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:
Jan. 23, 2007
Filed:
Apr. 29, 2005
Sergey A. Lamansky, Apple Valley, MN (US);
Manoj Nirmal, St. Paul, MN (US);
Fred B. Mccormick, Maplewood, MN (US);
Ralph R. Roberts, Cottage Grove, MN (US);
John P. Baetzold, North St. Paul, MN (US);
Todd D. Jones, St. Paul, MN (US);
Sergey A. Lamansky, Apple Valley, MN (US);
Manoj Nirmal, St. Paul, MN (US);
Fred B. McCormick, Maplewood, MN (US);
Ralph R. Roberts, Cottage Grove, MN (US);
John P. Baetzold, North St. Paul, MN (US);
Todd D. Jones, St. Paul, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Organic electroluminescent device can be formed with multiple layers including an electrode, an emission layer, and a buffer layer. The emission layer includes a light emitting material. The buffer layer is disposed between and in electrical communication with the electrode and the emission layer and includes a triarylamine hole transport material and an electron acceptor material. The buffer layer optionally includes one or more of a) a polymeric binder, b) a color converting material, and c) light scattering particles. The buffer layer can also be formed using a polymeric hole transport material having a plurality of triarylamine moieties.