Diarylaminophenyl-substituted bianthracene derivatives for blue organic light-emitting diodes

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.

KEYWORDS:

• Organic Light-Emitting Diodes
• Blue emitter
• Bianthracene
• arylamine

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).