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Optoelectronics Letters

, Volume 15, Issue 2, pp 85–88 | Cite as

Efficient blue fluorescence tandem organic light emitting device with a novel intermediate connector

  • Ya-dong Liu (刘亚东)Email author
  • Ji-chao Li (李继超)
  • Jie Zhang (张杰)
  • Wang-jun Guo (郭旺军)
  • Zhi-sheng Wu (伍致生)
  • Yu-hua Mi (弥育华)
  • Xin-chao Song (宋新潮)
Article
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Abstract

A novel intermediate connector (IC) was formed which was composed of aluminum (Al, 3 nm)/1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile (HAT-CN). The 3-nm-thick Al in the IC is certified to efficiently generate intrinsic charge carriers, and the HAT-CN is proved to work as the holes injection layer (HIL) for the corresponding electroluminescent (EL) unit simultaneously. This simply IC comprehensively takes advantage of the features of the HAT-CN so as to stack two single EL units without introducing extra material. In addition to a significant enhancement in luminance and current efficiency, a current efficiency (CE) of 10.2 cd/A and a luminance of 2 042 cd/m2 under the current density 20 mA/cm2 of this tandem organic light emitting device (TOLED) are yielded, which are notably almost the sum of that of the two single-unit devices.

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Copyright information

© Tianjin University of Technology and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Ya-dong Liu (刘亚东)
    • 1
    Email author
  • Ji-chao Li (李继超)
    • 1
  • Jie Zhang (张杰)
    • 1
  • Wang-jun Guo (郭旺军)
    • 1
  • Zhi-sheng Wu (伍致生)
    • 1
  • Yu-hua Mi (弥育华)
    • 1
  • Xin-chao Song (宋新潮)
    • 1
  1. 1.Xi’an Modern Chemistry Research InstituteXi’anChina

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