Organic Electroluminescent Devices Using a New Organic Complex of Rare-earth Europium EuL1L2

LIU Song; YANG Li-ying; ZHANG He-feng; NIU Xia; DENG Jia-chun; ZHONG Ding; HUA Yu-lin; YIN

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Organic Electroluminescent Devices Using a New Organic Complex of Rare-earth Europium EuL₁L₂

更新时间：2020-08-11

- Organic Electroluminescent Devices Using a New Organic Complex of Rare-earth Europium EuL₁L₂
- Chinese Journal of Luminescence Vol. 27, Issue 4, Pages: 553-556(2006)
- 作者机构：
  
  1. 郑州大学, 化学系, 河南, 郑州, 450001
  2. 天津理工大学理学院, 材料物理研究所天津,300191
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN383.1;TN878.3
- Received：05 November 2005，
  
  Revised：2006-4-12，
  
  Published：20 July 2006
- 稿件说明：
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刘嵩, 杨利营, 张贺丰, 牛霞, 邓家春, 钟鼎, 华玉林, 印寿根, 杜晨霞. 一种新型铕配合物的有机电致发光性能[J]. 发光学报, 2006,27(4): 553-556

LIU Song, YANG Li-ying, ZHANG He-feng, NIU Xia, DENG Jia-chun, ZHONG Ding, HUA Yu-lin, YIN Shou-gen, DU Chen-xia. Organic Electroluminescent Devices Using a New Organic Complex of Rare-earth Europium EuL1L2[J]. Chinese Journal of Luminescence, 2006,27(4): 553-556
刘嵩, 杨利营, 张贺丰, 牛霞, 邓家春, 钟鼎, 华玉林, 印寿根, 杜晨霞. 一种新型铕配合物的有机电致发光性能[J]. 发光学报, 2006,27(4): 553-556 DOI：

LIU Song, YANG Li-ying, ZHANG He-feng, NIU Xia, DENG Jia-chun, ZHONG Ding, HUA Yu-lin, YIN Shou-gen, DU Chen-xia. Organic Electroluminescent Devices Using a New Organic Complex of Rare-earth Europium EuL1L2[J]. Chinese Journal of Luminescence, 2006,27(4): 553-556 DOI：

摘要

研究了一种新型的稀土金属铕配合物EuL

的光致发光和电致发光特性。将这种铕配合物掺杂到PVK:PBD中

制备成结构为ITO/PVK:PBD:EuL

/PBD/Alq

/Mg:Ag/Ag的器件

对其电致发光性能进行研究

发现Eu

离子和Alq

的相对发光强度随PVK:PBD:EuL

和Alq

之间的激子阻挡层PBD的厚度变化而变化

通过调节PBD的厚度

得到了色纯度较高的红色电致发光器件

其光谱具有显著的Eu

离子的光谱特征。

Abstract

Organic light-emitting diodes(OLEDs) are of great interest

since they efficiently emit light in the visible region and give promising applications.Full color displays require pure red

green and blue emission.However

the broad nature of the luminescent spectra of these organic molecules leads to the poor luminescent purity

which is dull and

thus

not suited for actual display applications.Rare earth complexes are very suitable for full color displays because of their sharp emission bands.In addition

EL efficiency based on rare earth complex is not limited by spin ruling

since their photoluminescence results from the formation of both singlets and triplets of the ligands

and then transferring energy to lanthanide cores.Theoretically

the upper limit of inner quantum efficiency can reach 100%

which is four times higher than that of the devices using other fluorescent material.For OLEDs

the development of high-perfor-(mance) red emission is still much in demand compared with both green and blue emission.A new organic complex of rare-earth europium(Eu) EuL

was reported.The electroluminescence and photoluminescence of this Eu complex were studied.The multilayer devices with the structure of ITO/PVK:PBD:EuL

/PBD/Alq

/Mg:Ag/Ag were fabricated

using PVK:PBD:EuL

as emitting layer

PBD as(exciton) block layer

and Alq

as electron transporting layer.The emission from electron transfer layer was easily seen because the lifetime of exicton of Eu complex.In the experiment

a electron transfer material PBD was used as exciton block layer.Alq

emission intensity become weaker than that of Eu complex

with the increase of the exciton block layer PBD thickness.As the block layer 80 nm

a pure red light with a peak of 612 nm and a half bandwidth of 10 nm

attribute to the(emission) of trivalent europium

was observed clearly.The assignment of the emission bands is referenced to(analogous) complex: 576 nm(

→

)

590 nm(

→

)

612 nm(

→

)

652 nm(

→

)

700 nm(

→

).The CIE coordinates of resulting emission was(0.608

0.339)

a maximum luminescence brightness of 20cd/m

and external quantum efficiency brightness of 0.09% were achieved.

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