Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP27)
Publication date: 22nd October 2026
Perovskite solar cells (PSCs) have emerged as promising candidates for next-generation space photovoltaics owing to their high power-to-weight ratio, excellent photovoltaic performance, and potential radiation tolerance. However, their long-term reliability under rapid temperature fluctuations in low Earth orbit (LEO) remains insufficiently understood. In particular, conventional terrestrial thermal cycling protocols do not adequately represent the extreme thermal transitions encountered in orbital environments.
Here, we establish an accelerated thermal-shock (TS) testing framework based on actual LEO satellite temperature profiles and systematically investigate the composition-dependent structural stability of FAPbI₃-based PSCs. Perovskite films and devices were subjected to 100 thermal-shock cycles between −80 °C and +80 °C at a rapid ramp rate of 16 °C min⁻¹. By varying the MAPbBr₃ incorporation from 0 to 7%, we examined the influence of compositional engineering on lattice stability, phase evolution, and photovoltaic performance.
Structural characterization revealed that incorporating 5% MAPbBr₃ effectively suppresses microstrain accumulation and the formation of the undesirable δ-phase following thermal-shock exposure. Accordingly, the optimized devices retained approximately 80% of their initial power conversion efficiency after 100 cycles, whereas devices containing 1% MAPbBr₃ exhibited an efficiency loss of approximately 38%. Furthermore, high-altitude balloon testing at approximately 35 km provided complementary near-space validation under combined environmental stressors, including low atmospheric pressure, enhanced ultraviolet exposure, and temperature variations.
These findings demonstrate the critical role of compositional engineering in improving the thermal-shock resilience of PSCs and establish an accelerated testing approach for assessing their structural and operational stability. This study provides valuable insights into material design and reliability evaluation toward the practical deployment of perovskite photovoltaics in future space missions.
This work was supported by the National Research Foundation of Korea (NRF), funded by the Ministry of Science and ICT (MSIT), Republic of Korea.
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