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Color-pure red light-emitting diodes based on two-dimensional lead-free perovskites
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)(2)SnI(4) perovskite LEDs (PeLEDs) with color coordinates (...
Autores principales: | , , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Association for the Advancement of Science
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7556835/ https://www.ncbi.nlm.nih.gov/pubmed/33055155 http://dx.doi.org/10.1126/sciadv.abb0253 |
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author | Yuan, Fanglong Zheng, Xiaopeng Johnston, Andrew Wang, Ya-Kun Zhou, Chun Dong, Yitong Chen, Bin Chen, Haijie Fan, James Z. Sharma, Geetu Li, Peicheng Gao, Yuan Voznyy, Oleksandr Kung, Hao-Ting Lu, Zheng-Hong Bakr, Osman M. Sargent, Edward H. |
author_facet | Yuan, Fanglong Zheng, Xiaopeng Johnston, Andrew Wang, Ya-Kun Zhou, Chun Dong, Yitong Chen, Bin Chen, Haijie Fan, James Z. Sharma, Geetu Li, Peicheng Gao, Yuan Voznyy, Oleksandr Kung, Hao-Ting Lu, Zheng-Hong Bakr, Osman M. Sargent, Edward H. |
author_sort | Yuan, Fanglong |
collection | PubMed |
description | 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)(2)SnI(4) 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. |
format | Online Article Text |
id | pubmed-7556835 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | American Association for the Advancement of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-75568352020-10-26 Color-pure red light-emitting diodes based on two-dimensional lead-free perovskites Yuan, Fanglong Zheng, Xiaopeng Johnston, Andrew Wang, Ya-Kun Zhou, Chun Dong, Yitong Chen, Bin Chen, Haijie Fan, James Z. Sharma, Geetu Li, Peicheng Gao, Yuan Voznyy, Oleksandr Kung, Hao-Ting Lu, Zheng-Hong Bakr, Osman M. Sargent, Edward H. Sci Adv Research Articles 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)(2)SnI(4) 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. American Association for the Advancement of Science 2020-10-14 /pmc/articles/PMC7556835/ /pubmed/33055155 http://dx.doi.org/10.1126/sciadv.abb0253 Text en Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/ https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , 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. |
spellingShingle | Research Articles Yuan, Fanglong Zheng, Xiaopeng Johnston, Andrew Wang, Ya-Kun Zhou, Chun Dong, Yitong Chen, Bin Chen, Haijie Fan, James Z. Sharma, Geetu Li, Peicheng Gao, Yuan Voznyy, Oleksandr Kung, Hao-Ting Lu, Zheng-Hong Bakr, Osman M. Sargent, Edward H. Color-pure red light-emitting diodes based on two-dimensional lead-free perovskites |
title | Color-pure red light-emitting diodes based on two-dimensional lead-free perovskites |
title_full | Color-pure red light-emitting diodes based on two-dimensional lead-free perovskites |
title_fullStr | Color-pure red light-emitting diodes based on two-dimensional lead-free perovskites |
title_full_unstemmed | Color-pure red light-emitting diodes based on two-dimensional lead-free perovskites |
title_short | Color-pure red light-emitting diodes based on two-dimensional lead-free perovskites |
title_sort | color-pure red light-emitting diodes based on two-dimensional lead-free perovskites |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7556835/ https://www.ncbi.nlm.nih.gov/pubmed/33055155 http://dx.doi.org/10.1126/sciadv.abb0253 |
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