Rapid degradation behavior of encapsulated perovskite solar cells under light, bias voltage or heat fields

Xiaobo Zhang; Xiaoqing Chen; Yichuan Chen; Nabonswende Aida Nadege Ouedraogo; Jingjie Li; Xiulong Bao; Chang Bao Han; Yasuhiro Shirai; Yongzhe Zhang; Hui Yan

doi:10.1039/D1NA00495F

Rapid degradation behavior of encapsulated perovskite solar cells under light, bias voltage or heat fields†

Xiaobo Zhang,

^a Xiaoqing Chen,

*^b Yichuan Chen,^a Nabonswende Aida Nadege Ouedraogo,^a Jingjie Li,^a Xiulong Bao,^c Chang Bao Han,

^a Yasuhiro Shirai,

^d Yongzhe Zhang

*^b and Hui Yan^a

Author affiliations

* Corresponding authors

^a Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China

^b Key Laboratory of Optoelectronics Technology, Ministry of Education, Faculty of Information Technology, Beijing University of Technology, Beijing 100124, China
E-mail: chenxiaoqing@bjut.edu.cn, yzzhang@bjut.edu.cn

^c School of Electrical and Electronic Engineering, Beijing-Dublin International College (BDIC), University College Dublin, Ireland

^d National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, Japan

Abstract

When the power conversion efficiency (PCE) of perovskite solar cells (PSCs) rapidly approaches that of commercial solar cells, the stability becomes the most important obstacle for the commercialization of PSCs. Aside from the widely studied slow PCE degradation, the PSCs also show a unique rapid PCE degradation. Although the degradation due to oxygen and humidity can be avoided by encapsulation, that due to bias voltage, light and heat could not be effective suppressed and will lead to considerable degradation. Usually, the rapid PCE degradation is believed to be from ion migration. However, a systematic investigation is yet to be carried out. This work quantitatively and systematically investigated the relationships between external fields (bias voltage, light or heat), ion migration and device performance. By comparing the performance of reference PSCs after 90 min degradation under these fields, we conclude that (1) the electric field affects the spatial distribution of mobile ions; (2) the light field changes the mobile ion densities and drives the ion migration; (3) the heat field results in perovskite decomposition as well as changing the mobile ion densities. In addition to the analysis of the reference device, we experimentally proved that the improved device stability upon introducing phenethylammonium iodide (PEAI) or poly-methyl methacrylate (PMMA) layers originates from the inhibition of mobile ion density and migration.

Nanoscale Advances

Rapid degradation behavior of encapsulated perovskite solar cells under light, bias voltage or heat fields†

Abstract

Supplementary files

Article information

Download Citation

Permissions

Rapid degradation behavior of encapsulated perovskite solar cells under light, bias voltage or heat fields

Social activity

Search articles by author

Spotlight

Advertisements