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:
May. 29, 2007
Filed:
Feb. 20, 2002
Koro Shirane, Chiba, JP;
Motoaki Kamachi, Chiba, JP;
Naoko Ito, Chiba, JP;
Tamami Koyama, Chiba, JP;
Koro Shirane, Chiba, JP;
Motoaki Kamachi, Chiba, JP;
Naoko Ito, Chiba, JP;
Tamami Koyama, Chiba, JP;
Showa Denko K.K., Tokyo, JP;
Abstract
The invention relates to a light-emitting material having high emitting efficiency, high luminance and durability for use in an organic light-emitting device and to an organic electroluminescent (EL) device, in which the light-emitting material is used. The light-emitting material contains a light-emitting substance which is spatially constricted and confined in an order of two dimensions or more, thus providing a high efficient organic light-emitting device based on emission of phosphorescence from an excited triplet state.