| 研究開始時の研究の概要 |
Phase instability, caused by moisture, is the main barrier in developing CsPbI3 solar cells. P-type inorganic BiOX (X=I, F, Cl, Br) are very stable against moisture and heat. This project will focuse on constructing an ultra-thin BiOX layer to protect CsPbI3. The preparation of BiOX on CsPbI3 will be explored, including optimizing the solvents, spin-coating and annealing process. The bonding between perovskite and BiOX, the hole transfer through interface will be studied. The BiOX compounds will be compared to clarify the effect of halide ions on the device performance and stability.
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