| 초록 |
Although metal halide perovskite solar cells (MHP SCs) have great potential in applications such as flexible solar cells, building integrated photovoltaics, vehicle integrated photovoltaics, and portable power generators, the Pb component poses big problems to find applications for human-friendly power generators. Accordingly, it is a great challenge to develop efficient and stable Pb-free MHP SCs. The trivalent metal (Bi, Sb)-based MHP SCs with A3M2X9 (A = Cs, MA, and FA, M = Sb and Bi, X = Cl, Br, and I) crystal structure exhibit good air and thermal stability. However, they exhibit zero dimensional (0D) dimer structure and two dimensional (2D) layer structure. So far, the bandgaps of A3Sb2X9 perovskite materials have been narrowed by structure modification from dimer to layer structure owing to the X site mixing of I and Cl. Here, we investigated whether the bandgap of layer structured A3Sb2I6Cl3 mixed halide perovskite is controllable by A-site binary mixing of MA, FA, and Cs. |
