Abstract
In article number 2006722, Jianjun Tian and co-workers report pure-blue perovskite light-emitting diodes (LEDs) based on ultralow-trap-density and extremely stable small-sized CsPbBr3 quantum dots, which is achieved by a novel acid-etching-driven ligand exchange. The LEDs exhibit electroluminescence at 470 nm wavelength with external quantum efficiency of 4.7%, remarkable high luminance (3850 cd m−2), and long-term operational stability T50 of 12 h.
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