Surface chemical polishing and passivation minimize non-radiative recombination for all-perovskite tandem solar cells.

ABSTRACT: All-perovskite tandem solar cells have shown great promise in breaking the Shockley-Queisser limit of single-junction solar cells. However, the efficiency improvement of all-perovskite tandem solar cells is largely hindered by the surface defects induced non-radiative recombination loss in Sn-Pb mixed narrow bandgap perovskite films. Here, we report a surface reconstruction strategy utilizing a surface polishing agent, 1,4-butanediamine, together with a surface passivator, ethylenediammonium diiodide, to eliminate Sn-related defects and passivate organic cation and halide vacancy defects on the surface of Sn-Pb mixed perovskite films. Our strategy not only delivers high-quality Sn-Pb mixed perovskite films with a close-to-ideal stoichiometric ratio surface but also minimizes the non-radiat

SUBMITTER: Pan Y 

PROVIDER: S-EPMC11347601 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature