Light-Emitting Diodes based on Metal Halide Perovskite and Perovskite Related Nanocrystals

TL;DR

This review discusses the development, strategies, and challenges of halide perovskite nanocrystal LEDs, highlighting advancements in efficiency, color purity, and environmentally friendly options since 2014.

Contribution

It provides a comprehensive survey of current methods and progress in high-efficiency lead-based and lead-free perovskite nanocrystal LEDs, including synthesis and emission mechanisms.

Findings

Significant improvements in LED performance since 2014

Effective strategies for synthesis optimization and doping

Progress in environmentally friendly lead-free LEDs

Abstract

Light-emitting diodes (LEDs) based on halide perovskite nanocrystals have attracted extensive attention due to their considerable luminescence efficiency, wide color gamut, high color purity, and facile material synthesis. Since the first demonstration of LEDs based on MAPbBr3 nanocrystals were reported in 2014, the community has witnessed a rapid development in their performances. In this review, we provide a historical perspective of the development of LEDs based on halide perovskite nanocrystals and then present a comprehensive survey of current strategies to high-efficiency lead-based perovskite nanocrystals LEDs, including synthesis optimization, ion doping/alloying and shell coating. We then review the basic characteristics and emission mechanisms of lead-free perovskite and perovskite-related nanocrystals emitters in environmentally friendly LEDs, from the standpoint of different emission colors. Finally, we cover the progress in LED applications and provide an outlook of the opportunities and challenges for future developments in this field.