White-light-emitting diodes from single polymer systems based on polyfluorene copolymers with quinoxaline derivatives

Po I. Lee, Lien-Chung Hsu, Piyun Lin

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

White polymeric light-emitting diodes (WPLEDs) from a single polymer system were developed by incorporating 2,3-bis(4-methyloxyphenyl)quinoxaline and 5,8-bis(N,N-diphenylamino)-2,3-bis(4-methyloxyphenyl)quinoxaline into poly(9,9-dioctylfluorene). All copolymers showed good thermal stability with 5% weight loss temperatures above 420 °C, and glass transition temperatures ranged from 86 to 143 °C. Electroluminescence (EL) devices with indium tin oxide/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonic acid)/emission layer/Ca/Ag were found to emit white light with Commission Internationale de l'Eclairage (CIE) coordinates of (0.33, 0.40) and (0.30, 0.36). These devices exhibit a highest brightness of 12 300 cd/m2 and a maximum current efficiency of 2.56 cd/A.

Original languageEnglish
Pages (from-to)8051-8057
Number of pages7
JournalMacromolecules
Volume43
Issue number19
DOIs
Publication statusPublished - 2010 Oct 12

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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