Purification of Tin Iodide through Solid-State Reaction for Efficient Tin-Lead Mixed Perovskite Solar Cells.

ABSTRACT: Tin-lead (Sn-Pb) mixed perovskite solar cells (PSCs), which serve as the rear subcell, have achieved significant advancements, largely driving the remarkable power conversion efficiency (PCE) seen in recent all-perovskite tandem solar cells (TSCs). However, the efficiency of Sn-Pb mixed PSCs is limited by the oxidation susceptibility of Sn²⁺, which induces the formation of Sn vacancies in the perovskite thin films, leading to an increase in defect densities. To address this issue, a novel approach called metal-assisted solid-state reduction (MASSR) is introduced that effectively purifies tin iodide (SnI₂), a critical component in the fabrication of Sn-Pb mixed perovskite thin films. The MASSR process controls the oxidation state of the SnI₂, thereby reducin

SUBMITTER: Woo MY 

PROVIDER: S-EPMC12747618 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature