Large-area and efficient perovskite light-emitting diodes via low-temperature blade-coating.

ABSTRACT: Large-area light-emitting diodes (LEDs) fabricated by mass-production techniques are needed for low-cost flat-panel lighting. Nevertheless, it is still challenging to fabricate efficient large-area LEDs using organic small molecules (OLEDs), quantum dots (QLEDs), polymers (PLEDs), and recently-developed hybrid perovskites (PeLEDs) due to difficulties controlling film uniformity. To that end, we report sol-gel engineering of low-temperature blade-coated methylammonium lead iodide (MAPbI₃) perovskite films. The precipitation, gelation, aging, and phase transformation stages are dramatically shortened by using a diluted, organoammonium-excessed precursor, resulting in ultra-flat large-area films (54 cm²) with roughness reaching 1 nm. The external quantum efficiency of do

SUBMITTER: Chu S 

PROVIDER: S-EPMC7794572 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature