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Updated: Jan 28, 2026

Flash Infrared Annealing for Perovskite Solar Cell Processing
Published on: February 3, 2021
Operando insights into stability of perovskite-based solar water splitting devices
Chang-Seop Jeong1, Wooyong Jeong1, Juwon Yun1
1Department of Materials Science and Engineering, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul, Republic of Korea.
None:
Perovskite-based solar water splitting systems are promising candidates for addressing environmental challenges, exceeding the commercialization efficiency of solar-to-hydrogen (STH) at >10%. However, the operational stability remains suboptimal due to insufficient in situ/operando insights into charge carrier dynamics. Here, we investigate the role of charge accumulation on operational stability through operando catalytic modulation via near-infrared (NIR) toggling on a photothermal catalyst. Electrochemical analyses under operando NIR toggling demonstrate enhanced hydrogen evolution reaction kinetics and reduced charge recombination. In situ analyses confirm that reduced charge accumulation suppresses ion migration in the perovskite layer, thereby enhancing operational stability. The NIR-irradiated cathode delivers a photocurrent density of 25.48 mA cm-2, maintaining 90% of its initial photocurrent density at 0 VRHE for 310 h. A parallelly-illuminated coplanar system with NIR-irradiated perovskite-based water splitting cathode operates without bias, achieving a STH efficiency of 15.18%, retaining 70% of their initial performance for 115 h.
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