Effect of Purity on Electroluminescent Performance of Phosphorescent Iridium Complexes

CHANG Qiao-wen; LIU Zhi-wei; WANG Deng-ke; JIANG Jing; YAN Cai-xian; LI Jie; Chen Jia-lin

doi:10.3788/fgxb20153612.1396

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Effect of Purity on Electroluminescent Performance of Phosphorescent Iridium Complexes

更新时间：2020-08-12

- Effect of Purity on Electroluminescent Performance of Phosphorescent Iridium Complexes
- Chinese Journal of Luminescence Vol. 36, Issue 12, Pages: 1396-1401(2015)
- 作者机构：
  
  1. 昆明理工大学材料科学与工程学院,云南昆明,650093
  2. 昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室, 云南昆明 650106
  3. 北京大学化学与分子工程学院北京,100871
  4. 云南大学物理科学技术学院,云南昆明,650091
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20153612.1396
  CLC： TN383+.1
- Received：13 August 2015，
  
  Revised：23 September 2015，
  
  Published：10 December 2015
- 稿件说明：
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常桥稳, 刘志伟, 王登科等. 磷光铱配合物的纯度对其电致发光性能的影响[J]. 发光学报, 2015,36(12): 1396-1401

CHANG Qiao-wen, LIU Zhi-wei, WANG Deng-ke etc. Effect of Purity on Electroluminescent Performance of Phosphorescent Iridium Complexes[J]. Chinese Journal of Luminescence, 2015,36(12): 1396-1401
常桥稳, 刘志伟, 王登科等. 磷光铱配合物的纯度对其电致发光性能的影响[J]. 发光学报, 2015,36(12): 1396-1401 DOI： 10.3788/fgxb20153612.1396.

CHANG Qiao-wen, LIU Zhi-wei, WANG Deng-ke etc. Effect of Purity on Electroluminescent Performance of Phosphorescent Iridium Complexes[J]. Chinese Journal of Luminescence, 2015,36(12): 1396-1401 DOI： 10.3788/fgxb20153612.1396.

摘要

采用不同的真空热梯度升华条件

获得了不同纯度的乙酰丙酮酸二(2-苯基吡啶)铱Ir(ppy)

(acac)。以不同纯度Ir(ppy)

(acac)为客体材料

制备了结构为ITO:MoO

/CBP/CBP:Ir(ppy)

(acac)/TPBi/LiF:Al的有机发光二极管(OLEDs)

其中CBP和TPBi分别是4

4'-二(9-咔唑)联苯和1

5-三(1-苯基-1H-苯并咪唑-2-基)苯。评价了不同纯度磷光铱配合物制备的器件的电致发光性能

探索了磷光铱配合物纯度对器件性能的影响。结果表明:Ir(ppy)

(acac)升华后可以提高器件的稳定性

纯度高的材料可以在较低的掺杂浓度下获得较高的发光效率。

Abstract

Ir(ppy)

(acac) with different purity levels were obtained by adopting various thermal gradient vacuum sublimation conditions

and were used as phosphorescence dopants in OLEDs with a structure of ITO:MoO

/CBP/CBP:Ir(ppy)

(acac)/TPBi/LiF/Al

where CBP and TPBi were the abbreviations of 4

4'-N

N'-dicarbazole-biphenyl and 1

5-tris(N-phenylbenzimidazole-2-yl) benzene

respectively. The electroluminescent performances of Ir(ppy)

(acac) were evaluated and the effect of purity levels was explored. The results indicate that sublimation improves electroluminescent stability of the device

and a higher purity level endows the device with greater electroluminescent efficiency even at a low doping concentration.

关键词

Keywords

references

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