Triphenylene-based Host Materials for Low-voltage, Highly Efficient Red Phosphorescent Organic Light-emitting Diodes
2013; Oxford University Press; Volume: 42; Issue: 4 Linguagem: Inglês
10.1246/cl.121247
ISSN1348-0715
AutoresKazunori Togashi, Takuma Yasuda, Chihaya Adachi,
Tópico(s)Luminescence and Fluorescent Materials
ResumoAbstract Triphenylene-based host materials BDBF-TP and BDBT-TP were synthesized for use in red phosphorescent organic light-emitting diodes (PHOLEDs). The current–voltage characteristics of hole- and electron-only devices revealed that BDBT-TP exhibits better bipolar carrier transport properties than 4,4′-bis(carbazol-9-yl)-1,1′-biphenyl and BDBF-TP. Red PHOLEDs containing BDBF-TP or BDBT-TP as the host showed a lower driving voltage, higher external quantum efficiency, and lower efficiency roll-off at high current density.
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