Short-pulsed proton irradiation stability in slot-die-coated bifacial perovskite photodetectors
Parkhomenko H.P. Yerlanuly Y. Azamat A.K. Ma C.-Q. Kaikanov M. Ng A. Jumabekov A.N.
December 2026Nature Research
Scientific Reports
2026#16Issue 1
Flexible perovskite-based photodetectors are emerging as promising candidates for next-generation optoelectronics, particularly in aerospace and radiation-intense environments. However, their stability under high-energy particle exposure remains insufficiently understood, especially for devices fabricated using scalable deposition methods. In this work, we investigate bifacial flexible perovskite photodetectors fabricated via slot-die-coating and subjected to short-pulsed (150 ns) 170 keV proton irradiation at fluences of 1012 and 5·1012 protons/cm2. The external quantum efficiency (EQE) decreased by ~ 30–40% after low-dose irradiation and by ~ 50% at higher fluence, with stronger losses observed for illumination through the MoO3/Au/MoO3 (dielectric-metal-dielectric, DMD) side. Spectral responsivity declined from 0.39 A/W (PET-side) and 0.30 A/W (DMD-side) in reference devices to 0.20 A/W and 0.16 A/W, respectively, after high-dose exposure. Similarly, peak detectivity dropped from 5.9·1011 Jones to ~ 3·1011 Jones, reflecting the combined effects of reduced charge collection and increased noise. These results demonstrate that flexible slot-die-coated bifacial perovskite photodetectors possess high radiation tolerance, highlighting the robustness of scalable device architectures for use in space, aerospace, and high-energy physics applications.
Bifacial , Flexible , Perovskite , Photodetector , Proton irradiation , Slot-die coating
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Faculty of Physics and Astronomy, Adam Mickiewicz University, Poznan, 61- 614, Poland
National Laboratory Astana, Astana, 010000, Kazakhstan
Department of Physics, School of Sciences and Humanities, Nazarbayev University, Astana, 010000, Kazakhstan
i-Lab & Printable Electronics Research Center, Suzhou Institute of Nano- Tech and Nano-Bionics, Chinese Academy of Sciences, Ruoshui Road 398, Suzhou, 215123, China
Department of Electrical and Computer Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Astana, 010000, Kazakhstan
Faculty of Physics and Astronomy
National Laboratory Astana
Department of Physics
i-Lab & Printable Electronics Research Center
Department of Electrical and Computer Engineering
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