物理学报2024，Vol.73Issue(2)：317-326,10.DOI:10.7498/aps.73.20231299
Cs2AgBi0.75Sb0.25Br6钙钛矿太阳能电池的优化设计
Optimal design of Cs2AgBi0.75Sb0.25Br6 perovskite solar cells
王月荣 1田汉民 2张登琪 1刘维龙 1马旭蕾1
作者信息
- 1. 河北工业大学电子信息工程学院,天津 300401
- 2. 河北工业大学电子信息工程学院,天津 300401||天津电子材料与器件实验室,天津 300401
- 折叠
摘要
Abstract
Double perovskite solar cells have attracted much attention due to their low cost,high performance,environmental friendliness,and strong stability.In this study,the effect of thickness of perovskite layer,band offset,metal electrode work function,the thickness and doping concentration of the transport layer on the efficiency of Cs2AgBi0.75Sb0.25Br6 solar cells are analyzed by using Silvaco TCAD to improve device performance.This preliminary study of device based on Spiro-OMeTAD as hole transport layer(HTL)and ZnO as electron transport layer(ETL)shows that the photovoltaic conversion efficiency(PCE)is 12.66%.The results show that the efficiency gradually saturates when the thickness of the perovskite layer is greater than 500 nm.The optimal conduction band offset(CBO)ranges from 0 eV to +0.5 eV and the optimal valence band offset(VBO)from-0.1 eV to +0.2 eV.After changing the device's ETL into ZnOS and HTLs into MoO3,Cu2O and CuSCN,respectively,and optimizing their thickness values and doping concentrations,the final theoretical photovoltaic conversion efficiency of the double perovskite solar cell with an HTL of Cu2O can reach 22.85%,which is increased by 25.6%compared with the currently reported theoretical efficiency value.Moreover,the optimal efficiency is achieved when the metal electrode work function is less than-4.9 eV.This work will help find suitable materials for the transport layer and provide guidance for developing the high-performance and lead-free perovskite solar cells.关键词
双钙钛矿太阳能电池/光电转换效率/能带偏移/电极功函数Key words
double perovskite solar cell/photoelectric conversion efficiency/band offset/electrode work function引用本文复制引用
王月荣,田汉民,张登琪,刘维龙,马旭蕾..Cs2AgBi0.75Sb0.25Br6钙钛矿太阳能电池的优化设计[J].物理学报,2024,73(2):317-326,10.
