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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9012034 B1

PDFFull Text
Date of Patent:
Apr. 21, 2015

Filed:

Sep. 26, 2007

Organic electroluminescence element

Applicants:

Masaru Kinoshita, Kanagawa, JP;

Manabu Tobise, Kanagawa, JP;

Inventors:

Masaru Kinoshita, Kanagawa, JP;

Manabu Tobise, Kanagawa, JP;

Assignee:

UDC Ireland Limited, Dublin, IE;

Attorney:

Riverside Law LLP

Primary Examiner:

J L Yang

Int. Cl.
CPC ...
H01J 1/63 (2006.01); C09K 11/06 (2006.01); H05B 33/14 (2006.01); H01L 51/00 (2006.01); H01L 51/50 (2006.01); H01L 51/52 (2006.01);
U.S. Cl.
CPC ...
C09K 11/06 (2013.01); C09K 2211/1007 (2013.01); C09K 2211/1011 (2013.01); C09K 2211/1014 (2013.01); C09K 2211/1029 (2013.01); C09K 2211/1033 (2013.01); C09K 2211/1044 (2013.01); C09K 2211/1088 (2013.01); C09K 2211/1092 (2013.01); C09K 2211/182 (2013.01); C09K 2211/185 (2013.01); H01L 51/006 (2013.01); H01L 51/0067 (2013.01); H01L 51/0071 (2013.01); H01L 51/0085 (2013.01); H01L 51/0089 (2013.01); H01L 51/5012 (2013.01); H01L 51/5016 (2013.01); H01L 51/5096 (2013.01); H01L 51/5237 (2013.01); H01L 51/5265 (2013.01); H01L 51/5278 (2013.01); H01L 2251/552 (2013.01); H05B 33/14 (2013.01);
Abstract

An organic electroluminescence element includes at least a light-emitting layer between a pair of electrodes, wherein the light-emitting layer is divided into at least three layers, an intermediate layer containing an electron blocking material or a hole blocking material is disposed between the divided light-emitting layers, an Ea value of the electron blocking material is smaller than an Ea value of a host material of the divided light-emitting layer adjacent on a cathode side or an Ip value of the hole blocking material is larger than an Ip value of a host material of the divided light-emitting layer adjacent on the anode side of the intermediate layer, and a difference of ΔEa or ΔIp is controlled to specific range.

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