锡酸钡/钙钛矿的界面修饰对钙钛矿太阳能电池性能的影响  

Influence of BaSnO_(3)/perovskite interface modification on the performance of perovskite solar cells

作　　者：邵梦婷 林萍 崔灿[1] SHAO Mengting;LIN Ping;CUI Can(School of Materials Science&.Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]浙江理工大学材料科学与工程学院,杭州1310018

出　　处：《浙江理工大学学报（自然科学版）》2023年第1期50-58,共9页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：国家自然科学基金项目(11804300);浙江省自然科学基金项目(LQ18A040005)。

摘　　要：三元金属氧化物锡酸钡(BaSnO_(3))是一种高性能的电子传输层,改善电子传输层与钙钛矿吸收层之间的界面是提高电池性能的有效方法。通过旋涂法,制备镧掺杂的锡酸钡(LBSO)电子传输层,并在上层旋涂一层[6,6]-苯基-C_(61)-丁酸甲酯(Phenyl C_(61) butyric acid methyl ester, PCBM),修饰电子传输层与钙钛矿吸收层间的界面,分析PCBM层对太阳能电池器件性能的影响。结果表明:PCBM修饰界面能够改善电子传输层的表面形貌,使钙钛矿的晶粒尺寸增大,缺陷态密度减少,抑制界面的非辐射复合;PCBM的修饰能够使电子传输层与钙钛矿层的能级更加匹配,从而提高了载流子的传输效率,使器件开路电压明显提高;PCBM修饰后的器件开路电压从1.07 V提高到1.10 V,获得了17.81%的光电转换效率,且经过16 d后,电池仍能保持初始效率的89.28%。As a high-performance electron transport layer, the ternary metal oxide BaSnO_(3) can improve the interface between the electron transport layer and the perovskite absorber layer, which can effectively improve the performance of perovskite solar cells. In this paper, a PCBM layer was spin-coated on a lanthanum-doped barium stannate(LBSO) electron transport layer to modify the interface between the electron transport layer and the perovskite absorber layer, so as to investigate its effect on the performance of solar cell devices. The results have shown that the interface modification by PCBM could improve the surface morphology of the electron transport layer, increase the grain size of the perovskite and reduce the density of defect states, thus inhibit the non-radiative recombination of the interface. Moreover, the modification of PCBM could make the energy level of the electron transport layer more match with the perovskite layer, thus improve the carrier transport efficiency and significantly increase the open circuit voltage of the device. The open-circuit voltage of the final PCBM modified device was increased from 1.07 V to 1.10 V, and photoelectric conversion efficiency of 17.81% was obtained, and after 16 d, the perovskite solar cells could still maintain 89.28% of the initial efficiency.

关 键 词：[6 6]-苯基-C_(61)-丁酸甲酯 界面修饰 BaSnO_(3) 钙钛矿太阳能电池 光电性能 

分 类 号：TM914.4[电气工程—电力电子与电力传动]