Pure white-light-emitting diodes from phosphorescent single polymer systems

Po I. Lee, Steve Lien Chung Hsu, Jung Feng Lee

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


New white polymeric light-emitting diodes from phosphorescent single polymer systems have been developed using a blue-light-emitting fluorene monomer copolymerized with a red-light-emitting phosphorescent dye, and end-capped with a green-light-emission dye. All of the copolymers have good thermal stability with 5% weight loss temperatures at 380-413 °C and glass transition temperatures at 75137 °C We obtained white-light-emission devices by adjusting the molar ratio of the comonomers with a structure of indium tin oxide/poly(3,4-ethylenedioxythiophene): poly(styrene sulfonic acid)/polyvinylcarbazole (PVK)/emission layer/Ca/Ag. The highest brightness in such a device configuration is 300 cd/m2 at a current density of 2900 A/m2 with high white color quality (Commission Internationale de l'Eclairage (CIE) coordinates of (0.33, 0.34)).

Original languageEnglish
Pages (from-to)464-472
Number of pages9
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Issue number2
Publication statusPublished - 2008 Jan 15

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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