| 초록 |
For recent several years, significant progress has been successfully achieved in lead halide perovskite solar cells (PSCs), surpassing power conversion efficiency (PCE) of 22 %. Despite, toxicity issue of lead still remains for major obstacle to extend practical manufacturing production. To date, several attempts have been made to develop alternative divalent metal cation in perovskite analogues for replacing Pb2+ cation. In this work, we applied the solvent engineering process into formamidium tin iodide (FASnI3) PSC to prepare a high quality of the perovskite film by homogeneous dispersion of SnF2, thus effectively reducing the oxidation of Sn2+. Consequently, we fabricated FASnI3 PSC with high reproducibility, achieving a high power conversion efficiency of 4.8 %. Furthermore, the encapsulated device showed a good stability for over 100 days in air. |
