Novel blue emitters based on anthracene derivatives with naphthalene and phenylquinoline moieties for organic light-emtting diodes

Abstract

In this study, we have designed three blue emitters based on anthracene derivatives with electron withdrawing phenylquinoline moieties. To explore the electroluminescence properties of these materials as blue materials, multilayer blue organic light-emtting diodes (OLEDs) were fabricated in the following device structure: indium-tin-oxide (ITO)/4,4$-bis[N-(1-naphthyl)-N-phenylamino]biphenyl (NPB)/blue emitters (30 nm) bathophenanthroline (Bphen) (35 nm)/lithium quinolate (Liq) (2 nm)/Al. Among those, a device using 4-{4-[10-(naphthalen-2-yl)anthracen-9yl]phenyl}-2-phenylquinoline exhibited efficient blue emission with a luminous and power efficiency of 1.59 cd/A and 0.89 lm/W at 20 mA/cm 2 , respectively. The commission internationale de l'éclairage (CIE) coordinates of this device were (x = 0.17, y = 0.21) at 7.5 V.