[11p-Z11-1~14] 12.5 Organic solar cells

[11p-Z11-11] Inter-layer solid-phase reaction in halide perovskite fabricated via alternate laser deposition

Yuki Iida¹, Takahiro Shimada¹, Yuta Abe¹, Tomomasa Sato¹, 〇Nobuyuki Matsuki¹ (1.Kanagawa Univ.)

Keywords:Halide Perovskite, Solar Cells, Laser Deposition

We have developed a perovskite layer deposition process consisting of alternating layers of PbI₂ and CH₃NH₃I (MAI) by combinatorial infrared laser molecular beam deposition and have aimed at elucidating the mechanism of growth and degradation by controlling the deposition at the nanometer scale. In this study, we demonstrate the effect of the thickness variation of alternating layers of PbI₂ and MAI on the inter-layer solid-phase reaction. The X-ray diffraction results suggest that the critical thickness is in the range of 150 ~ 300 nm, where only the CH₃NH₃PbI₃ phase is formed by the inter-layer solid-phase reaction at room temperature.