PULSED ELECTRIC FIELD-INDUCED NH3 POST-TREATMENT STRATEGY FOR PEROVSKITE SOLAR CELLS

Li Haifang; Zhu Pengkun; Zhang Zhiyu; Xu Teng; Fan Bingbing; Li Meicheng

doi:10.19912/j.0254-0096.tynxb.2025-0629

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (8) : 225-234. DOI: 10.19912/j.0254-0096.tynxb.2025-0629

PULSED ELECTRIC FIELD-INDUCED NH₃ POST-TREATMENT STRATEGY FOR PEROVSKITE SOLAR CELLS

Li Haifang^1,2, Zhu Pengkun¹, Zhang Zhiyu¹, Xu Teng¹, Fan Bingbing^1,2, Li Meicheng^1,2

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Abstract

A pulsed electric field-induced NH₃ post-treatment is proposed for passivating the surface of perovskite films. Under the induction of pulsed electric fields, N atoms in NH₃ molecules interact with uncoordinated Pb²⁺ sites in the [PbI₆]^4- octahedral framework on the perovskite surface, stabilizing Pb²⁺-related defects. Simultaneously, the pulsed electric field enhances the interaction between H atoms in NH₃ and the I^- ions, thereby suppressing the migration of iodine and reducing the formation of iodine vacancies. After the pulsed electric field-induced NH₃ modification, the surface potential distribution of the modified perovskite film becomes more uniform, leading to improved charge carrier transport. As a result, the average power conversion efficiency （PCE） of the devices increases from 23.32% to 24.79%. After aging at ambient condition for 1000 hours without encapsulation, the NH₃-treated devices subjected to the pulsed electric field retain 84% of their initial PCE, which is significantly higher than the 75% retained by the control counterparts.

Key words

perovskite solar cells / defect state / ammonia / electric-field regulation / gas-phase assisted approach / post-treatment

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Li Haifang, Zhu Pengkun, Zhang Zhiyu, Xu Teng, Fan Bingbing, Li Meicheng. PULSED ELECTRIC FIELD-INDUCED NH₃ POST-TREATMENT STRATEGY FOR PEROVSKITE SOLAR CELLS[J]. Acta Energiae Solaris Sinica. 2026, 47(8): 225-234 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0629

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