Focus on performance of perovskite light-emitting diodes
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REVIEW ARTICLE
Focus on performance of perovskite light-emitting diodes Peipei DU1, Liang GAO2, Jiang TANG (✉)2 1 State Key Laboratory of Material Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China 2 Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
© Higher Education Press 2020
Abstract Perovskite-based optoelectronic devices, especially perovskite light-emitting diodes (PeLEDs) and perovskite solar cells, have recently attracted considerable attention. The National Renewable Energy Laboratory (NREL) chart inspires us to develop a counterpart for PeLEDs. In this study, we collect the record performance of PeLEDs including several new entries to address their latest external quantum efficiency (EQE), highest luminance, and stability status. We hope that these performance tables and future updated versions will show the frontiers of PeLEDs, assist researchers in capturing the overview of this field, identify the remaining challenges, and predict the promising research directions. Keywords metal halide perovskite, light-emitting diode (LED), performance table
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Introduction
Metal halide perovskites, a class of promising semiconductor materials with superior photoelectric properties, have produced a significant progress in solar cells, lightemitting diodes (LEDs), photodetectors, and lasers [1]. Thus far, the most active research area is solar cells, which enjoy a continually improved efficiency and growing commercial activities. Their efficiency evolution is available on the National Renewable Energy Laboratory (NREL) chart, which records the best certified efficiencies of state-of-the-art solar cells from 1976 to the present day. This chart allows readers to conveniently track industry trends and cutting-edge research status, which accelerates the advancement of this field. However, until now, there has been no record line, chart, Received April 27, 2020; accepted May 15, 2020 E-mail: [email protected]
or even a review for perovskite light-emitting diodes (PeLEDs). In 2018, Cao et al. [2] and Lin et al. [3] have simultaneously reported highly efficient near-infrared and green PeLEDs with an external quantum efficiency (EQE) greater than 20%. The EQEs of PeLEDs matched those of commercial organic LEDs (OLEDs) in approximately four years after their development [4], which suggests the unparalleled potential of PeLEDs in lighting and display applications. Soon after, a red PeLED with an EQE of 21.6% was developed [5], which marked 2018 as a milestone in the development of PeLEDs. In addition, efficient blue PeLEDs have been recently reported [6,7]. Encouraged by the unprecedentedly rapid progress [8], more researchers have focused on PeLEDs and produced many encouraging results. In this paper, we present useful tables containing worldclass PeLEDs, aiming to provide researchers working on PeLED technologies
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