Color-pure red light-emitting diodes based on two-dimensional lead-free perovskites

Thumbnail
Name:
color pure red.pdf
Size:
722.8Kb
Format:
PDF
Description:
published version
Download
Type
Article
Authors
Yuan, Fanglong cc
Zheng, Xiaopeng cc
Johnston, Andrew K. cc
Wang, Ya-Kun cc
Zhou, Chun
Dong, Yitong cc
Chen, Bin cc
Chen, Haijie cc
Fan, James Z. cc
Sharma, Geetu cc
Li, Peicheng
Gao, Yuan cc
Voznyy, Oleksandr cc
Kung, Hao-Ting
Lu, Zhenghong cc
Bakr, Osman cc
Sargent, E. cc
KAUST Department
Functional Nanomaterials Lab (FuNL)
KAUST Catalysis Center (KCC)
Material Science and Engineering
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Date
2020-10-14
Online Publication Date
2020-10-14
Print Publication Date
2020-10
Submitted Date
2020-01-23
Permanent link to this record
http://hdl.handle.net/10754/665768

Metadata
Show full item record
Abstract
It remains a central challenge to the information display community to develop red light-emitting diodes (LEDs) that meet demanding color coordinate requirements for wide color gamut displays. Here, we report high-efficiency, lead-free (PEA)2SnI4 perovskite LEDs (PeLEDs) with color coordinates (0.708, 0.292) that fulfill the Rec. 2100 specification for red emitters. Using valeric acid (VA)—which we show to be strongly coordinated to Sn$^{2+}$—we slow the crystallization rate of the perovskite, improving the film morphology. The incorporation of VA also protects tin from undesired oxidation during the film-forming process. The improved films and the reduced Sn$^{4+}$ content enable PeLEDs with an external quantum efficiency of 5% and an operating half-life exceeding 15 hours at an initial brightness of 20 cd/m$^{2}$. This work illustrates the potential of Cd- and Pb-free PeLEDs for display technology.
Citation
Yuan, F., Zheng, X., Johnston, A., Wang, Y.-K., Zhou, C., Dong, Y., … Sargent, E. H. (2020). Color-pure red light-emitting diodes based on two-dimensional lead-free perovskites. Science Advances, 6(42), eabb0253. doi:10.1126/sciadv.abb0253
Sponsors
E.H.S. and all coauthors from the Department of Electrical and Computer Engineering at the University of Toronto acknowledge the financial support from the Ontario Research Fund–Research Excellence Program, the Natural Sciences and Engineering Research Council of Canada (NSERC), and the Global Research Outreach program of Samsung Advanced Institute of Technology. Z.-H.L. and all coauthors from the Department of Materials Science and Engineering at the University of Toronto acknowledge the financial support from the NSERC (grant number 216956-12) and the National Natural Science Foundation of China (grant number 11774304). Computations were performed on the Niagara supercomputer at the SciNet HPC Consortium. SciNet is funded by the Canada Foundation for Innovation, the Government of Ontario, Ontario Research Fund–Research Excellence, and the University of Toronto.
Publisher
American Association for the Advancement of Science (AAAS)
Journal
Science Advances
DOI
10.1126/sciadv.abb0253
PubMed ID
33055155
PubMed Central ID
PMC7556835
Additional Links
https://advances.sciencemag.org/lookup/doi/10.1126/sciadv.abb0253
Collections
Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; KAUST Catalysis Center (KCC)
This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
Except where otherwise noted, this item's license is described as This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.