Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Shunpei Yamazaki0
Yasuhiko Takemura0
Harue Osaka0
Hideko Inoue0
Hiroshi Kadoma0
Kunihiko Suzuki0
Nobuharu Ohsawa0
Satoko Shitagaki0
...
Date of Patent
February 23, 2021
0Patent Application Number
167044610
Date Filed
December 5, 2019
0Patent Citations
Patent Citations Received
Patent Primary Examiner
Patent abstract
A light-emitting element includes a light-emitting layer including a guest, an n-type host and a p-type host between a pair of electrodes, where the difference between the energy difference between a triplet excited state and a ground state of the n-type host (or p-type host) and the energy difference between a triplet excited state and a ground state of the guest is 0.15 eV or more. Alternatively, in such a light-emitting element, the LUMO level of the n-type host is higher than the LUMO level of the guest by 0.1 eV or more, or the HOMO level of the p-type host is lower than the HOMO level of the guest by 0.1 eV or more.
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