Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tsunenori Suzuki0
Naoaki Hashimoto0
Satoshi Seo0
Date of Patent
April 16, 2019
0Patent Application Number
151541210
Date Filed
May 13, 2016
0Patent Citations
Patent Citations Received
Patent Primary Examiner
Patent abstract
Provided is a novel light-emitting element, a light-emitting element with a long lifetime, or a light-emitting element with high emission efficiency. The light-emitting element includes an EL layer between a pair of electrodes. The EL layer includes at least a light-emitting layer containing a fluorescent substance and a host material, a first electron-transport layer containing a first electron-transport material, and a second electron-transport layer containing a second electron-transport material, which are in contact with each other and in this order. The LUMO level of each of the host material and the second electron-transport material is higher than the LUMO level of the first electron-transport material.
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