Efficient hybrid white organic light-emitting devices based on ambipolar blue fluorescent material

ZHANG Tian-yu; ZHANG Yi-xin; ZHANG Le-tian; XIE Wen-fa; XIAO Ling

doi:10.3788/OPE.20152313.0253

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Efficient hybrid white organic light-emitting devices based on ambipolar blue fluorescent material

更新时间：2020-08-13

- Efficient hybrid white organic light-emitting devices based on ambipolar blue fluorescent material
- Optics and Precision Engineering Vol. 23, Issue 10z, Pages: 253-258(2015)
- 作者机构：
  
  1. 吉林大学仪器科学与电气工程学院,吉林长春,中国,130012
  2. 吉林大学中日联谊医院,吉林长春,130031
  3. 吉林大学电子科学与工程学院, 集成光电子学国家重点联合实验室,吉林长春,130012
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152313.0253
  CLC： TN312.8
- Received：07 April 2015，
  
  Revised：15 May 2015，
  
  Published：14 November 2015
- 稿件说明：
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张天瑜, 张义鑫, 张乐天等. 基于双极性蓝色荧光材料的高效混合型白色有机发光器件[J]. 光学精密工程, 2015,23(10z): 253-258

ZHANG Tian-yu, ZHANG Yi-xin, ZHANG Le-tian etc. Efficient hybrid white organic light-emitting devices based on ambipolar blue fluorescent material[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 253-258
张天瑜, 张义鑫, 张乐天等. 基于双极性蓝色荧光材料的高效混合型白色有机发光器件[J]. 光学精密工程, 2015,23(10z): 253-258 DOI： 10.3788/OPE.20152313.0253.

ZHANG Tian-yu, ZHANG Yi-xin, ZHANG Le-tian etc. Efficient hybrid white organic light-emitting devices based on ambipolar blue fluorescent material[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 253-258 DOI： 10.3788/OPE.20152313.0253.

摘要

考虑引入磷光材料虽然能提高白光有机电致发光器件性能但会带来稳定性差、寿命短等问题

本文引用双极性蓝色荧光材料DPV、黄色磷光材料(BT)

Ir(acac)制作了荧光/磷光型白光有机电致发光器件。结合两个不同空穴传输层

通过两器件光谱特性和效率曲线分析双极性材料DPV的HOMO、LUMO能级、三线态能级、载流子迁移率等特性对器件性能的影响

并得到了效率、效率滚降、色坐标稳定性更为突出的白光器件。在此基础上引入TCTA作为激子阻挡层置于蓝光发光层与黄光发光层中间

利用TCTA的高三线态能级和空穴传输特性

提高黄光的辐射强度

从而在白光区域内提高器件的发光效率。最终制备器件的最大效率为10.15 cd/A

从器件最高电流效率到10000 cd/m

效率滚降为35.7%。

Abstract

Efficient hybrid White organic Light Emitting Devices(WOLEDs) were developed using an ambipolar blue fluorescent emitter 2-diphenyl-amino-7-(2

2"-diphenylvinyl)-9

9'-spirobifluorene(DPV) and the yellow phosperescent material(BT)

Ir(acac). By using two different materials for a Hole Transmitting Layer(HTL) and analyzing the curves of normalized EL spectra and efficiency

the effects of the energy level

triplet energies and charge transporting properties of the ambipolar blue materials on the performance of the devices were obtained. The white device with higher efficiency

better roll-off efficiency and a stable color coordinate also was obtained. Then 4

4"-tris(N-carbazolyl)-triphenylamine(TCTA) was introduced as an exciton blocking layer between blue and yellow light emitting layers

the high triplet energy and hole transporting characteristic of the TCTA were utilized

and the white light emitting efficiency of the device was improved. The WOLED has a maximum current efficiency of 10.15 cd/A

furthermore

it shows a efficiency roll-off of 35.7% from the brightness at maximum current efficiency to 10000 cd/m

关键词

Keywords

references

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