Chloride-incorporated quasi-2D perovskite filmsviadynamic processing for spectrum-stable blue light-emitting diodes

The spectral stability remains a challenge for blue perovskite light-emitting diodes (PeLEDs) based on mixed-Cl/Br or quasi-2D perovskites. In this work, we control the redshift of the emitting luminescence (EL) peak for devices less than 2 nm.