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:
Dec. 31, 2013
Filed:
Nov. 16, 2010
Masayuki Mitsuya, Chino, JP;
Masahisa Otake, Chino, JP;
Masayuki Mitsuya, Chino, JP;
Masahisa Otake, Chino, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A light-emitting device includes an anode; a cathode; a first light-emitting unit provided between the anode and the cathode and having at least one light-emitting layer; a second light-emitting unit provided between the cathode and the first light-emitting unit and having at least one light-emitting layer; and a carrier generation layer provided between the first light-emitting unit and the second light-emitting unit, the carrier generation layer generating holes and electrons in response to application of a voltage between the anode and the cathode. The carrier generation layer includes an n-type electron transport layer and an electron-withdrawing layer, the n-type electron transport layer being positioned between_the first light-emitting unit and the electron-withdrawing layer and containing alkali metal oxide and an electron-transporting material having electron transport properties, the electron-withdrawing layer contacting the n-type electron transport layer and containing organic cyanide having an aromatic ring.