Wavelength-Tuneable Near-Infrared Luminescence in Mixed Tin-Lead Halide Perovskites.

ABSTRACT: Near-infrared light-emitting diodes (NIR-LEDs) are widely used in various applications such as night-vision devices, optical communication, biological imaging and optical diagnosis. The current solution-processed high-efficiency perovskite NIR-LEDs are typically based on CsPbI₃ and FAPbI₃ with emission peaks being limited in the range of 700-800 nm. NIR-LEDs with longer emission wavelengths near to 900 nm can be prepared by replacing Pb with Sn. However, Sn-based perovskite LEDs usually exhibit a low efficiency owing to the high concentration of Sn-related defects and the rapid oxidation of Sn²⁺ to Sn⁴⁺, which further induces the device degradation. These problems can be solved by rationally adjusting the ratio between Pb content with Sn. Mixed S

SUBMITTER: Liu M 

PROVIDER: S-EPMC9194474 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature