講演情報
[19p-P04-45]High Stable Perovskite Solar Cell Utilizing Vacuum Deposited RbI Intercalation Technology
〇(M2)Neng Hani Handayani1, M. Shahiduzzaman1, Y. Higashi2, M. Nishimoto2, M. Nakano1, M. Karakawa1, J. M. Nunzi1, T. Taima1 (1.Kanazawa Univ., 2.Iwatani Ind. Co.,Ltd)
キーワード：
Perovskite、RbI、Intercalation technology
Hybrid organic-inorganic metal halide perovskite solar cells (PSCs) are promising and rapidly advancing technology in the field of photovoltaics that achieved a power conversion efficiency (PCE) of 25.8%. Methylammonium lead halide (MAPbI3) is the most used active layer for PSCs due to excellent charge mobility, tunable bandgap, low-temperature solution process, and low cost. However, the high sensitivity of MAPbI3 to ambient air causes this material to have poor stability and easily decomposes into PbI2, MAI, and HI when exposed to moisture, light, and heat. The stability of perovskite is related to the A-site which is generally an organic compound, MA+ or (CH3NH3+). To improve the stability, a partial or complete substitute of organic compounds with more stable inorganic compounds such as Cesium (Cs) and Rubidium (Rb) was required. However, the solution method that is commonly used for depositing perovskite has drawbacks for dissolving inorganic compounds in solvents leading to difficulty in controlling elemental compositions. To overcome this problem, previously we succeeded in developing CsI intercalation technology into the MAPbI3 framework which precisely controls elemental composition resulting in dense, pinholes-free, and bigger grain size of perovskite film and better optoelectronic properties leading to higher efficient and stable perovskite solar cells. RbI has a promising future to intercalate into MAPbI3 because it is cheaper, and less harmful than CsI. In terms of ionic radius, Rb+ (1.61 Å) is smaller than Cs+ (1.74 Å) resulting in a better intercalation degree. In this study, we introduced the vacuum-deposited RbI intercalation technology into MAPbI3 and investigated its effects on PSCs’ stability and performance.