WHITE ORGANIC ELECTROLUMINESCENCE ELEMENT

Title:

WHITE ORGANIC ELECTROLUMINESCENCE ELEMENT

Document Type and Number:

WIPO Patent Application WO/2005/011333

Kind Code:

A1

Abstract:

A white electroluminescence element (1) comprising an anode (2), a blue light emitting layer (5) containing a host material and a blue dopant, yellow through red light emitting layer (6) containing a host material identical to that of the blue light emitting layer (5) and a yellow through red dopant, and a cathode (8), formed sequentially in layers, wherein the light emitting layer is composed of the blue light emitting layer (5) and the yellow through red light emitting layer (6). In a type where the light emitting layer is divided into two, trend of color shift toward red can be canceled by employing the blue light emitting layer (5) on the anode (2) side where the light emitting region of the emitting layer has a trend to shift. Since the yellow through red light emitting layer (6) can be formed thick, variation of chromaticity can be suppressed.

Inventors:

FUKUOKA KENICHI (JP)
HOSOKAWA CHISHIO (JP)

Application Number:

PCT/JP2003/009525

Publication Date:

February 03, 2005

Filing Date:

July 28, 2003

Export Citation:

Click for automatic bibliography generation Help

Assignee:

IDEMITSU KOSAN CO (JP)
FUKUOKA KENICHI (JP)
HOSOKAWA CHISHIO (JP)

International Classes:

C09K11/06; H01L51/00; H01L51/50; H05B33/12; H05B33/14; H05B33/22; (IPC1-7): H05B33/12; H05B33/14; H05B33/22; C09K11/06

Domestic Patent References:

WO2001023497A1

2001-04-05

Foreign References:

JPH103990A	1998-01-06
JP2000182768A	2000-06-30
JP2001250690A	2001-09-14
JP2001244079A	2001-09-07
JPH10270171A	1998-10-09
JP2000100572A	2000-04-07
JPH0812600A	1996-01-16
JPH07142169A	1995-06-02

Other References: