Defect Passivation Refinement in Perovskite Photovoltaics: Achieving Efficiency over 45% under Low-Light and Low-Temperature Dual Extreme Conditions

Yajie Wang; Tinghuan Yang; Weilun Cai; Peng Mao; Yang Yang; Nan Wu; Chou Liu; Shiqiang Wang; Yachao Du; Wenliang Huang; Guangtao Zhao; Zicheng Ding; Ningyi Yuan; Jianning Ding; Yufei Zhong; Shengzhong Frank Liu; Kui Zhao

doi:10.1002/adma.202312014

Defect Passivation Refinement in Perovskite Photovoltaics: Achieving Efficiency over 45% under Low-Light and Low-Temperature Dual Extreme Conditions

Adv Mater. 2024 Feb 21:e2312014. doi: 10.1002/adma.202312014. Online ahead of print.

Authors

Yajie Wang¹, Tinghuan Yang¹, Weilun Cai¹, Peng Mao², Yang Yang¹, Nan Wu¹, Chou Liu¹, Shiqiang Wang¹, Yachao Du¹, Wenliang Huang¹, Guangtao Zhao¹, Zicheng Ding¹, Ningyi Yuan³, Jianning Ding⁴, Yufei Zhong², Shengzhong Frank Liu^{1

5}, Kui Zhao¹

Affiliations

¹ Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China.
² Zhejiang engineering research center for fabrication and application of advanced photovoltaic materials, School of Materials Science and Engineering, NingboTech University, No.1 Qianhu South Road, Ningbo, 315100, China.
³ School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center for Photovoltaic Science and Engineering, Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology, Changzhou University, Changzhou, 213164, China.
⁴ Micro/Nano Science and Technology Center, Jiangsu University, Zhenjiang, 212013, China.
⁵ Dalian National Laboratory for Clean Energy, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian, Dalian, 116023, China.

PMID: 38380583
DOI: 10.1002/adma.202312014

Abstract

Perovskite photovoltaics have emerged as the most promising candidates for next-generation light-to-electricity technology. However, their practical application still suffers from energy loss induced by intrinsic defects within the perovskite lattice. Here, a refined defect passivation in perovskite films is designed, which shows a multi-interaction mechanism between the perovskite and passivator. Interestingly, a shift of molecular bonding is observed upon cooling down the film, leading to a stronger passivation of iodine/formamidine vacancies. Such mechanism on device under low-light and low-temperature conditions is further leveraged and a record efficiency over 45% with durable ambient stability (T₉₀ > 4000 h) is obtained. The pioneer application of perovskite solar cells in above dual extreme conditions in this work reveals the key principles of designing functional groups for the passivators, and also demonstrates the capability of perovskites for diverse terrestrial energy conversion applications in demanding environments such as polar regions and outer space.

Keywords: low light and low temperature; minimal hysteresis; perovskite solar cells; shift of molecular bonding.

Abstract

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