1,4-二碘苯对碘铅甲胺钙钛矿层的改性  

Modification of iodine-lead-methylamine perovskite layer with 1,4-diiodiobenzene

作　　者：郑中祥 史非 刘敬肖 李文思 刘佳磊 ZHENG Zhongxiang;SHI Fei;LIU Jingxiao;LI Wensi;LIU Jialei(School of Textile and Material Engineering,Dalian Polytechnic University,Dalian 116034,China)

机构地区：[1]大连工业大学纺织与材料工程学院,辽宁大连116034

出　　处：《大连工业大学学报》2024年第1期56-60,共5页Journal of Dalian Polytechnic University

基　　金：辽宁省教育厅高校基本科研项目(LJKZZ20220067)。

摘　　要：通过向钙钛矿前驱液中加入1,4-二碘苯钝化碘铅甲胺(MAPbI3)钙钛矿层缺陷,降低钙钛矿层的缺陷密度。利用XRD、SEM对钙钛矿薄膜的晶相组成和微观形貌进行表征,以荧光光谱及空间限制电荷电流分析对MAPbI3缺陷密度进行分析。结果表明,前驱液中引入1,4-二碘苯后缺陷密度明显降低。电化学阻抗及J-V曲线测试结果表明,相较于未引入1,4-二碘苯改性的钙钛矿太阳能电池,当钙钛矿层中1,4-二碘苯的摩尔分数为2.1%时,电池的开路电压由0.83 V提升至0.95 V,填充因子由52.5%提升至62.3%,光电转化效率由6.79%提升至8.47%,并且经过多次重复实验后性能保持稳定。Using 1,4-diiodiobenzene with different concentrations as Lewis base to passivate the defects of lead iodide methylamine(MAPbI 3)reduced the defects of calcium titanate layer.The phase and morphology of perovskite films were characterized by X ray diffraction and scanning electron microscopy.The defect density of MAPbI 3 was analyzed by fluorescence spectrum and space limited charge current analysis.The electrochemical impedance and J-V curve tests were used.The results showed that compared with the perovskite solar cell without 1,4-diiodibenzene,the defect density decreased significantly after adding 1,4-diiodiobenzene.the open-circuit voltage of the battery increased from 0.83 to 0.95 V,the filling factor increased from 52.5%to 62.3%,and the photoelectric conversion efficiency increased from 6.79%to 8.47%when the molar fraction of 1,4-diiodobenzene in the perovskite layer is 2.1%,and the results remained after multiple repeated experiments.

关 键 词：1 4-二碘苯 缺陷钝化 碘铅甲胺 

分 类 号：TB34[一般工业技术—材料科学与工程]