Title: Ionics of Lead Halide Perovskites: From Interface Physics to Stable Solar Cells and Modules

Speaker: 김지영 박사님 (한국과학기술연구원 (KIST))

Time and Location: September. 9th (Wed), 5-6 PM. Science Building B101

Abstract

Perovskite solar cells have surpassed the efficiency of silicon within a short time. Although hybrid lead-halide perovskites are promising candidates for next-generation photovoltaics, their commercialization remains limited by ion-induced instability. This talk discusses the ionics of lead-halide perovskites, linking fundamental mixed electronic-ionic conduction to practical device operation. We will first show how illumination enhances ionic conductivity and how this is closely related to photo-induced degradation [1]. We will then address the role of ionic and electronic defects at interfaces [2], and how precursor purity affects charge transfer, hysteresis, and stability in perovskite solar cells [3]. Finally, we will present interface engineering strategies to mitigate ion and electron-related losses at both the cell and module levels and propose directions for realizing perovskite photovoltaic devices with improved durability and efficiency [4–5].

[1] Nature Materials 17, 445-449 (2018)

[2] Advanced Functional Materials, 30, 2002426 (2020)

[3] ACS Applied Materials & Interfaces, 17, 32521-32529 (2025) 

[4] ACS Applied Materials & Interfaces, 17, 52263-52275 (2025) 

[5] Solar RRL, 8, 2301040 (2024)

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