Impeded degradation of perovskite solar cells via the dual interfacial modification of siloxane

It is challenging to improve the long-term stability of perovskite solar cells (PSCs) without sacrificing efficiency. The perovskite absorbers degrade from the film surface/interfaces, which follows entangled mechanisms that have not been fully revealed yet. Herein, we decouple and elaborate two dis...

Full description

Saved in:
Bibliographic Details
Published in:Science China. Chemistry 2022-11, Vol.65 (11), p.2299-2306
Main Authors: Zhang, Xiao, Cao, Changsu, Bai, Yang, Zhu, Cheng, Zai, Huachao, Ma, Sai, Chen, Yihua, Cui, Zhenhua, Shi, Congbo, Wang, Chenyue, Zhou, Chenxiao, Yuan, Guizhou, Gao, Ziyan, Hong, Jiawang, Dou, Jie, Wang, Hao, Zhou, Huanping, Xiao, Hai, Li, Jun, Chen, Qi
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Degradation
Efficiency
Engineering
Fourier transforms
Heat treatment
Materials science
Maximum power
Microscopy
Optoelectronics
Perovskites
Phase transitions
Photovoltaic cells
Siloxanes
Solar cells
Stability
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:It is challenging to improve the long-term stability of perovskite solar cells (PSCs) without sacrificing efficiency. The perovskite absorbers degrade from the film surface/interfaces, which follows entangled mechanisms that have not been fully revealed yet. Herein, we decouple and elaborate two distinctive pathways regarding film degradation based on FACsPbI 3 perovskites. Moreover, a dual interfacial modification strategy has been developed for improving the material’s intrinsic stability, thus leading to the film degrading in a more retardant pathway. The corresponding PSCs achieve a stable power output efficiency of 23.75%. More importantly, the unencapsulated PSCs devices retain over 93% of their initial PCE after the maximum power point (MPP) tracking under the continuous 1-sun illumination and show significantly improved stability after aged under the thermal treatment or stored in ambient atmosphere for over 1500 hours without obvious PCE decay. This work shows the importance of modulating the degradation pathway on stability improvement, and at the same time, proposes a strategy for designing perovskite-based optoelectronics with excellent performance and stability.
ISSN:1674-7291
1869-1870
DOI:10.1007/s11426-022-1381-1