ORGANIC ELECTROLUMINESCENCE ELEMENT AND ORGANIC ELECTROLUMINESCENCE DISPLAY

Title:

ORGANIC ELECTROLUMINESCENCE ELEMENT AND ORGANIC ELECTROLUMINESCENCE DISPLAY

Document Type and Number:

WIPO Patent Application WO/2004/060027

Kind Code:

A1

Abstract:

An organic EL element includes an anode, a positive hole injection layer, a first carrier transportation layer, a first light emitting layer, a second carrier transportation layer, a second light emitting layer, an electron transportation layer, and a cathode successively formed on a glass substrate. The first and the second carrier transportation layers have smaller electronic affinity Ea and a greater energy gap Eg than the first and the second light emitting layers, thereby improving the light emitting efficiency of the first and the second light emitting layers.

Inventors:

KINOSHITA MASARU (JP)
ITAI YUICHIRO (JP)
NAKAYAMA MASAYA (JP)
KODAMA JUN (JP)

Application Number:

PCT/JP2002/013546

Publication Date:

July 15, 2004

Filing Date:

December 25, 2002

Export Citation:

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Assignee:

FUJITSU LTD (JP)
KINOSHITA MASARU (JP)
ITAI YUICHIRO (JP)
NAKAYAMA MASAYA (JP)
KODAMA JUN (JP)

International Classes:

C09K11/06; H01L51/50; H01L51/52; H05B33/12; H05B33/14; H01L51/00; (IPC1-7): H05B33/22; H05B33/14

Domestic Patent References:

WO1997020355A1

1997-06-05

Foreign References:

JPH0636877A	1994-02-10
JPH05326146A	1993-12-10
JP2000030868A	2000-01-28
US5674597A	1997-10-07
US20010031509A1	2001-10-18
US20020027416A1	2002-03-07

Other References: