Carrier transport and high-efficiency electroluminescence properties of copolymer thin films

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Baijun Chen
  • Yunqi Liu
  • Gui Yu
  • S. T. Lee
  • Hongyu Li
  • W. A. Gambling
  • Daoben Zhu
  • He Tian
  • Weihong Zhu

Detail(s)

Original languageEnglish
Pages (from-to)173-177
Journal / PublicationThin Solid Films
Volume363
Issue number1
Publication statusPublished - 1 Mar 2000

Conference

TitleThe Asia-Pacific Symposium on Organic Electroluminescent Materials and Devices
CityHong Kong, Hong Kong
Period8 - 11 June 1999

Abstract

A novel copolymer with moieties capable of charge transport and electroluminescence was synthesized. The drift mobilities of electron and hole in the spin-coated films of the copolymer on silicon substrate have been determined by the time-of-flight technique. The shape of the photo-current curves obtained for the transport of both electron and hole is typical for dispersive transport in organic polymers. Under an electrical field strength of 5.0×105 V/cm, the drift mobility of electron and hole is 4.78×10-6 and 3.46×10-6 cm2/V s, respectively. A high-efficiency electroluminescent device with the bi-layer structure of ITO/copolymer/2-(4-biphenylyl)-5-(4-tert-butylphenl)-1,3,4,-oxadiazole (PBD) /LiF/Al was fabricated. The device emitted a bright blue-green light peaking at wavelength of 496 nm, originating from copolymer with a maximum current efficiency of 10 cd/A and a maximum luminescence efficiency of 2.9 lm/W at the DC drive voltage of 12 V.

Citation Format(s)

Carrier transport and high-efficiency electroluminescence properties of copolymer thin films. / Chen, Baijun; Liu, Yunqi; Lee, C. S.; Yu, Gui; Lee, S. T.; Li, Hongyu; Gambling, W. A.; Zhu, Daoben; Tian, He; Zhu, Weihong.

In: Thin Solid Films, Vol. 363, No. 1, 01.03.2000, p. 173-177.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review