Perovskite light-emitting diodes

Light-emitting diodes based on halide perovskites have undergone rapid development in recent years and can now offer external quantum efficiencies of over 23%. However, the practical application of such devices is still limited by a number of factors, including the poor efficiency of blue-emitting devices, difficulty in accessing emission wavelengths above 800 nm, a decrease in external quantum efficiency at high current density, a lack of understanding of the effect of the electric field on mobile ions present in the perovskite materials, and short device lifetimes. Here we review the development of perovskite light-emitting diodes. We examine the key challenges involved in creating efficient and stable devices, and consider methods to alleviate the poor efficiency of blue-emitting devices, leverage emission in the long infrared region and create spin-polarized light-emitting diodes. This Review examines the development of perovskite light-emitting diodes, exploring the key challenges involved in creating efficient and stable devices.

Automated summary

Light-emitting diodes based on halide perovskites have achieved significant progress in recent years, with external quantum efficiencies surpassing 23%. However, their practical application is still limited due to factors such as low efficiency in blue-emitting devices, inability to access emission wavelengths above 800 nm, decreased external quantum efficiency at high current density, lack of understanding of the electric field's effect on mobile ions in perovskite materials, and short device lifetimes. This review explores the development of perovskite light-emitting diodes, examining the key challenges in creating efficient and stable devices.