Highly Efficient Organic Light-emitting Devices based on a New Yellow Fluorescent Dopant

Abstract

We have fabricated yellow organic light-emitting devices (OLEDs) with a new fluorescent small molecules, 3-(N,N-bis(9,9,9',9'-tetraethyl-2,2'-difluorene-7-yl))aminoperylene 1. The yellow dopant 1 was doped into the host material, tris(8-hydroxyquinolinolato) aluminum (Alq₃), with various doping concentration. At 1wt% of the concentration, the device showed the highest efficiency 4.05 % at 100 cd/m². Commission Internationale de I'Ecairage chromaticity coordinates (CIE) of the yellow emission of the device at 100 cd/m² was (0.42, 0.55).