@article{Yu2023, 
author = {Wenjing Yu and Changjiang Liu and Xiaoran Sun and Tian Hou and Xin Yang and Xin Wang and Yue Yu and Kai Chen and Haijin Li and Yuelong Huang and Meng Zhang},
title = {Spontaneous relaxation of 2D passivation layer contributes to the aging-induced performance enhancement of perovskite solar cells},
year = {2023},
journal = {Nano Research},
volume = {16},
number = {1},
pages = {521-527},
keywords = {perovskite solar cell, two-dimensional (2D) perovskite, relaxation, aging, passivation},
url = {https://www.sciopen.com/article/10.1007/s12274-022-4774-8},
doi = {10.1007/s12274-022-4774-8},
abstract = {The aging-induced performance enhancement of the perovskite solar cells (PSCs) has been considered to be associated with the oxidation progress of the hole-transporting layer. Whereas the influence of the structural evolution of the passivation layer is underestimated. In this work, a spontaneous relaxation of two-dimensional (2D) passivation layer with increased n-value structure is observed, which can be accelerated under ambient atmosphere. It is demonstrated that device with relaxed 2D passivation layer exhibits reduced non-radiative recombination and optimized charge transfer property, contributing substantially to the aging-induced performance enhancement in 2D-3D heterostructured PSCs. Finally, a high fill factor of 84.15% of the devices is obtained with the relaxed 2D passivation layer, suggesting the spontaneous relaxation of 2D passivation layer is playing a key role in achieving high quality optoelectronic devices.}
}