ORGANIC ELECTROLUMINESCENT DEVICE

WIPO Patent Application WO/2005/030901

A1

An organic electroluminescent device (organic EL device) utilizing phosphorescence is disclosed which has excellent luminous efficiency that enables high luminance at low current density and high driving stability. Such an organic electroluminescent device is applicable to display devices such as a flat panel display or illuminating devices. An organic electroluminescent device comprising an anode, an organic layer and a cathode formed in layers on a substrate is characterized in that at least one layer in the organic layer is a light-emitting layer containing a host material and a dopant material and a pyrazole compound having 2-4 pyrazole structures represented by the formula (I) below in a same molecule is used as the host material in the light-emitting layer. (I) (In the formula, Ar₁-Ar₃ independently represent a hydrogen or an aromatic hydrocarbon group which may have a substituent, and at least one of them is a group other than hydrogen.)

YOSHITAKE OSAMU (JP)
MIYAZAKI HIROSHI (JP)
SUZAKI DAISUKE (JP)
YAMADA YU (JP)

PCT/JP2004/013752

April 07, 2005

September 21, 2004

Click for automatic bibliography generation  

NIPPON STEEL CHEMICAL CO (JP)
JAPAN HYDRAZINE CO INC (JP)
YOSHITAKE OSAMU (JP)
MIYAZAKI HIROSHI (JP)
SUZAKI DAISUKE (JP)
YAMADA YU (JP)

C07D231/12; C09K11/06; H01L51/00; H01L51/50; H05B33/14; (IPC1-7): C09K11/06; H05B33/14

JP2001230079A	2001-08-24
JP2003109767A	2003-04-11
JP2003229275A	2003-08-15
JP2002305084A	2002-10-18
JP2002100476A	2002-04-05
JP2004146368A	2004-05-20

Naruse, Katsuo (TKK Nishishinbashi Bldg. 11-5, Nishi-shinbashi 2-chom, Minato-ku Tokyo, JP)

View/Download PDF      PDF Help

Previous Patent: ABSORPTIVE COMPOSITION FOR INFRARED RAY AND ABSORPTIVE RESIN COMPOSITION FOR INFRARED RAY

Next Patent: BAKERY FLUORESCENT LAMP