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

TW202636833APending Publication Date: 2026-09-01SEMICON ENERGY LAB CO LTD
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Patent Information

Application Number
TW114143020
Authority / Receiving Office
TW · TW
Patent Type
Applications
Current Assignee / Owner
Priority Date
2015-12-04
Filing Date
2016-09-20
Publication Date
2026-09-01

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Abstract

To provide a light-emitting element with high emission efficiency and low driving voltage. The light-emitting element includes a guest material and a host material. A HOMO level of the guest material is higher than a HOMO level of the host material. An energy difference between the LUMO level and a HOMO level of the guest material is larger than an energy difference between the LUMO level and a HOMO level of the host material. The guest material has a function of converting triplet excitation energy into light emission. An energy difference between the LUMO level of the host material and the HOMO level of the guest material is larger than or equal to energy of light emission of the guest material.
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