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:
Jul. 09, 2019
Filed:
Feb. 17, 2016
Applicants:
Cambridge Display Technology Limited, Godmanchester, GB;
Sumitomo Chemical Company Limited, Tokyo, JP;
Inventors:
Michael Cass, Cambridge, GB;
Matthew Roberts, Cambridge, GB;
Florence Bourcet, Godmanchester, GB;
Andrey Nikolaenko, Godmanchester, GB;
Assignees:
Cambridge Display Technology Limited, Godmanchester, GB;
Sumitomo Chemical Company Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 51/00 (2006.01); C08G 61/12 (2006.01); C09K 11/06 (2006.01); H01L 51/50 (2006.01);
U.S. Cl.
CPC ...
H01L 51/0035 (2013.01); C08G 61/12 (2013.01); C08G 61/122 (2013.01); C09K 11/06 (2013.01); H01L 51/0043 (2013.01); C08G 2261/12 (2013.01); C08G 2261/148 (2013.01); C08G 2261/1412 (2013.01); C08G 2261/312 (2013.01); C08G 2261/3142 (2013.01); C08G 2261/3162 (2013.01); C08G 2261/3221 (2013.01); C08G 2261/3245 (2013.01); C08G 2261/3424 (2013.01); C08G 2261/411 (2013.01); C08G 2261/522 (2013.01); C08G 2261/524 (2013.01); C08G 2261/95 (2013.01); C09K 2211/1433 (2013.01); C09K 2211/1466 (2013.01); C09K 2211/1475 (2013.01); H01L 51/5004 (2013.01); H01L 51/5012 (2013.01); H01L 51/5016 (2013.01); H01L 2251/552 (2013.01);
Abstract
A polymer comprising a fluorescent light-emitting repeating unit comprising a group of formula ED-EA wherein ED is an electron-donating unit; EA is an electron-accepting unit; and a band gap Egof a charge-transfer state formed from the electron-donating unit and the electron-accepting unit is smaller than the bandgap of either the electron-accepting unit Egor that of the electron-donating unit Eg.