Electrophosphorescent Polyfluorenes Containing Osmium Complexes in the Conjugated Backbone

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

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Author(s)

  • Chen-Han Chien
  • Song-Fu Liao
  • Chen-Hao Wu
  • Ching-Fong Shu
  • Sheng-Yuan Chang
  • Pi-Tai Chou
  • Cheng-Hsuan Lai

Detail(s)

Original languageEnglish
Pages (from-to)1430-1439
Journal / PublicationAdvanced Functional Materials
Volume18
Issue number9
Online published29 Apr 2008
Publication statusPublished - 9 May 2008
Externally publishedYes

Abstract

Electrophosphorescent copolymers have been synthesized by covalent bonding of a red-emitting osmium complex Os(bpftz), which contains two 3-trifluoromethyl-5-(4-tert-butyl-2-pyridyl)triazolate (bpftz) cyclometalated ligands, into the backbone of a bipolar polyfluorene (PF) copolymer. Employing these copolymers, a highly efficient red polymer light-emitting diode has been realised that has an external quantum efficiency of 18.0%, a maximum brightness of 38 000 cd m-2, and an emission centered at 618 nm. In addition, after incorporating appropriate amounts of green-emitting benzothiadiazole (BT) and the aforementioned Os(bpftz) into the bipolar PF, an efficient white-light electroluminescent polymer is obtained that displays simultaneous blue, green, and red emissions.

Citation Format(s)

Electrophosphorescent Polyfluorenes Containing Osmium Complexes in the Conjugated Backbone. / Chien, Chen-Han; Liao, Song-Fu; Wu, Chen-Hao; Shu, Ching-Fong; Chang, Sheng-Yuan; Chi, Yun; Chou, Pi-Tai; Lai, Cheng-Hsuan.

In: Advanced Functional Materials, Vol. 18, No. 9, 09.05.2008, p. 1430-1439.

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