;LIU Zhihai;XIE Xiaoyin;LU Xiaoju(School of Chemistry and Chemical Engineering,Hubei Polytechnic University,Huangshi 435300,China;School of Physics and Optoelectronics,Yantai University,Yantai 264005,China)

机构地区：[1]湖北理工学院化学与化工学院,湖北黄石435300 [2]烟台大学物理与光电子学院,山东烟台264005

出　　处：《化学与生物工程》2024年第10期64-68,共5页Chemistry & Bioengineering

基　　金：国家自然科学基金面上项目(22373033)。

摘　　要：采用添加高沸点溶剂(1,8-辛二硫醇)的方法来控制钙钛矿太阳能电池电子传输层PCBM的形貌,并通过原子力显微镜照片、稳态荧光光谱、紫外可见吸收光谱、电导率、伏安曲线、单色光光电转换效率曲线研究了高沸点溶剂对PCBM形貌和钙钛矿太阳能电池性能的影响。结果表明,添加3%的1,8-辛二硫醇,PCBM薄膜拥有更加平整均匀的表面形貌,方均根粗糙度从7.5 nm大幅降低到了3.2 nm,从而有利于降低钙钛矿太阳能电池内部的接触电阻和提高电子的传输能力;钙钛矿太阳能电池的平均光电转换效率从对照组的(12.5±0.3)%显著提高到了(15.1±0.3)%,开路电压、短路电流密度和填充因子均有一定的提升。表明,在PCBM前驱液中添加少量的高沸点溶剂1,8-辛二硫醇有利于控制PCBM的形貌和提高钙钛矿太阳能电池的性能。In this study,we controlled the morphology of the electron transport layer PCBM in perovskite solar cells by adding a high boiling point solvent(1,8-octanedithiol).Moreover,we studied the influence of high boiling point solvent on the morphology of PCBM and the performance of perovskite solar cells through atomic force micrograph,steady-state fluorescence spectrum,UV-visible absorption spectrum,conductivity,voltammetric curve,and monochromatic incident photo-to-electron conversion efficiency curve.The results show that the addition of 3%1,8-octanedithiol can result in a smoother and more uniform surface morphology of PCBM,with a significant reduction in root mean square(RMS)roughness from 7.5 nm to 3.2 nm,which is beneficial for reducing the internal contact resistance and improving the electron transfer ability of perovskite solar cells.The average incident photo-to-electron conversion efficiency of perovskite solar cells significantly increases from(12.5±0.3)%in the control group to(15.1±0.3)%,and the open-circuit voltage,short-circuit current density,and fill factor of perovskite solar cells all increase.The research results indicate that adding a small amount of high boiling point solvent 1,8-octanedithiol into PCBM precursor solution is beneficial for controlling the morphology of PCBM and improving the performance of perovskite solar cells.

关 键 词：钙钛矿太阳能电池 高沸点溶剂 形貌控制 光电转换效率 

分 类 号：O472[理学—半导体物理] TM914.4[理学—物理]