Abstract
Solar cells (SCs) and thin films made of methylammonium lead tri-iodide (MAPbI3) have demonstrated remarkable robustness when irradiated with alpha (He2+) and gamma radiations from americium-241. This study investigates changes in the structure, absorption, and surface morphology of perovskite thin films, as well as the photoelectronic properties of MAPbI3 SCs, with and without irradiation with He2+. According to the XRD analysis, tetragonal MAPbI3 showed increased crystallinity and a decrease in compression micro-strain with an increased flux of He2+. UV–Vis absorption remained unchanged until the flux exceeded 7.36 x 1012 He2+ cm−2. The bandgaps for irradiated films decreased similarly to pristine films up to a dose of 3.07 x 1012 He2+cm−2, with significant differences observed beyond this point. Digital images showed significant changes in thin films irradiated at fluences exceeding 3.07 x 1012 He2+ cm−2, with pits forming in grains responsible for the changes, confirmed by scanning electron microscopy. In conclusion, this study found that MAPbI3 thin films and SCs can withstand doses of He2+ up to 3.07 x 1012 He2+ cm−2 in a He2+ radiation environment.
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