Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (12): 127304-127304.doi: 10.1088/1674-1056/22/12/127304

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Increased performance of an organic light-emitting diode by employing a zinc phthalocyanine based composite hole transport layer

郭闰达, 岳守振, 王鹏, 陈宇, 赵毅, 刘式墉   

  1. Department of State Key Laboratory on Integrated Optoelectronics, College of Electronics Science and Engineering, Jilin University, Changchun 130012, China
  • 收稿日期:2013-03-21 修回日期:2013-05-15 出版日期:2013-10-25 发布日期:2013-10-25
  • 基金资助:
    Project supported by the National Key Basic Research and Development Program of China (Grant No. 2010CB327701) and the National Natural Science Foundation of China (Grant No. 61275033).

Increased performance of an organic light-emitting diode by employing a zinc phthalocyanine based composite hole transport layer

Guo Run-Da (郭闰达), Yue Shou-Zhen (岳守振), Wang Peng (王鹏), Chen Yu (陈宇), Zhao Yi (赵毅), Liu Shi-Yong (刘式墉)   

  1. Department of State Key Laboratory on Integrated Optoelectronics, College of Electronics Science and Engineering, Jilin University, Changchun 130012, China
  • Received:2013-03-21 Revised:2013-05-15 Online:2013-10-25 Published:2013-10-25
  • Contact: Zhao Yi E-mail:yizhao@jlu.edu.cn
  • Supported by:
    Project supported by the National Key Basic Research and Development Program of China (Grant No. 2010CB327701) and the National Natural Science Foundation of China (Grant No. 61275033).

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摘要： We demonstrate that the electroluminescent performances of organic light-emitting diodes are significantly improved by employing a zinc phthalocyanine (ZnPc)-based composite hole transport layer (c-HTL). The optimum ris-(8-hydroxyquinoline)aluminum (Alq3)-based organic light-emitting diode with a c-HTL exhibits a lower turn-on voltage of 2.8 V, a higher maximum current efficiency of 3.40 cd/A and a higher maximum power efficiency of 1.91 lm/W, which are superior to those of the conventional device (turn-on voltage of 3.8 V, maximum current efficiency of 2.60 cd/A, and maximum power efficiency of 1.21 lm/W). We systematically studied the effects of different kinds of N’-diphenyl-N,N’-bis(1-naphthyl)(1,1’-biphenyl)-4,4’diamine (NPB):ZnPc c-HTL. Meanwhile, we also investigate their mechanisms different from that in the case of using ZnPc as buffer layer. The specific analysis is based on the absorption spectra of the hole transporting material and current density–voltage characteristics of the corresponding hole-only devices.

关键词: organic light emitting diodes, composite hole transport layer, zinc phthalocyanine

Abstract: We demonstrate that the electroluminescent performances of organic light-emitting diodes are significantly improved by employing a zinc phthalocyanine (ZnPc)-based composite hole transport layer (c-HTL). The optimum ris-(8-hydroxyquinoline)aluminum (Alq3)-based organic light-emitting diode with a c-HTL exhibits a lower turn-on voltage of 2.8 V, a higher maximum current efficiency of 3.40 cd/A and a higher maximum power efficiency of 1.91 lm/W, which are superior to those of the conventional device (turn-on voltage of 3.8 V, maximum current efficiency of 2.60 cd/A, and maximum power efficiency of 1.21 lm/W). We systematically studied the effects of different kinds of N’-diphenyl-N,N’-bis(1-naphthyl)(1,1’-biphenyl)-4,4’diamine (NPB):ZnPc c-HTL. Meanwhile, we also investigate their mechanisms different from that in the case of using ZnPc as buffer layer. The specific analysis is based on the absorption spectra of the hole transporting material and current density–voltage characteristics of the corresponding hole-only devices.

Key words: organic light emitting diodes, composite hole transport layer, zinc phthalocyanine

中图分类号:  (Metal-insulator-semiconductor structures (including semiconductor-to-insulator))

  • 73.40.Qv
73.61.-r (Electrical properties of specific thin films) 73.90.+f (Other topics in electronic structure and electrical properties of surfaces, interfaces, thin films, and low-dimensional structures)