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

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 11943944
SERIAL NO

17423665

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A novel light-emitting device is provided. Alternatively, a light-emitting device having a long driving lifetime at high temperature is provided. The light-emitting device includes an anode, a cathode, and an EL layer positioned between the anode and the cathode. The EL layer includes a first layer, a second layer, a third layer, and a light-emitting layer in this order from the anode side. The first layer includes a first organic compound and a second organic compound. The second layer includes a third organic compound. The third layer includes a fourth organic compound. The light-emitting layer includes a fifth organic compound and an emission center substance. The first organic compound exhibits an electron-accepting property with respect to the second organic compound. A difference between HOMO levels of the fourth organic compound and the fifth organic compound is less than or equal to 0.24 eV.

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Patent Owner(s)

  • SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hashimoto, Naoaki Kanagawa, JP 92 499
Okuyama, Takumu Kanagawa, JP 14 4
Seo, Satoshi Kanagawa, JP 1449 27314
Suzuki, Tsunenori Kanagawa, JP 233 2559
Takita, Yusuke Kanagawa, JP 40 234

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