Metal halide perovskite LEDs

Abstract

Here I will review recent research trends for light-emitting diodes (LEDs) with metal halide perovskites as an emitter. Metal halide perovskite films can be fabricated by easy processes such as spin coating and vacuum deposition and have high charge carrier mobility and sharp emission spectra with color tunability. By taking these advantages inherent from both organic and inorganic semiconductors, metal halide perovskites can hold promise for display applications. Initially, perovskite LEDs showed electroluminescence only at low temperatures. Systematic optimization of the perovskite fabrication conditions and LED architectures by many researchers have increased the electron-to-photon conversion efficiencies to >20% even at room temperature.