The Defect Passivation of Tin Halide Perovskites Using a Cesium Iodide Modification.

ABSTRACT: Tin-based perovskites are promising for realizing lead-free perovskite solar cells; however, there remains a significant challenge to achieving high-performance tin-based perovskite solar cells. In particular, the device fill factor was much lower than that of other photovoltaic cells. Therefore, understanding how the fill factor was influenced by device physical mechanisms is meaningful. In this study, we reported a method to improve the device fill factor using a thin cesium iodide layer modification in tin-based perovskite cells. With the thin passivation layer, a high-quality perovskite film with larger crystals and lower charge carrier densities was obtained. As a result, the series resistance of devices was decreased; the shunt resistance of devices was increased; and the non-radiati

SUBMITTER: He L 

PROVIDER: S-EPMC10490360 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature