Highly Efficient Blue Organic Light-Emitting Diodes Based on Diarylamine-Substituted Pyrene Derivatives

Abstract

In this study, we designed and synthesized three blue fluorescence materials based on diarylamine-substituted pyrene derivatives. Organic Light Emitting-Diodes devices using these materials were fabricated in the following sequence; ITO/2-TNATA (300 angstrom)/NPB (200 angstrom)/alpha,beta-ADN: 10 wt% blue materials 1-3 (300 angstrom)/DNAB (300 angstrom)/Liq (20 angstrom)/Al (1000 angstrom). All devices showed highly efficient blue emissions. Particularly, a device using materials (3) shown highly efficient blue emission with luminous efficiency of 8.94 cd/A, power efficiency of 4.40 lm/W, external quantum efficiency of 6.62% at 20 mA/cm(2), respectively, and the CIE coordinates of (0.16, 0.23) at 6.0 V.