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:
Mar. 17, 2009
Filed:
Jul. 12, 2004
Viktor V. Jarikov, Rochester, NY (US);
Viktor V. Jarikov, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
An organic light-emitting device includes a light-emitting layer including a host, a dopant, and a hole-trapping material, wherein the hole-trapping material is provided at 0.01 to less than 5% by volume relative to the light-emitting layer volume, has an oxidation potential that is selected so that it is less than the oxidation potential of the host in order to serve as a hole trap, has an oxidation potential that is selected so as to avoid formation of a certain charge transfer complex between the hole-trapping material and the host if the charge transfer complex causes a reduction in the electroluminescent efficiency of the dopant, and has an oxidation potential that is selected so as to avoid formation of the charge transfer complex between the hole-trapping material and the dopant.