High thermal-stability benzocarbazole derivatives as bipolar host materials for phosphorescent organic light-emitting diodes

Yi Chen, Wenqing Liang, Wing Hong Choi, Jinhai Huang*, Qingchen Dong, Fu Rong ZHU, Jianhua Su

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

21 Citations (Scopus)

Abstract

Two novel host materials based on 5- and 9-substituted benzocarbazole have been developed for application in phosphorescent organic light-emitting diodes. Both host materials exhibit excellent thermal stability with high decomposition temperatures of ca.515 °C, while the 9-substituted benzocarbazole derivative exhibits a high glass transition temperature of 181 °C. Additionally, the electroluminescence characteristics of green phosphorescent organic light-emitting diodes made with two new host materials were also evaluated. The devices exhibited an electroluminescent emission peak at 528 nm with CIE coordinates of (0.31, 0.64) and possessed low turn-on voltages of <2.84 V.

Original languageEnglish
Pages (from-to)196-203
Number of pages8
JournalDyes and Pigments
Volume123
DOIs
Publication statusPublished - 26 Aug 2015

Scopus Subject Areas

  • Chemical Engineering(all)
  • Process Chemistry and Technology

User-Defined Keywords

  • Benzocarbazole derivatives
  • Bipolar
  • Green phosphorescent OLEDs
  • High thermal stability
  • Host materials
  • Low turn-on voltages

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