High-efficiency deep blue host for organic light-emitting devices Available to Purchase

High-efficiency deep blue organic light-emitting devices have been fabricated using asymmetrically substituted 9-(⁠$α$-naphthyl)-10-(⁠$β$-naphthyl)-anthracene as blue host material and diphenyl-[4-(2-$[1,1′;4′,1″]terphenyl$-4-yl-vinyl)-phenyl]amine as dopant emitter. With an optimized device structure and doping concentration, the deep blue electroluminescent (EL) device achieved an EL efficiency of $4.9cd∕A$ and an external quantum efficiency of 4.4% at a current density of $20mA∕cm2$ at saturated blue Commission Internationale de l’Eclairage coordinates of (0.15, 0.13). The deep blue device also has a current efficiency which is invariable with driving conditions ranging from $10to100mA∕cm2$⁠.