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:
Nov. 01, 2011
Filed:
Sep. 08, 2004
Kazumi Nii, Minami-Ashigara, JP;
Tatsuya Igarashi, Minami-Ashigara, JP;
Saisuke Watanabe, Minami-Ashigara, JP;
Toshihiro Ise, Minami-Ashigara, JP;
Hisashi Okada, Minami-Ashigara, JP;
Kazumi Nii, Minami-Ashigara, JP;
Tatsuya Igarashi, Minami-Ashigara, JP;
Saisuke Watanabe, Minami-Ashigara, JP;
Toshihiro Ise, Minami-Ashigara, JP;
Hisashi Okada, Minami-Ashigara, JP;
Fujifiilm Corporation, Tokyo, JP;
Abstract
An organic electroluminescent device comprising a pair of electrodes and a light emitting layer, a hole transport layer containing a hole transporting material, and an electron transport layer provided between the pair of electrodes wherein, the light emitting layer contains at least two host materials and at least one red phosphorescent material, and the hole transporting material in the hole transport layer has a small ionization potential than the two host materials in the light emitting layer.