Organic EL element, organic EL panel having organic EL element, organic EL light-emitting apparatus, and organic EL display apparatus

US9287520B2 · kind B2 · utility

Assignee

• JOLED INC. · JP

Inventors

• Hirofumi Fujita · Osaka, JP
• Yoshiaki Tsukamoto · Osaka, JP
• Shinya Fujimura · Susono, JP
• Satoru Ohuchi · Osaka, JP

Key dates

• Filing date: Oct 7, 2013
• Grant date: Mar 15, 2016
• Expiry date: Dec 21, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2101/30

Abstract

An organic EL element includes: an anode; a cathode; a buffer layer; and a hole injection layer between the anode and the buffer layer, the hole injection layer including a nickel oxide including both nickel atoms with a valence of three and nickel atoms with a valence of two. In the hole injection layer, a ratio of the number of nickel atoms with a valence of three to the number of nickel atoms with a valence of two, expressed in percentage, is equal to or greater than 60%.