Mechanism study on highly efficient polymer light-emitting diodes utilizing double-layered alkali halide electron injection layer

Enhancing the injection of electron is an effective strategy to improve the performance of polymer light-emitting diodes (PLEDs). In this work, we reported a 286% improvement in current efficiency (CE) of PLEDs by using double-layered alkali halide electron injection layer (EIL) NaCl/LiF instead of...

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Autores principales: Niu, Qiaoli, Tong, Jing, Duan, Xiaomeng, Zhang, Haoran, Wang, Dexu, Hai, Gang, Lv, Hao, Zeng, Wenjin, Xia, Ruidong, Min, Yonggang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6890694/
https://www.ncbi.nlm.nih.gov/pubmed/31796835
http://dx.doi.org/10.1038/s41598-019-54729-3
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author Niu, Qiaoli
Tong, Jing
Duan, Xiaomeng
Zhang, Haoran
Wang, Dexu
Hai, Gang
Lv, Hao
Zeng, Wenjin
Xia, Ruidong
Min, Yonggang
author_facet Niu, Qiaoli
Tong, Jing
Duan, Xiaomeng
Zhang, Haoran
Wang, Dexu
Hai, Gang
Lv, Hao
Zeng, Wenjin
Xia, Ruidong
Min, Yonggang
author_sort Niu, Qiaoli
collection PubMed
description Enhancing the injection of electron is an effective strategy to improve the performance of polymer light-emitting diodes (PLEDs). In this work, we reported a 286% improvement in current efficiency (CE) of PLEDs by using double-layered alkali halide electron injection layer (EIL) NaCl/LiF instead of LiF. A significant enhancement of electron injection was observed after inserting the NaCl layer. To understand the mechanism of such improvement, the devices with KBr/LiF and CsF/LiF as EILs were also investigated. Experimental results show that metal cation migrated under the effect of built-in electric field (V(bi)), which plays the main role on the improvement of electron injection in PLEDs.
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spelling pubmed-68906942019-12-10 Mechanism study on highly efficient polymer light-emitting diodes utilizing double-layered alkali halide electron injection layer Niu, Qiaoli Tong, Jing Duan, Xiaomeng Zhang, Haoran Wang, Dexu Hai, Gang Lv, Hao Zeng, Wenjin Xia, Ruidong Min, Yonggang Sci Rep Article Enhancing the injection of electron is an effective strategy to improve the performance of polymer light-emitting diodes (PLEDs). In this work, we reported a 286% improvement in current efficiency (CE) of PLEDs by using double-layered alkali halide electron injection layer (EIL) NaCl/LiF instead of LiF. A significant enhancement of electron injection was observed after inserting the NaCl layer. To understand the mechanism of such improvement, the devices with KBr/LiF and CsF/LiF as EILs were also investigated. Experimental results show that metal cation migrated under the effect of built-in electric field (V(bi)), which plays the main role on the improvement of electron injection in PLEDs. Nature Publishing Group UK 2019-12-03 /pmc/articles/PMC6890694/ /pubmed/31796835 http://dx.doi.org/10.1038/s41598-019-54729-3 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Niu, Qiaoli
Tong, Jing
Duan, Xiaomeng
Zhang, Haoran
Wang, Dexu
Hai, Gang
Lv, Hao
Zeng, Wenjin
Xia, Ruidong
Min, Yonggang
Mechanism study on highly efficient polymer light-emitting diodes utilizing double-layered alkali halide electron injection layer
title Mechanism study on highly efficient polymer light-emitting diodes utilizing double-layered alkali halide electron injection layer
title_full Mechanism study on highly efficient polymer light-emitting diodes utilizing double-layered alkali halide electron injection layer
title_fullStr Mechanism study on highly efficient polymer light-emitting diodes utilizing double-layered alkali halide electron injection layer
title_full_unstemmed Mechanism study on highly efficient polymer light-emitting diodes utilizing double-layered alkali halide electron injection layer
title_short Mechanism study on highly efficient polymer light-emitting diodes utilizing double-layered alkali halide electron injection layer
title_sort mechanism study on highly efficient polymer light-emitting diodes utilizing double-layered alkali halide electron injection layer
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6890694/
https://www.ncbi.nlm.nih.gov/pubmed/31796835
http://dx.doi.org/10.1038/s41598-019-54729-3
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