Organic electroluminescent device

US8362691B2 · kind B2 · utility

Assignee

• UDC IRELAND LIMITED · IE

Inventors

• Masaru Kinoshita · Yamakita, JP
• Manabu Tobise · Saitama, JP

Key dates

• Filing date: Jul 23, 2008
• Grant date: Jan 29, 2013
• Expiry date: Mar 13, 2029

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2102/103

Abstract

There is provided an organic electroluminescent device 10 having an anode 14, a cathode 18 disposed facing the anode, and an organic layer 16 that is sandwiched between the anode and the cathode and that includes at least a light emitting layer, wherein the light emitting layer includes a light emitting material having hole transportability, a host material having electron transportability and an electrically inert material, and the concentration of the light emitting material having hole transportability gradually increases from the cathode side toward the anode side. Preferably, the concentration of the electrically inert material also gradually increases from the cathode side toward the anode side.