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

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United States of America Patent

PATENT NO 11832465
APP PUB NO 20220328783A1
SERIAL NO

17834973

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Abstract

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Emission efficiency of a light-emitting element is improved. The light-emitting element has a pair of electrodes and an EL layer between the pair of electrodes. The EL layer includes a first light-emitting layer and a second light-emitting layer. The first light-emitting layer includes a fluorescent material and a host material. The second light-emitting layer includes a phosphorescent material, a first organic compound, and a second organic compound. An emission spectrum of the second light-emitting layer has a peak in a yellow wavelength region. The first organic compound and the second organic compound form an exciplex.

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Patent Owner(s)

  • SEMICONDUCTOR ENERGY LABORATORY CO. LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ishisone, Takahiro Kanagawa, JP 94 1489
Nonaka, Yusuke Kanagawa, JP 190 3096
Ohsawa, Nobuharu Kanagawa, JP 530 9353
Sasaki, Toshiki Kanagawa, JP 114 1918
Seo, Satoshi Kanagawa, JP 1463 27616

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