Synthesis of Asymmetric Anthracene Derivatives and Their Application for Blue Organic Light‐emitting Diodes

Aryl-substituted asymmetric anthracene blue host materials, 10-naphthalene-2-yl-9-phenyl-2-triphenylsilylanthracene (6) and 9-(4-(tert-butyl)phenyl)-10-(2-methyl-5-(naphthalen-1-yl)phenyl)anthracene (7) were synthesized and characterized. Asymmetric anthracene derivatives 6 and 7 possessed high thermal stabilities that are suitable as emitting layer materials for blue organic light-emitting device. The electroluminescence emission maximum of BD-142-doped (7 wt %) two devices exhibited at 464 nm (for 6) and 472 nm (for 7), respectively. All devices showed good performances as blue host materials. The 7-based device especially displayed higher device performances in terms of brightness (L max = 37 090 cd/m2), luminous current density (7.26 cd/A), and external quantum efficiencies (5.80%) than those of 6-based device.