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Issue 5, 2019
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Blue perovskite light-emitting diodes: progress, challenges and future directions

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Abstract

Metal halide perovskites have excellent optical and electrical properties and can be easily processed via low-cost solution-based techniques like blade-coating and inkjet printing, promising a bright future for various optoelectronic applications. Recently, encouraging progress has been made in perovskite light-emitting diodes (PeLEDs). Green, red, and near-infrared PeLEDs have achieved high external quantum efficiencies of more than 20%. However, as historically blue electroluminescence remains challenging in all previous LED technologies, we are witnessing a similar case with the development of blue PeLEDs, an essential part of displays and solid-state lighting, which lag far behind those of their counterparts. Herein, we review the recent progress of blue PeLEDs and discuss the main challenges including colour instability, poor photoluminescence efficiency and emission quenching by interlayers. Future directions are provided to facilitate the development of efficient blue PeLEDs.

Graphical abstract: Blue perovskite light-emitting diodes: progress, challenges and future directions

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Article information


Submitted
06 Dec 2018
Accepted
02 Jan 2019
First published
02 Jan 2019

This article is Open Access

Nanoscale, 2019,11, 2109-2120
Article type
Minireview

Blue perovskite light-emitting diodes: progress, challenges and future directions

N. K. Kumawat, X. Liu, D. Kabra and F. Gao, Nanoscale, 2019, 11, 2109
DOI: 10.1039/C8NR09885A

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