[20a-C302-1~11] 12.5 有機・ハイブリッド太陽電池

11:15 〜 11:30英語発表

[20a-C302-9] Vapor co-deposition of double heterostructures CsPbBr₃/CsSnBr₃/CsPbBr₃ on mica substrate

〇(M1)Yemu Yang¹, Shohei Toyota¹, Zihao Liu¹, Masato Sotome², Takashi Kondo^1,2 (1.School of Eng., Univ. of Tokyo, 2.RCAST, Univ. of Tokyo)

キーワード：

Tin halide perovskite solar cells、heterostructure、physical vapor co-deposition

Recently, metal halide perovskites (MHPs) have attracted much attention as materials for optoelectronic devices in view of their high bandgap tunability and long carrier lifetime. We have reported Type-I double heterostructure CsPbBr₃/CsSnBr₃/CsPbBr₃ on glass substrates with negligible spontaneous alloying. However, the growth on glass with relatively low substrate temperatures resulted in island-like polycrystalline thin films for the first layer, making the fabrication of double heterostructures with aligned orientations and flat interfaces difficult. In this work, we sought to employ newly cleaved mica as substrates for the growth of perovskite heterostructures. Meanwhile, the dependence of the surface morphology on the substrate temperatures, growth rates, and film thicknesses will be discussed.