A synthesis and luminescence study of Ir(ppz)3 for organic light-emitting devices

被引：36

作者：

Nam, EJ

Kim, JH

Kim, BO

Kim, SM

Park, NG

Kim, YS

Kim, YK

Ha, Y ^{[1
]}

机构：

[1] Hongik Univ, Coll Engn, Dept Sci, Seoul, South Korea

[2] Hongik Univ, Dept Elect Engn, Seoul, South Korea

[3] Hongik Univ, Sci & Technol Res Inst, Seoul, South Korea

来源：

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN | 2004年 / 77卷 / 04期

关键词：

D O I：

10.1246/bcsj.77.751

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Tris(1-phenyl-kappaC(1) -pyrazolato-kappaN(2))iridium (lr(ppz)(3)) was prepared and its luminescence properties were investigated for the application to organic light-emitting devices (OLEDs). The photoluminescence (PL) spectra of Ir(ppz)(3) in dichloromethane showed a peak at 437 nm at room temperature. The luminescent lifetime of an lr(ppz)(3) film doped in CBP was found to be 2 18 ns. which indicated that its emission is phosphorescent. OLEDs were fabricated with doped films of lr(ppz)(3) in several hosts. and the electroluminescence (EL) peak was observed at 450 nm. The luminance of OLEDs was pure blue. with the CIE coordinates of x = 0. 158, y = 0. 139 at 100 cd/m(2) , but luminous efficiencies were low since the LUMO of Ir(ppz)(3) is higher than those of the hosts used.

引用

页码：751 / 755

页数：5

共 27 条

[1] High efficiency single dopant white electrophosphorescent light emitting diodes [J].