Novel carbazole/pyridine-based host material for solution-processed blue phosphorescent organic light-emitting devices

3,6-Bis(3,5-di(pyridin-3-yl)phenyl)-9-phenyl-9H-carbazole, a novel host material for solution-processed blue phosphorescent organic light-emitting devices was synthesized by a Suzuki coupling reaction. The optical, electrochemical and thermal properties of this novel crabazole have been characterized. The compound exhibits a high glass-transition temperature (Tg = 161 °C) and high triplet energy (ET = 2.76 eV). Additionally, atomic force microscopy measurements indicate that high-quality amorphous films of this novel compound can be prepared by spin-coating. Solution-processed blue phosphorescent organic light-emitting devices were obtained using the carbazole as the host material for the phosphorescence emitter iridium(III) bis(4,6-difluorophenylpyridinato)- picolinate and their electroluminescence properties were evaluated.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A novel carbazole/pyridine-based host material BDPPC was synthesized by a Suzuki coupling reaction. ► BDPPC exhibits a high glass-transition temperature (Tg = 161 °C) and high triplet energy (ET = 2.76 eV). ► The maximum efficiency of the BDPPC-based solution-processed blue phosphorescence devices was 7.1 cd A−1.