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.:
Date of Patent:
Oct. 11, 2011
Filed:
Apr. 27, 2010
Organic electroluminescent device with carrier blocking layer interposed between two emitting layers
Takashi Arakane, Sodegaura, JP;
Hitoshi Kuma, Sodegaura, JP;
Hisayuki Kawamura, Sodegaura, JP;
Toshihiro Iwakuma, Sodegaura, JP;
Chishio Hosokawa, Sodegaura, JP;
Takashi Arakane, Sodegaura, JP;
Hitoshi Kuma, Sodegaura, JP;
Hisayuki Kawamura, Sodegaura, JP;
Toshihiro Iwakuma, Sodegaura, JP;
Chishio Hosokawa, Sodegaura, JP;
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Abstract
An organic electroluminescent device including in sequence an anode, a first emitting layer (), a carrier barrier layer (), a second emitting layer () and a cathode stacked; wherein the ionization potential of the carrier barrier layer () is more than the ionization potential of the first emitting layer () by 0.1 eV or more and the affinity level of the carrier barrier layer () is less than the affinity levels of the first emitting layer () and the second emitting layer () by 0.1 eV or more.