Yuce Cakir, H.
, Chen, H.
, Ogunniranye, I.
, Thon, S.
, Yan, Y.
, Song, Z.
and Hamadani, B.
(2026),
Comparison of Electroluminescence and Photoluminescence Imaging of Mixed-Cation Mixed-Halide Perovskite Solar Cells at Low Temperatures, Advanced Optical Materials, [online], https://doi.org/10.1002/adom.202503522, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=960469 (Accessed September 17, 2026)
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Comparison of Electroluminescence and Photoluminescence Imaging of Mixed-Cation Mixed-Halide Perovskite Solar Cells at Low Temperatures
Published
Author(s)
, Haoran Chen, Isaac Ogunniranye, Susanna Thon, Yanfa Yan, Zhaoning Song,
Abstract
Mixed-cation mixed-halide perovskites have emerged as promising candidates for high-performance solar cells. This study investigates the temperature-dependent optoelectronic properties of Rb0.05Cs0.05MA0.05FA0.85Pb(I0.95Br0.05)3 perovskite solar cells using electroluminescence (EL) and photoluminescence (PL) hyperspectral imaging, along with current–voltage (J–V) analysis. Luminescence images, which were converted to either EL or PL external radiative efficiency (ERE) maps, revealed significant changes in the optoelectronic behavior of these devices at low temperatures, with distinct differences observed between PL and EL. Specifically, we found that a significant source of heterogeneity in the low temperature EL ERE maps below 240 K is related to local charge injection and extraction bottlenecks, whereas PL ERE maps show suppressed non-radiative recombination and significant improvements in efficiency throughout the investigated temperature range. Both dark and light J-V characterization support the luminescence findings. The spatial distribution of ERE across the entire device and its variation with applied current were analyzed, offering insights into charge-carrier dynamics and defect behavior. Our results reveal that while the perovskite layer exhibits enhanced radiative efficiency at low temperatures, charge injection barriers at the interfaces of the perovskite solar cells significantly suppress electroluminescence and degrade the fill factor below 240 K. These findings provide a deeper understanding of the performance of mixed-cation mixed-halide perovskite solar cells under low-temperature conditions as an essential step toward their potential application in space power systems and advanced semiconductor devices.Citation
Advanced Optical Materials
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Journals
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Keywords
perovskite solar cell, hyperspectral imaging, electroluminescence, photoluminescence, charge injection
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Created February 16, 2026, Updated September 16, 2026