Metal Halide Perovskite-Based Phosphors and Their Applications in LEDs

Abstract

AbstractElectric lighting has become a significant part of human daily life, accounting for approximately 15% of global power consumption. Among various illumination, white light-emitting diodes (WLEDs) have become a major research focus of the industry due to their long lifespan and high energy efficiency. Current commercial WLEDs are fabricated mainly through utilizing blue LEDs with phosphor coatings. Under the environment of energy-saving emission reduction, according to the haitz’s law of LED industry, LED will follow the development process of aiming high brightness and low cost. Thus, exploring new phosphors for lightings, compatible with the cost reduce, is highly desired. Metal halide perovskite phosphors have attracted wide attention due to their outstanding luminescence feature and low-cost solution-processing. In this chapter, we first introduced perovskite phosphors of different colors, including three primary colors (blue, green, red), and other colors (e.g. white, yellow and orange). Then, we further summarized the stability improvement strategies of through hybrizing perovskite phosphors with inorganic materials, organic molecules and polymer, and the non-luminous perovskites and luminous perovskites. Finally, we presented some strategies of perovskite phosphor applications in WLEDs, such as by combining GaN chip with three-primary-color perovskite phosphors, through energy transfer in one perovskite, and by doping ions in perovskites.KeywordsMetal halide perovskitePhosphorsHybrid phosphorsComposite materialsLight-emitting diodesBacklightLightingDifferent colors