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. 14, 2019
Filed:
Nov. 09, 2016
Applicant:
The Regents of the University of Michigan, Ann Arbor, MI (US);
Inventors:
Stephen R. Forrest, Ann Arbor, MI (US);
Jaesang Lee, Ann Arbor, MI (US);
Quinn Burlingame, Ann Arbor, MI (US);
Assignee:
THE REGENTS OF THE UNIVERSITY OF MICHIGAN, Ann Arbor, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 51/00 (2006.01); C09K 11/06 (2006.01); H01L 51/50 (2006.01);
U.S. Cl.
CPC ...
H01L 51/0072 (2013.01); C09K 11/06 (2013.01); H01L 51/0061 (2013.01); H01L 51/0074 (2013.01); H01L 51/0085 (2013.01); H01L 51/0087 (2013.01); H01L 51/5004 (2013.01); H01L 51/5028 (2013.01); C09K 2211/1007 (2013.01); C09K 2211/1014 (2013.01); C09K 2211/1029 (2013.01); C09K 2211/1044 (2013.01); C09K 2211/1092 (2013.01); C09K 2211/185 (2013.01); H01L 51/5016 (2013.01); H01L 51/5024 (2013.01); H01L 51/5056 (2013.01); H01L 51/5072 (2013.01); H01L 51/5096 (2013.01);
Abstract
An organic light emitting device is disclosed whose emissive layer has a host material, a first emissive dopant, and a second dopant. The second dopant is an excited energy state managing dopant provided in an amount between 2-10 vol. % of the emissive layer and has a lowest triplet state energy level, T, that is higher than a lowest triplet state energy levels, T, of both the host and the first dopant and lower than the multiply-excited energy level, T*, of the first dopant.