Light-emitting element, light-emitting device, electronic device, and lighting device

US10074822B2 · kind B2 · utility

Assignee

• Semiconductor Energy Laboratory Co., Ltd. · JP

Inventors

• Satoshi Seo · Yokohama, JP
• Tsunenori Suzuki · Yokohama, JP
• Takeyoshi WATABE · Yokohama, JP
• Kunihiko Suzuki · Yokohama, JP
• Toshiki Hamada · Yokohama, JP
• Rina NAKAMURA · Yokohama, JP
• Hayato YAMAWAKI · Yokohama, JP
• Ayumi Sato · Hiratsuka, JP
• Harue Osaka · Atsugi, JP

Key dates

• Filing date: Oct 26, 2015
• Grant date: Sep 11, 2018
• Expiry date: Oct 25, 2036

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K85/6576

Abstract

To provide a novel light-emitting element or a highly reliable light-emitting element. To provide a light-emitting device, a display device, an electronic device, and a lighting device each of which can be manufactured at a low cost. To provide a light-emitting element including an anode, a cathode, and an EL layer between the anode and the cathode. The EL layer includes a light-emitting layer and an electron injection transport layer between the light-emitting layer and the cathode, and the amount of a halogen detected from a material forming the electron injection transport layer is less than or equal to 30 ppm.