Phase Behavior and Role of Organic Additives for Self-Doped CsPbI₃ Perovskite Semiconductor Thin Films.

ABSTRACT: The phase change of all-inorganic cesium lead halide (CsPbI₃) thin film from yellow δ-phase to black γ-/α-phase has been a topic of interest in the perovskite optoelectronics field. Here, the main focus is how to secure a black perovskite phase by avoiding a yellow one. In this work, we fabricated a self-doped CsPbI₃ thin film by incorporating an excess cesium iodide (CsI) into the perovskite precursor solution. Then, we studied the effect of organic additive such as 1,8-diiodooctane (DIO), 1-chloronaphthalene (CN), and 1,8-octanedithiol (ODT) on the optical, structural, and morphological properties. Specifically, for elucidating the binary additive-solvent solution thermodynamics, we employed the Flory-Huggins theory based on the oligomer level of additives' molar ma

SUBMITTER: Kebede T 

PROVIDER: S-EPMC10456489 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature