High-performance pulse light stable perovskite indoor photovoltaics

Chen Li; Haoxuan Sun; Min Wang; Shan Gan; Da Dou; Liang Li

doi:10.1016/j.scib.2023.12.022

High-performance pulse light stable perovskite indoor photovoltaics

Sci Bull (Beijing). 2024 Feb 15;69(3):334-344. doi: 10.1016/j.scib.2023.12.022. Epub 2023 Dec 12.

Authors

Chen Li¹, Haoxuan Sun², Min Wang¹, Shan Gan¹, Da Dou¹, Liang Li³

Affiliations

¹ School of Physical Science and Technology, Jiangsu Key Laboratory of Thin Films, Center for Energy Conversion Materials & Physics (CECMP), Soochow University, Suzhou 215006, China.
² School of Physical Science and Technology, Jiangsu Key Laboratory of Thin Films, Center for Energy Conversion Materials & Physics (CECMP), Soochow University, Suzhou 215006, China. Electronic address: hxsun@suda.edu.cn.
³ School of Physical Science and Technology, Jiangsu Key Laboratory of Thin Films, Center for Energy Conversion Materials & Physics (CECMP), Soochow University, Suzhou 215006, China. Electronic address: lli@suda.edu.cn.

PMID: 38105158
DOI: 10.1016/j.scib.2023.12.022

Abstract

Perovskite solar cells offer great potential as a sustainable power source for distributed electronic devices that operate indoors. However, the impact of advanced lighting technology, especially the widely used pulse width modulation (PWM) technology, on perovskite photovoltaics has been ignored. Herein, for the first time in photovoltaics, we find that the light impact emitted by the PWM lighting system caused dynamic strain in perovskite thin films, induced phase separation, and accelerated the generation of metallic lead (Pb⁰) defects, leading to irreversible degradation of the cell performance after 27 h (T₈₀). To address this issue, formamidinium triiodide (FAI₃) is chosen to treat the surface of the perovskite and release residual stress, resulting in reduced lattice deformation during dynamic strain processes. Meanwhile, it suppresses harmful Pb⁰ defects and reduces V_oc loss at low light intensity. The champion device achieves impressive power conversion efficiency (PCE) of 35.14% and retains 99.5% of the initial PCE after continuous strobe light soaking for 2160 h.

Keywords: Indoor photovoltaics; Interface engineering; Micro-strain releasing; Perovskite solar cells.