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:
Aug. 14, 2007
Filed:
Sep. 28, 2004
Yuji Hamada, Nara, JP;
Nobuo Saito, Gifu, JP;
Kazuki Nishimura, Hirakata, JP;
Hiroshi Kanno, Osaka, JP;
Yuji Hamada, Nara, JP;
Nobuo Saito, Gifu, JP;
Kazuki Nishimura, Hirakata, JP;
Hiroshi Kanno, Osaka, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
An organic electroluminescent device includes a hole-injecting electrode, an electron-injecting electrode and a blue light-emitting layer which is provided between the electrodes and contains a host material, a luminescent dopant and an assist dopant for complementing carrier transport of the host material. When the host material is an electron-transporting material, the assist dopant has a smaller absolute HOMO (Highest Occupied Molecular Orbital) energy level than the host material and a higher hole mobility than the host material.