Inverted White Light Organic-emitting Diodes

Xiao-liang ZHANG; Ya-nan XU; Yue-hua CHEN

doi:10.37188/CJL.20200197

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Inverted White Light Organic-emitting Diodes

Device Fabrication and Physics | 更新时间：2020-11-10

- Inverted White Light Organic-emitting Diodes
- Chinese Journal of Luminescence Vol. 41, Issue 11, Pages: 1397-1402(2020)
- 作者机构：
  
  南京邮电大学有机电子与信息显示国家重点实验室培育基地, 江苏南京 210023
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China;Natural Science Foundation of Jiangsu P
- DOI：10.37188/CJL.20200197
  CLC： TN383.1
- Received：08 July 2020，
  
  Accepted：2020-8-27，
  
  Published：2020-11
- 稿件说明：
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Xiao-liang ZHANG, Ya-nan XU, Yue-hua CHEN. Inverted White Light Organic-emitting Diodes[J]. Chinese journal of luminescence, 2020, 41(11): 1397-1402.
DOI：

Xiao-liang ZHANG, Ya-nan XU, Yue-hua CHEN. Inverted White Light Organic-emitting Diodes[J]. Chinese journal of luminescence, 2020, 41(11): 1397-1402. DOI： 10.37188/CJL.20200197.

摘要

研究了在倒置白光有机电致发光器件（Organic light-emitting diodes，OLEDs）ITO/ZnO/PEI/EML/TAPC/MoO

/Al中引入Polyethylenimine（PEI）修饰层对器件性能的影响。研究发现，PEI修饰层的引入可以有效降低ZnO电子注入层的功函数，调控器件的电子注入，改善空穴和电子注入平衡，钝化ZnO表面缺陷态，减少激子猝灭。当PEI浓度为1.0 mg/mL时，倒置白光OLED器件性能达到最佳，其亮度和效率分别为11 720 cd·m

-2

和16.0 cd·A

-1

。本研究为后期倒置结构高性能OLED器件的研发奠定了一定的基础。

Abstract

In this paper

polyethylenimine(PEI) was introduced into inverted white light-emitting diodes(IOLEDs) with the structure of ITO/ZnO/PEI/EML/TAPC/MoO

/Al. The effects of PEI as a surface modification layer on the performance of devices were investigated. It is found that the introduction of PEI can effectively reduce the work function of ZnO electron injection layer and control the electron injection of devices

improving the hole and electron injection balance. At the same time

it can passivate the surface defect states of ZnO and reduce exciton quenching. When the concentration of PEI is 1.0 mg/mL

white IOLEDs possess the optimal performance

with the largest brightness of 11 720 cd·m

-2

and efficiency of 16.0 cd·A

-1

respectively. The introduction of PEI modified layer lays a foundation for the further research of inverted OLEDs with high performance.

关键词

Keywords

references

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