Controlled Reduction of Sn⁴⁺ in the Complex Iodide Cs₂SnI₆ with Metallic Gallium.

ABSTRACT: Metal gallium as a low-melting solid was applied in a mixture with elemental iodine to substitute tin(IV) in a promising light-harvesting phase of Cs₂SnI₆ by a reactive sintering method. The reducing power of gallium was applied to influence the optoelectronic properties of the Cs₂SnI₆ phase via partial reduction of tin(IV) and, very likely, substitute partially Sn⁴⁺ by Ga³⁺. The reduction of Sn⁴⁺ to Sn²⁺ in the Cs₂SnI₆ phase contributes to the switching from p-type conductivity to n-type, thereby improving the total concentration and mobility of negative-charge carriers. The phase composition of the samples obtained was studied by X-ray diffraction (XRD) and ¹¹⁹S

SUBMITTER: Umedov ST 

PROVIDER: S-EPMC9919842 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature