Perovskite Light Emitting Diodes Using Covalent Organic Polymers as Hole Injection Layers

WANG Yi-fei; XIANG Heng-yang; ZHOU Yi-hui; LI Xue-li; WANG Run; XU Bo; LIU Jun; LI Wei-jin; XIANG Zhong-hua; ZENG Hai-bo

doi:10.37188/CJL.20220147

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Perovskite Light Emitting Diodes Using Covalent Organic Polymers as Hole Injection Layers

Device Fabrication and Physics | 更新时间：2023-10-27

- Perovskite Light Emitting Diodes Using Covalent Organic Polymers as Hole Injection Layers
  增强出版
- Chinese Journal of Luminescence Vol. 43, Issue 10, Pages: 1574-1582(2022)
- 作者机构：
  
  1.南京理工大学材料科学与工程学院新型显示材料与器件工信部重点实验室，江苏南京　210094
  2.北京化工大学化学工程学院有机⁃无机复合材料国家重点实验室，北京　100029
  3.电磁环境效应与光电工程国家级重点实验室，江苏南京　210094
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(62004101;61725402;52131304);The Fundamental Research Funds for the Central Universities(30920041117;30921011106)
- DOI：10.37188/CJL.20220147
  CLC： O482.31;TN312.8
- Published：05 October 2022，
  
  Received：20 April 2022，
  
  Revised：05 May 2022，
- 稿件说明：
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王益飞,相恒阳,周怡辉等.基于共价有机聚合物空穴注入层的钙钛矿发光二极管[J].发光学报,2022,43(10):1574-158210.37188/CJL.20220147.

WANG Yi-fei,XIANG Heng-yang,ZHOU Yi-hui,et al.Perovskite Light Emitting Diodes Using Covalent Organic Polymers as Hole Injection Layers[J].Chinese Journal of Luminescence,2022,43(10):1574-158210.37188/CJL.20220147.
王益飞,相恒阳,周怡辉等.基于共价有机聚合物空穴注入层的钙钛矿发光二极管[J].发光学报,2022,43(10):1574-158210.37188/CJL.20220147. DOI：

WANG Yi-fei,XIANG Heng-yang,ZHOU Yi-hui,et al.Perovskite Light Emitting Diodes Using Covalent Organic Polymers as Hole Injection Layers[J].Chinese Journal of Luminescence,2022,43(10):1574-158210.37188/CJL.20220147. DOI：

摘要

卤化物钙钛矿（

ABX

）量子点及其发光器件具有色纯度高、外量子效率高以及在可见光范围内可调等特点，近年来在照明、显示等领域中展现出巨大潜力。然而，钙钛矿量子点发光二极管（PeQLEDs）的稳定性正成为制约其商业应用的最大障碍，除了钙钛矿发光层本身的稳定性问题之外，传输层的水氧稳定性问题也不可忽略。为了解决这一发展过程中的难题，我们提出了基于氮唑类单体构筑共价有机聚合物材料（COP‐N）替代传统的PEDOT∶PSS作为空穴注入层材料的新型PeQLEDs。我们发现COP‐N具有本征的水氧稳定性，且与PVK之间的空穴注入势垒更小。这些特性使得基于COP⁃N的PeQLED 在取得比PEDOT∶PSS更好发光效率的同时实现了近2倍的稳定性提升。我们认为，这种共价有机聚合物有望成为新型的空穴注入材料，实现高效稳定的钙钛矿电致发光，促进钙钛矿发光器件的发展。

Abstract

Halide perovskite（

ABX

） quantum dots and their light-emitting devices have the characteristics of high color purity， high luminous efficiency， and tunability in the visible light range. In recent years， they have shown great potential in lighting， display and other fields. However， the stability of perovskite quantum dot light-emitting diodes（PeQLEDs） is becoming the biggest obstacle to its commercial application. In addition to the stability of the perovskite light-emitting layer itself， the water-oxygen stability of the transport layer cannot be ignored. This work introduces a novel PeQLEDs that utilize an azole-based monomer-synthesized organic covalent polymer material（COP-N） instead of conventional PEDOT∶PSS as the hole injection layer material. We found that COP-N material has intrinsic water-oxygen stability， as well as a smaller hole injection barrier with PVK. These characteristics enable the COP-N-based PeQLED to achieve nearly twice the stability improvement while achieving better EQE than PEDO∶PSS. We believe that this organic covalent polymer material is expected to be a new type of hole injection material to achieve efficient and stable perovskite electroluminescent device， and promote the development of PeLEDs.

关键词

共价有机聚合物空穴注入层钙钛矿量子点发光二极管

Keywords

covalent organic polymershole injection layerperovskite quantum dotslight-emitting diodes

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