ABSTRACT
In this study, we designed and synthesized blue emitting materials based on diarylaminophenyl-substituted bianthracene derivatives. Organic Light Emitting-Diodes (OLEDs) devices using these materials were fabricated in the following sequence; indium-tin-oxide (ITO) / N,N'-diphenyl-N,N'-(2-napthyl)-(1,1′-phenyl)-4,4′-diamine (NPB) (50 nm) / Blue materials 1 and 2 (30 nm) / 4,7-diphenyl-1,10-phenanthroline (BPhen) (30 nm) / lithium quinolate (Liq) (2 nm) / Al (100 nm). These devices showed efficient blue emissions. In particular, a device using compound 2 as blue emitter showed luminous efficiency, power efficiency, and external quantum efficiency of 2.47 cd/A, 1.16 lm/W, 2.45% at 20 mA/cm2, respectively, with Commission Internationale d’Énclairage (CIE) coordinates of (0.18, 0.25) at 8.0 V.
Funding
This research was supported by the Samsung Display and Basic Science Research Program through the NRF funded by the Ministry of Education, Science and Technology, South Korea (NRF-2013R1A1A2A10008105) and (NRF- 2015R1A6A1A03031833).