High-efficiency Perovskite Light-emitting Diodes <italic style="font-style: italic">via</italic> Novel Cobalt-based Hole Transporter Layer

QIN Xiangqian; LI Mingliang; ZHAO Yaping; ZHANG Qin; WEI Zhanhua

doi:10.37188/CJL.20220377

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High-efficiency Perovskite Light-emitting Diodes via Novel Cobalt-based Hole Transporter Layer

Invited Paper | 更新时间：2023-04-12

- High-efficiency Perovskite Light-emitting Diodes via Novel Cobalt-based Hole Transporter Layer
  增强出版
- Chinese Journal of Luminescence Vol. 44, Issue 3, Pages: 548-558(2023)
- 作者机构：
  
  1.华侨大学材料科学与工程学院发光材料与信息显示研究院，福建厦门　361021
  2.中国工程物理研究院化工材料研究所，四川成都　610200
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(U21A2078;51902110;22179042;12104170);the Natural Science Foundation of Fujian Province(2020J06021;2019J01057;2020J01064);Scientific Research Funds of Huaqiao University;Subsidized Project for Postgraduate's Innovative Fund in Scientific Research of Huaqiao University
- DOI：10.37188/CJL.20220377
  CLC： TN312.8
- Published：05 March 2023，
  
  Received：25 October 2022，
  
  Revised：14 November 2022，
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秦向前,黎明亮,赵亚萍等.新型钴基空穴传输层助力高效钙钛矿发光二极管[J].发光学报,2023,44(03):548-558.

QIN Xiangqian,LI Mingliang,ZHAO Yaping,et al.High-efficiency Perovskite Light-emitting Diodes via Novel Cobalt-based Hole Transporter Layer[J].Chinese Journal of Luminescence,2023,44(03):548-558.
秦向前,黎明亮,赵亚萍等.新型钴基空穴传输层助力高效钙钛矿发光二极管[J].发光学报,2023,44(03):548-558. DOI： 10.37188/CJL.20220377.

QIN Xiangqian,LI Mingliang,ZHAO Yaping,et al.High-efficiency Perovskite Light-emitting Diodes via Novel Cobalt-based Hole Transporter Layer[J].Chinese Journal of Luminescence,2023,44(03):548-558. DOI： 10.37188/CJL.20220377.

摘要

金属卤化物钙钛矿发光二极管（Perovskite light⁃emitting diodes， Pero⁃LEDs）器件结构中，空穴传输层（HTL）是影响Pero⁃LEDs效率的关键性因素之一。由于醋酸钴（Co（OAc）

）薄膜具有优异的光电特性，所以选其作为绿光Pero⁃LEDs的HTL。然而，纯的钴基底薄膜存在传输载流子能力较差、薄膜粗糙度较大等问题。因此，本文通过引入有机小分子添加剂乙醇胺（ETA）来有效调控传输层中Co

/Co

比例，提升传输层的导电能力。同时，因ETA的加入可以减缓退火过程中前驱体溶液的析出结晶速度，从而形成粗糙度较小的HTL薄膜，进而有利于形成高质量的钙钛矿薄膜。基于掺杂的HTL，其最优器件亮度高达45 207 cd/m

，最大外量子效率（EQE）达到15.08%，是一种性能较好的新型HTL。

Abstract

In the device structure of metal halide perovskite light-emitting diodes （Pero-LEDs）， the hole transport layer （HTL） is one of the critical factors affecting the efficiency of Pero-LEDs. Because cobalt acetate （Co（OAc）

） film has excellent photoelectric properties， it has been selected as the HTL for green Pero-LEDs. However， the pure cobalt-based HTL films have problems such as poor carrier transport ability and large film roughness. Therefore， in this paper， by introducing the organic small molecule additive ethanolamine （ETA）， the proportion of Co

/Co

in the transport layer is effectively regulated， and the conductivity of the transport layer is improved. At the same time， the addition of ETA can slow down the crystallization process of HTL precursor solution during the annealing process， bringing in a transport layer film with lower roughness， which is conducive to the deposition of high-quality perovskite films. Based on the doped Co-based HTL films， the optimal device brightness reaches 45 207 cd/m

， and the maximum external quantum efficiency （EQE） reaches 15.08%， proving that the Co-based compound is a novel HTL with good device performance.

关键词

钙钛矿发光二极管醋酸钴乙醇胺空穴传输材料掺杂

Keywords

perovskite LEDsCo（OAc）2ethanolaminehole transport layerdoping

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State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University

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High-efficiency Perovskite Light-emitting Diodes via Novel Cobalt-based Hole Transporter Layer

DOI：10.37188/CJL.20220377

摘要

Abstract

关键词

Keywords

references