[20a-W531-1~10] 12.5 Organic solar cells

△ [20a-W531-4] Changes on Surface of CH₃NH₃PbI₃ Perovskite Solar Cells Induced by Soft X-ray Irradiation

〇Motoki Keisuke^1,2, Miyazawa Yu³, Kobayashi Daisuke², Ikegami Masashi⁴, Miyasaka Tsutomu⁴, Yamamoto Tomoyuki¹, Hirose Kazuyuki² (1.Waseda Univ., 2.ISAS/JAXA, 3.Research and Development Directorate/JAXA, 4.Toin Univ. of Yokohama)

Keywords:Perovskite,X-ray,Photovoltaic

Organic-inorganic perovskite photovoltaic has been in great attention since its power conversion efficiency has been improved dramatically. Also this photovoltaic has good potential in application of X-ray detector using CH₃NH₃PbI₃ (MAPbI₃) layer as transporter of electron/hole pairs. However, the durability against soft X-ray has not been extensively investigated though it has possibilities of degradation in power conversion efficiencies when exposed to long irradiation. In the present study, we have evaluated state changes of the CH₃NH₃PbI₃ solar cell surface by an X-ray Photoelectron Spectroscopy(XPS) time-dependent measurement method, to examine the degradation by X-ray long irradiation.