Experimental Validation of Strong Proton Radiation Tolerance of Surface-Treated All-Inorganic CsPbI 3 Perovskite Solar Cells for Space Applications

Hongjae Shim; Ju Won Kim; Hyunsun Song; Tommy H Richards; Mingrui He; Suyoung Jang; Jihoo Lim; Minwoo Lee; Yeeun Lee; Lei Wang; Jongsung Park; Jan Seidel; TaeWan Kim; Martin A Green; Dohyung Kim; Joo Hyung Park; Jae Sung Yun

doi:10.1021/acs.nanolett.5c05407

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Experimental Validation of Strong Proton Radiation Tolerance of Surface-Treated All-Inorganic CsPbI 3 Perovskite Solar Cells for Space Applications

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Experimental Validation of Strong Proton Radiation Tolerance of Surface-Treated All-Inorganic CsPbI 3 Perovskite Solar Cells for Space Applications

Hongjae Shim, Ju Won Kim, Hyunsun Song, Tommy H Richards, Mingrui He, Suyoung Jang, Jihoo Lim, Minwoo Lee, Yeeun Lee, Lei Wang, …

Nano letters

20/01/2026

DOI: https://doi.org/10.1021/acs.nanolett.5c05407

PMID: 41556590

Abstract

space photovoltaics

CsPbI3

radiation

proton radiation

quasi-2D perovskite

2D/3D perovskite

passivation layer

solar cells

radiation tolerance

space

The rapid expansion of space-based initiatives and the increasing deployment of satellites have intensified the demand for high-performance, radiation-tolerant photovoltaics (PV). This study investigates the radiation tolerance of all-inorganic CsPbI perovskites for space PV applications. Combining simulations and experimental evaluations, we compare the properties of CsPbI films depending on the surface treatments using long chain cations. Octylammonium iodide (OAI) treatment forms a quasi-2D perovskite structure, whereas phenethylammonium iodide (PEAI) induces a molecular cation layer. Under harsh proton irradiation (2 × 10 protons/cm at 0.05 MeV), OAI-treated devices exhibited only a 19% efficiency reduction, significantly lower than the performance degradation observed in organic-inorganic hybrid perovskite PVs. Moreover, OAI treatment does not have adverse effects after irradiation, while the PEAI layer results in a severe deviation in surface electrical potential following irradiation. These findings suggest new directions for using all-inorganic PSCs in high-radiation environments, prompting further investigation into next-generation space PV technologies.

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Title: Experimental Validation of Strong Proton Radiation Tolerance of Surface-Treated All-Inorganic CsPbI 3 Perovskite Solar Cells for Space Applications
Creators: Hongjae Shim - UNSW Sydney
Ju Won Kim - University of Seoul
Hyunsun Song - Australian Centre for Advanced Photovoltaics (ACAP), School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, NSW 2052, Australia
Tommy H Richards - Department of Electrical and Electronic Engineering, Advanced Technology Institute (ATI), University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
Mingrui He - UNSW Sydney
Suyoung Jang - Chonnam National University
Jihoo Lim - UNSW Sydney
Minwoo Lee - UNSW Sydney
Yeeun Lee - School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
Lei Wang - School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
Jongsung Park - Gyeongsang National University
Jan Seidel - School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
TaeWan Kim - University of Seoul
Martin A Green - Australian Centre for Advanced Photovoltaics (ACAP), School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, NSW 2052, Australia
Dohyung Kim - Chungbuk National University
Joo Hyung Park - Anyang University
Jae Sung Yun - University of Seoul
Publication Details: Nano letters
Publisher: AMER CHEMICAL SOC; WASHINGTON
Number of pages: 9
Publication Date: 20/01/2026
Grant note: Korea Institute of Energy Research: C4-2413 Chungbuk National University: NA National Research Foundation of Korea: RS-2023-00257494
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (RS-2024-00333809, RS-2023-00257494). This research was also conducted under the framework of the R&D program of the Korea Institute of Energy Research (C4-2413). D. K. acknowledges support by Chungbuk National University BK21 program (2025).
Identifiers: 991091018602346; WOS:001666724200001
Academic Unit: School of Computer Science & Electronic Engineering
Language: English
Resource Type: Journal article

Experimental Validation of Strong Proton Radiation Tolerance of Surface-Treated All-Inorganic CsPbI 3 Perovskite Solar Cells for Space Applications

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