Two novel blue phosphorescent host materials containing phenothiazine-5,5-dioxide structure derivatives

Feng-Ming Xie, Qingdong Ou, Qiang Zhang, Jiang-Kun Zhang, Guo-Liang Dai, Xin Zhao, Huai-Xin Wei

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2 Citations (Scopus)

Abstract

Two novel D-A bipolar blue phosphorescent host materials based on phenothiazine-5,5-dioxide: 3-(9H-carbazol-9-yl)-10-ethyl- 10H-phenothiazine-5,5-dioxide (CEPDO) and 10-butyl-3-(9H-carbazol-9-yl)-10H-phenothiazine-5,5-dioxide (CBPDO) were synthesized and characterized. The photophysical, electrochemical and thermal properties were systematically investigated. CEPDO and CBPDO not only have a high triplet energy but also show a bipolar behavior. Moreover, their fluorescence emission peaks are in the blue fluorescence region at 408 nm and the fluorescence quantum efficiency (φ) of CEPDO and CBPDO were 62.5% and 59.7%, respectively. Both CEPDO and CBPDO showed very high thermal stability with decomposition temperatures (Td) of 409 and 396 °C as well as suitable HOMO and LUMO energy levels. This preferable performance suggests that CEPDO and CBPDO are alternative bipolar host materials for the PhOLEDs.

Original languageEnglish
Pages (from-to)869-874
Number of pages6
JournalBeilstein Journal of Organic Chemistry
Volume14
DOIs
Publication statusPublished - 17 Apr 2018

Keywords

  • Host materials
  • Phenothiazine
  • Phosphorescence
  • Synthesis

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