Regulation of carrier in double organic electroluminescent phosphorescent emitting layer(green and red)

HUANG Jin; ZHANG Fang-hui; ZHANG Wei

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Regulation of carrier in double organic electroluminescent phosphorescent emitting layer(green and red)

Material Physics & Chemistry | 更新时间：2020-08-12

- Regulation of carrier in double organic electroluminescent phosphorescent emitting layer(green and red)
- Chinese Journal of Liquid Crystals and Displays Vol. 29, Issue 1, Pages: 22-27(2014)
- 作者机构：
  
  陕西科技大学电信学院,陕西西安,710021
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN383.1;TH691.9
- Received：04 July 2013，
  
  Revised：26 October 2013，
  
  Published：15 February 2014
- 稿件说明：
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黄晋, 张方辉, 张微. 绿红双发光层有机电致磷光器件的载流子调控研究[J]. 液晶与显示, 2014,29(1): 22-27

HUANG Jin, ZHANG Fang-hui, ZHANG Wei. Regulation of carrier in double organic electroluminescent phosphorescent emitting layer(green and red)[J]. , 2014,29(1): 22-27
黄晋, 张方辉, 张微. 绿红双发光层有机电致磷光器件的载流子调控研究[J]. 液晶与显示, 2014,29(1): 22-27 DOI：

HUANG Jin, ZHANG Fang-hui, ZHANG Wei. Regulation of carrier in double organic electroluminescent phosphorescent emitting layer(green and red)[J]. , 2014,29(1): 22-27 DOI：

摘要

制备了结构为ITO/MoO

（40 nm）/NPB（40 nm）/TCTA（10 nm）/CBP：GIR

（14%）（

）/CBP：R-4B（6%）（30-

）/BCP（10 nm）/AlQ（40 nm）/LiF（1 nm）/AL（100 nm）的绿红磷光器件。通过调节红绿发光层的相对厚度，对器件的发光性能进行了研究。结果表明：

为15 nm，电压为6 V，电流密度为255.6 mA/cm

，得到最高电流效率为15.4 cd/A，红色发光峰值强度相对较大，绿色峰值稍弱的电致发光光谱。分析原因可能是掺杂染料与临近层的能级匹配和浓度等会影响发光层载流子注入与传输；空穴及电子阻挡层对发光层内载流子和激子的有效限制作用会提高掺杂染料在发光层的复合几率；另外，CBP的空穴迁移率大于电子迁移率，发光的主要区域位于发光层与BCP界面，掺杂于该区域的R-4B具有较高的发光强度。

Abstract

The phosphorescent devices(green and red)

which structure was ITO/MoO

(40 nm)/NPB (40 nm)/TCTA (10 nm)/CBP:GIR

(14%)(

)/CBP:R-4B (6%) (30-

)/BCP (10 nm)/AlQ (40 nm)/LiF (1 nm)/AL (100 nm)

were prepared.Double emitting layer(green and red) is organic electroluminescent phosphorescent devices

which was regulated at carrier. The results showed that doping order was green

red

(green (red) was 15 nm (15 nm))

at 6 V

current density was 255.6 mA/cm

the maximum current efficiency was 15.4 cd/A. In addition

because of utilization the green red doping behavior

red (R-4B) emitting peak was easier to appear

and ultimately the red dye possessed relatively large emitting intensity and weak green light-emitting. Analysis of the reason may be carrier injection and carrier mobility of balance and BCP control effect.

关键词

Keywords

references

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