Addition effects of halogen compounds on electron transport properties of lead-free perovskite solar cells
Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists
Date (from‐to) : 2018/04 -2021/03
Author : SHIRAHATA Yasuhiro
In this research, the effects of annealing temperature on photovoltaic properties of (CH3NH3)3Bi2I9 solar cells, one of the lead-free perovskite solar cells, were investigated. As a result, the (CH3NH3)3Bi2I9 photovoltaic cell annealed at 130 ℃ showed the highest conversion efficiency in the present research. Moreover, the iodide(I)/bismuth(Bi) ratio of the (CH3NH3)3Bi2I9 photoactive layers was investigated, and the highest I/Bi ratio was obtained at the annealing temperature of 130 ℃. These results indicate that it is necessary to obtain (CH3NH3)3Bi2I9 with a high I/Bi ratio to improve the conversion efficiency of (CH3NH3)3Bi2I9 solar cells.