K. Okumoto, H. Kanno, Y. Hamada
Aug 23, 2006
Citations
1
Influential Citations
24
Citations
Journal
Journal of Applied Physics
Abstract
Three polyacene derivatives, 2-tert-butyl-9,10-di(2-naphthyl)anthracene (TBADN), 9,9′,10,10′- tetraphenyl-2,2′-bianthracene, and 5,6,11,12-tetraphenylnaphthacene (rubrene), are found to successfully function as hole-transporting layers (HTLs) in red organic light-emitting devices (OLEDs) using tetraphenyldibenzoperiflanthene as an emitter. Compared with an OLED with the most widely used HTL material, the arylamine derivative, 4,4′-bis(N-phenyl-1-naphthylamino)biphenyl (NPB), the OLEDs with the polyacene derivatives exhibit advantageous performance such as lower driving voltage, higher electroluminescence efficiency, or longer luminance lifetime, depending on the employed HTL material. Current efficiency of the red OLED with a TBADN HTL is 5.5cd∕A with Commission Internationale de L’Eclairage chromaticity coordinates of (x=0.66, y=0.34), which is much higher than the value of 2.1cd∕A with the same chromaticity for the OLED with a NPB HTL. The driving voltage and luminance lifetime of the red OLED with rubr...