The Electroluminescent Performance of OLED Based on Different Hole Transport Layer

YUAN Tao-li; ZHANG Fang-hui; ZHANG Wei; HUANG Jin

doi:10.3788/fgxb20133411.1457

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The Electroluminescent Performance of OLED Based on Different Hole Transport Layer

更新时间：2020-08-12

- The Electroluminescent Performance of OLED Based on Different Hole Transport Layer
- Chinese Journal of Luminescence Vol. 34, Issue 11, Pages: 1457-1461(2013)
- 作者机构：
  
  陕西科技大学电气与信息工程学院,陕西西安,710021
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20133411.1457
  CLC： TN383+.1
- Received：21 June 2013，
  
  Revised：17 July 2013，
  
  Published：10 November 2013
- 稿件说明：
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袁桃利, 张方辉, 张微, 黄晋. 空穴传输层对有机电致发光器件性能的影响[J]. 发光学报, 2013,34(11): 1457-1461

YUAN Tao-li, ZHANG Fang-hui, ZHANG Wei, HUANG Jin. The Electroluminescent Performance of OLED Based on Different Hole Transport Layer[J]. Chinese Journal of Luminescence, 2013,34(11): 1457-1461
袁桃利, 张方辉, 张微, 黄晋. 空穴传输层对有机电致发光器件性能的影响[J]. 发光学报, 2013,34(11): 1457-1461 DOI： 10.3788/fgxb20133411.1457.

YUAN Tao-li, ZHANG Fang-hui, ZHANG Wei, HUANG Jin. The Electroluminescent Performance of OLED Based on Different Hole Transport Layer[J]. Chinese Journal of Luminescence, 2013,34(11): 1457-1461 DOI： 10.3788/fgxb20133411.1457.

摘要

制备了结构为ITO/MoO

(40 nm)/空穴传输层/CBP:Ir(ppy)

acac(8%)(30 nm)/BCP(10 nm)/Alq

(40 nm)/LiF(1 nm)/Al(100 nm)的器件

其中Ir(ppy)

acac为绿色磷光染料

空穴传输层分别为TAPC(50 nm)、TAPC(40 nm)/TCTA(10 nm)、NPB(50 nm)、NPB(40 nm)/TCTA(10 nm)。通过使用4种不同结构的空穴传输层

对器件的发光性能进行了研究。结果表明

空穴传输层对器件的发光性能有较大影响。在电压为6 V、电流密度为2 mA/cm

的条件下

4种结构的器件的电流效率分别为52.5

67.8

35.6

56.6 cd/A。其原因是TAPC/TCTA及NPB/TCTA能级结构更有利于空穴对发光层的注入而且TAPC拥有较高的空穴迁移率;另外

TAPC及TCTA拥有较高的LUMO和三线态能量

可以有效地将电子和三线态激子束缚在发光层内

增加绿光染料的复合发光几率。所制备的器件均表现出良好的色坐标稳定性。

Abstract

Green phosphorescent organic light emitting diodes were fabricated utilizing Ir(ppy)

acac phosphorescent materials. The device structure was ITO/MoO

(40 nm)/hole transport layer/CBP: Ir(ppy)

acac(8%)(30 nm)/BCP(10 nm)/Alq

(40 nm)/LiF(1 nm)/Al(100 nm)

the hole transport layers were TAPC(50 nm)

TAPC(40 nm)/TCTA(10 nm)

NPB(50 nm)

and NPB(40 nm)/TCTA(10 nm)

respectively. The electroluminescent properties were studied by using different hole transport layer. The current efficiency of these devices achieve 52.5

67.8

35.6

and 56.6 cd/A at 6 V

respectively. The reasons are that the stepwise holes injection layers and high hole mobility make holes inject and transport to emitting layer more easily. Moreover

the high triplet energy level blocking layers confine the carriers and excitons in emitting layer. Besides

the color coordinates of all devices are stable.

关键词

Keywords

references

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