Organic light-emitting diode, display and illuminating device

US8558224B2 · kind B2 · utility

Assignee

• Kabushiki Kaisha Toshiba · JP

Inventors

• Tomoaki Sawabe · Taito, JP
• Isao Takasu · Setagaya, JP
• Tomio Ono · Yokohama, JP
• Shintaro Enomoto · Yokohama, JP
• Takashi Kaneko · Sagamihara, JP
• Shinjiro Aono · Ozu, JP

Key dates

• Filing date: Sep 13, 2011
• Grant date: Oct 15, 2013
• Expiry date: Oct 15, 2031

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2101/40

Abstract

According to one embodiment, there is provided an organic light-emitting diode including an anode and a cathode which are arranged apart from each other, a red and green emissive layer on the anode side and a blue emissive layer on the cathode side, which are arranged to be separated from each other between the anode and the cathode, and a spacer layer which is inserted between the red and green emissive layer and the blue emissive layer, and consists of a hole transport material which prevents energy transfer from the blue emissive layer to the red and green emissive layer. The red and green emissive layer contains a host material having hole transportability, a red phosphorescent emitting dopant, and a green phosphorescent emitting dopant, and the blue emissive layer contains a host material having electron transportability and a blue fluorescent emitting dopant.