Cs_(2)TiX_(6)(X=Br^(−),I^(−),F^(−)和Cl^(−))基太阳电池性能分析  

Performance analysis of Cs_(2)TiX_(6)(X=Br^(−),I^(−),F^(−)and Cl^(−))based solar cells

作　　者：甘永进 方昌敢 潘美娣 马浩伦 GAN Yongjin;FANG Changgan;PAN Meidi;MAHaolun(School of Physics and Telecommunication Engineering,Yulin Normal University,Yulin Guangxi 537000,China;Office of Academic Research,Wuzhou University,Wuzhou Guangxi 543003,China)

机构地区：[1]玉林师范学院物理与电信工程学院,广西玉林537000 [2]梧州学院科研处,广西梧州543003

出　　处：《电源技术》2023年第11期1495-1500,共6页Chinese Journal of Power Sources

基　　金：广西自然科学基金青年基金项目(2019GXNSFBA245076);广西光电信息处理重点实验室基金项目(GD21101);广西高校中青年教师科研基础能力提升项目(2022KY0580);2022年玉林师范学院大学生创新创业训练计划项目(202210606018;S202210606155)。

摘　　要：以SCAPS为仿真平台,构建结构为FTO/LBSO/Cs_(2)TiX_(6)/CuSbS_(2)/Au的钙钛矿太阳电池,其中X分别为Br^(−),I−,F^(−)和Cl^(−)。仿真结果表明,Cs_(2)TiBr_(6)带隙较小,和载流子传输层有较佳的能级匹配,以Cs_(2)TiBr_(6)为吸收层的电池输出最高的PCE;增加吸收层厚度促进电池对光子的吸收,产生更多的光生载流子,促进Jsc提升。但随着厚度不断增加,载流子复合得到增强,电池性能提升速度变缓;增加吸收层缺陷态密度,使器件内部载流子复合中心增多,降低电池性能;金属背电极与空穴传输层之间形成肖特基接触会阻碍空穴的运动及收集,对电池性能有抑制作用。Perovskite solar cells which structures were FTO/LBSO/Cs_(2)TiX_(6)/CuSbS_(2)/Au were proposed based on SCAPS,where X was Br−,I−,F−and Cl^(−)respectively.The simulation results show that Cs_(2)TiBr_(6)has a small band gap and a better energy level matching with the carrier transport layers.Therefore,the highest PCE is obtained by Cs_(2)TiBr_(6)-based solar cell.The increase of thickness of the absorption layer can promote the absorption of photons,and more photo-generated carriers are generated,and Jsc is enhanced.But as the thickness increased,the carrier recombination is enhanced,and the performance improvement speed is inhibited.With the increase of the defect density in the absorption layer,the number of carrier recombination centers increases and the cell performance decreases.The Schottky contact between the metal back electrode and the hole transport layer hinder the movement and collection of holes,resulting in the poor performance.

关 键 词：钙钛矿太阳电池 能级 厚度 缺陷态密度 金属背电极 

分 类 号：TM914.4[电气工程—电力电子与电力传动]