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. 14, 2005
Jiro Tsukahara, Kanagawa, JP;
Tatsuya Igarashi, Kanagawa, JP;
Toshihiro Ise, Kanagawa, JP;
Yoshitaka Kitamura, Kanagawa, JP;
Jiro Tsukahara, Kanagawa, JP;
Tatsuya Igarashi, Kanagawa, JP;
Toshihiro Ise, Kanagawa, JP;
Yoshitaka Kitamura, Kanagawa, JP;
Fujifilm Corporation, Tokyo, JP;
Abstract
The present invention provides an organic electroluminescent element that includes a pair of electrodes and a plurality of organic compound layers being disposed between the pair of electrodes. The organic compound layers include a luminescent layer containing a blue phosphorescent luminescent material and a host material having the lowest excited triplet energy (T) of 272 kJ/mol (65 kcal/mol) or more, and hole transport layers. One of the hole transport layers is a layer adjacent to the luminescent layer, and when the ionization potentials of the luminescent layer, the hole transport layer adjacent to the luminescent layer, and another of the hole transport layers, respectively, designated to Ip, Ipand Ip, the relationship Ip>Ip>Ipis satisfied.