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Abstract

The great progress of light-emitting diodes (LEDs) has been made based on perovskites, and the external quantum efficiency of near infrared, red and green devices have reached > 20%, exhibiting their great potential applications in lighting and displays. However, the performance of blue perovskite LEDs is very poor, thus limiting their applications in the field of full-color displays. The blue perovskite LEDs can be achieved through mixed halides or quantum confinement effect. In this paper, we review the research progress of blue perovskite LEDs based on these two strategies, discuss the challenges to achieve high-performance perovskite LEDs and present our perspectives.

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Authors and contacts

Corresponding author:Yin Yao,iamyyin@njtech.edu.cn; Zhu Lin,iamlzhu@njtech.edu.cn

Funds:Project supported by the National Natural Science Foundation of China (Grant No. 21601085) and the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20161008).

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Perovskites	EL peak/nm	Peak EQE/%	Luminance/cd·m^–2	Ref.
CH₃NH₃Pb(Br_0.36Cl_0.64)₃	482	—	1.7	[13]
CH₃NH₃Pb(Br_0.4Cl_0.6)₃	～ 480	—	—	[12]
Cs₁₀(MA_0.17FA_0.83)_(100–x)PbCl_1.5Br_1.5	475	1.7	3567	[14]
CsPb(Cl/Br)₃QDs	455	0.07	742	[15]
CsMn_yPb_1–yBr_xCl_3–xQDs	466	2.12	245	[16]
(4-PBA)-CsPbBr₃MQWs	435, 466, 491	0.015	186	[10]
POEA-CH₃NH₃PbBr₃MQWs	480, 494, 508	1.1	19.25	[17]
(IPA/PEA)-(MA/Cs)PbBr₃MQWs	490	1.5	2480	[18]
PBA-CsPbBr_3–xCl_xMQWs	473/481	0.16/0.25	217/509	[20]
PEA-CsPbBr_2.1Cl_0.9MQWs	480	5.7	3780	[11]
BA-CsPb(Br/Cl)₃MQWs	465	2.4	962	[21]
PEA-(Rb/Cs)PbBr₃MQWs	475	1.35	100.6	[19]

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Vol. 68, Issue 15 - 2019-08-05

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