Photophysical and Electroluminescent Properties of Organic System Doped with Phosphorescent Cu Complex

HE Lin; MA Yu-guang; SHEN Jia-cong

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Photophysical and Electroluminescent Properties of Organic System Doped with Phosphorescent Cu Complex

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- Photophysical and Electroluminescent Properties of Organic System Doped with Phosphorescent Cu Complex
- Chinese Journal of Luminescence Vol. 24, Issue 6, Pages: 620-623(2003)
- 作者机构：
  
  吉林大学, 超分子结构与材料教育部重点实验室,吉林长春,130023
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN383.1;TN873.3
- Received：29 November 2002，
  
  Revised：19 May 2003，
  
  Published：20 November 2003
- 稿件说明：
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何琳, 马於光, 沈家骢. 铜配合物的光物理与电致发光性能[J]. 发光学报, 2003,24(6): 620-623

HE Lin, MA Yu-guang, SHEN Jia-cong. Photophysical and Electroluminescent Properties of Organic System Doped with Phosphorescent Cu Complex[J]. Chinese Journal of Luminescence, 2003,24(6): 620-623
何琳, 马於光, 沈家骢. 铜配合物的光物理与电致发光性能[J]. 发光学报, 2003,24(6): 620-623 DOI：

HE Lin, MA Yu-guang, SHEN Jia-cong. Photophysical and Electroluminescent Properties of Organic System Doped with Phosphorescent Cu Complex[J]. Chinese Journal of Luminescence, 2003,24(6): 620-623 DOI：

摘要

以中心原子为铜的磷光材料Cu

(C≡Cph)

[L=1

8-bis(diphenylphosphino)-3

6-dioxaoctane](简称Cu

)作为掺杂材料

选用空穴传输材料聚乙烯基咔唑(PVK)为母体材料

制作结构为ITO/Cu

:PVK/TAZ/Mg:Ag/Ag的双层器件

其发光颜色随掺杂的变化而改变

在较高掺杂浓度的条件下

可观察到单纯Cu

的发光

即实现了单重态到三重态的能量转移。着重讨论了主客体材料间的能量转移过程

并研究了影响器件效率的外界因素如氧气的猝灭对Cu

发光强度的影响。

Abstract

Organic small molecule and polymer luminescent materials have shown great potential for commercial application of organic light-emitting diodes (OLED)

due to their high luminescent level and quantum efficiency.With the development of OLED more and more attentions were attracted to improve their efficiency.Because excitons are strongly confined for molecular semiconductors

the relative spin configuration of injecting electron (spin 1/2) and hole (spin 1/2) determines the excited state properties (singlet or triplet).Radiative decay from singlet exciton is fast and that from triplets is spin-forbidden.and.often very inefficient

but triplet emission is partially allowed in the presence of spin-orbit coupling and can be seen in molecule containing elements of high atomic number.The use of triplet emitters to improve OLED efficiency has already been proposed.Up to date

most center metal atoms are rare metals such as Pt

Os etc.

but it is essential for people to find some cheaper ones to realize efficient EL emission and to decrease the cost of OLED.Cu

displays intense emission at 520nm with a quantum yield of 0.42 in-dichloromethane.Here we reported the results of devices using a blend film of Cu

and the hole transport polymer PVK as the emitting layer.The structure of this device is ITO/Cu

: PVK/TAZ/Mg/Al and it can realize the emission of triplet Cu

at 516nm.The research focused on energy transfer especially on EL process and the influence of oxygen on the photoluminescence of Cu

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