LiF修饰阴极的双层有机电致发光器件的延时效应

王俊西; 李宏建; 熊志勇; 徐仁伯; 李雪勇

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LiF修饰阴极的双层有机电致发光器件的延时效应

论文 | 更新时间：2020-08-12

- LiF修饰阴极的双层有机电致发光器件的延时效应
- Study on Electroluminescent Delay Time in Bilayer Organic Light-emitting Diodes with LiF/Ag Cathode
- 发光学报 2010年31卷第1期页码：17-24
- 作者机构：
  
  1. 中南大学材料科学与工程学院
  2. 中南大学物理科学与技术学院
- 作者简介：
  
  [ "" ]
  [ "" ]
  [ "" ]
  [ "" ]
  [ "" ]
- 基金信息：
- DOI：
  中图分类号： TN383.1;TN873.3
- 纸质出版日期：2010-2-20，
  
  网络出版日期：2010-2-20，
  
  收稿日期：2009-3-30，
  
  修回日期：1900-1-2，
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王俊西, 李宏建, 熊志勇, 等. LiF修饰阴极的双层有机电致发光器件的延时效应[J]. 发光学报, 2010,31(1):17-24.

WANG Jun-xi, LI Hong-jian, XIONG Zhi-yong, et al. Study on Electroluminescent Delay Time in Bilayer Organic Light-emitting Diodes with LiF/Ag Cathode[J]. Chinese Journal of Luminescence, 2010,31(1):17-24.
王俊西, 李宏建, 熊志勇, 等. LiF修饰阴极的双层有机电致发光器件的延时效应[J]. 发光学报, 2010,31(1):17-24. DOI：

WANG Jun-xi, LI Hong-jian, XIONG Zhi-yong, et al. Study on Electroluminescent Delay Time in Bilayer Organic Light-emitting Diodes with LiF/Ag Cathode[J]. Chinese Journal of Luminescence, 2010,31(1):17-24. DOI：

摘要

基于载流子的注入、传输和复合过程

建立了双层有机发光器件的电致发光延时理论模型; 讨论了电致发光延时随电压、注入势垒、内界面势垒、阳极区厚度及LiF缓冲层(BL)厚度的变化关系。结果表明:(1)低电压下

EL延时由复合过程主导

而高电压下

输运过程起着更重要的作用;(2)当

＜2时

M/O界面属于欧姆接触

电流是空间电荷限制的

注入势垒的变化对复合时间

rec

影响较大

当

＞2时

M/O界面成为接触限制

注入势垒的变化对

rec

几乎没有影响;(3)当内界面势垒超过0.3 eV

对t

rec

的影响明显变弱

复合延迟时间基本上由电压和其它因素控制; (4)当电压较小时

随L

/L的增大

rec

增大;当电压超过某一值后

rec

几乎不随L

/L的变化而变化;(5)对于LiF/Ag阴极

在不同的偏压下

LiF的厚度在3.1 nm左右时的复合时间最短

对应的EL延迟时间也最短

这与实验中从电致发光效率的角度得出的LiF最佳厚度一致。

Abstract

paper

关键词

注入势垒电致发光延时内界面势垒LiF修饰

Keywords

injection barrierEL delay timeinternal interface barrierLiF modification

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