摘要
The interface properties of organic–inorganic mixed halide perovskite solar cells play a significant role in their photovoltaic performance.Defect states at the interface can decrease the power conversion efficiency through defect-assisted charge recombination and degrade the long-term stability.Low-dimensional perovskites exhibit excellent stabilities.They can be combined with three dimensional(3D)perovskites to utilize their advantages for fabrication of highperformance devices.In this study,we successfully construct a robust interface for perovskite films through mixed-dimensional engineering.After the introduction of a one dimensional(1D)-structured capping layer on the 3D perovskite through post-treatment,the number of defect states in the perovskite film is significantly decreased,while the lifetime of the photocarriers is increased.In addition,the 1D capping layer can serve as a diffusion barrier to reduce the ion migration and protect the vulnerable 3D perovskite against moisture.Perovskite solar cells based on stacked 1D/3D structures exhibit a power conversion efficiency of 23.3%and maintain 80%of the initial efficiency after storage for over 800 h under ambient conditions with a humidity of 50%.Their performances are superior to those of the 3D devices.This study provides a simple approach to simultaneously enhance the efficiency and stability of perovskite solar cells and may guide the development of other solar cells.
出处
《InfoMat》
SCIE
CAS
2022年第5期187-195,共9页
信息材料（英文）
基金
National Natural Science Foundation of China,Grant/Award Numbers:51972218,52025028,52172220
Priority Academic Program Development(PAPD)of Jiangsu Higher Education Institutions
Six Talents Peak Project of Jiangsu Province
333 High-level Talents Cultivation Project of Jiangsu Province
1000 Youth Talents Plan。
