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:
Dec. 22, 2009
Filed:
Feb. 06, 2008
Masataka Takeuchi, Chiba, JP;
Shuichi Naijo, Chiba, JP;
Naoko Ito, Chiba, JP;
Koro Shirane, Chiba, JP;
Takeshi Igarashi, Chiba, JP;
Yoshiaki Takahashi, Chiba, JP;
Motoaki Kamachi, Chiba, JP;
Masataka Takeuchi, Chiba, JP;
Shuichi Naijo, Chiba, JP;
Naoko Ito, Chiba, JP;
Koro Shirane, Chiba, JP;
Takeshi Igarashi, Chiba, JP;
Yoshiaki Takahashi, Chiba, JP;
Motoaki Kamachi, Chiba, JP;
Showa Denko K.K., Tokyo, JP;
Abstract
A polymer light emitting material, wherein the material has a light emitting mechanism based on transition from an excited triplet state to a ground state or transition through an excited triplet state to a ground state of an electron energy level, and the material comprises a nonionic light emitting part which constitutes a part of the polymer or is bound to the polymer. The polymer light emitting material exhibits high light emission efficiency above 5%, which is the limit of external quantum efficiency of fluorescence and can be designed so as to have a large area and hence are suitable for mass production of organic light emitting devices.