Halide Perovskite Light-Emitting Diode Technologies

Abstract

Halide perovskites have attracted considerable attention in next-generation solid-state lighting and displays owing to their outstanding optoelectronic properties. Over the past few years, perovskite light-emitting diodes (LEDs) have achieved high external quantum efficiencies of >20% with active layers showing photoluminescence quantum efficiencies close to unity. This paper reviews the historical breakthroughs and recent advancements in perovskite LEDs with near-infrared, red, green, and blue emission colors. Critical challenges, including device stability and material toxicity, are discussed. Finally, an outlook on white emission and lasing applications based on perovskite materials is presented.