The lattice reconstruction of Cs-introduced FAPbI_1.80Br_1.20 enables improved stability for perovskite solar cells.

ABSTRACT: Inorganic-organic hybrid perovskite solar cells (PSCs) have stirred up a new research spree in the field of photovoltaics due to its high photoelectric conversion efficiency and simple preparation process. In recent years, the research of inorganic-organic hybrid PSCs has been widely reported, among which FA⁺/Cs⁺ PSCs are especially outstanding. However, there are few reports explaining the lattice structural change mechanism of Cs _x FA_1-x PbI_1.80Br_1.20 PSCs from the view of chemical bonds. In this work, a facile method of 15% Cs⁺ cations partially substituting FA⁺ cations has been presented to enhance the structural stability and photovoltaic performances of FAPbI_1.80Br_1.2

SUBMITTER: Chen S 

PROVIDER: S-EPMC8694282 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature