Author/Authors :
Seong، نويسنده , , Nack-Chul and Jeon، نويسنده , , YoungMin and Lim، نويسنده , , Tae-Ho and Kim، نويسنده , , Joon Woo and Lee، نويسنده , , Chil-Won and Lee، نويسنده , , En-Jung and Jang، نويسنده , , Ji-Geun and Jang، نويسنده , , Hojeong and Lee، نويسنده , , Joon-Young and Gong، نويسنده , , Myoung-Seon، نويسنده ,
Abstract :
Novel distyrylarylene-based blue host materials, 4,4′-bis(1,2-diphenylvinyl)-p-terphenyl (2), 4,4′-bis[1-phenyl-2-(p-tolyl)vinyl]-p-terphenyl (3) and 4,4′-bis[1-phenyl-2-(4,4′-biphenyl)vinyl]-p-terphenyl (4) were successfully synthesized using 4,4′-bisbenzoyl-p-terphenyl (1) through Wittig–Hornor reaction and a blue organic light-emitting diode (OLED) was made from them. The structure of the blue device is ITO/DNTPD/NPB/Host:DSA-Ph/Alq3/Al-LiF. Here, NPB is used as a hole transport layer, DNTPD as the hole injection layer, DSA-Ph as the blue dopant, Alq3 as the electron transport layer and Al as the cathode. The blue device doped with 5%-DSA-Ph shows a blue EL spectrum at 463 nm and a high efficiency of 4.14–5.13 cd/A.
