| 초록 |
Since the lead halide perovskite had attracted attention due to their outstanding light absorption coefficients and long carrier lifetime. However, the toxicity and low stability of lead based perovskite provoked necessity of lead-free halide perovskite. In this work, synthesis of Cs2AgSbBr6, lead-free double perovskite, and their halide replacement by using methylammonium iodide (MAI) are studied. We identified the halide replacement of Cs2AgSbBr6 thin films by structure and color changes after MAI spin-coating. In addition, catalytical-electrical characteristic of Cs2AgSbBrxI6-x shows potential for solar cells and sensors applications. As a result, lead-free Cs2AgSbBr6 introduced solar cells demonstrates high power conversion efficiency. Moreover, Cs2AgSbBrxI6-x perovskite based sensors provided dramatic responsibility on humidity. The sensors showed excellent selectivity, sensitivity and response-recovery time. |
