Title:
LIGHT EMITTING ELEMENT, DISPLAY DEVICE, ELECTRONIC DEVICE, ORGANIC COMPOUND, AND LIGHTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/171197
Kind Code:
A1
Abstract:
Provided is a light emitting element having high luminous efficiency and reliability. This light emitting element includes a host material and a guest material in a light emitting layer. The host material serves to convert triplet excitation energy into luminescence, and the guest material emits fluorescence. The molecular structure of the guest material has a luminophore and protecting groups, wherein the number of the protecting groups contained in one guest material molecule is 5 or more. By introducing the protecting groups into the molecule, the energy transfer of the triplet excitation energy by the Dexter mechanism from the host material to the guest material is suppressed. As a protecting group, an alkyl group or a branched alkyl group is used.
Inventors:
SEO SATOSHI (JP)
OHSAWA NOBUHARU (JP)
HARUYAMA TAKUYA (JP)
TADA ANNA (JP)
OHSAWA NOBUHARU (JP)
HARUYAMA TAKUYA (JP)
TADA ANNA (JP)
Application Number:
PCT/IB2019/051403
Publication Date:
September 12, 2019
Filing Date:
February 21, 2019
Export Citation:
Assignee:
SEMICONDUCTOR ENERGY LAB (JP)
International Classes:
H01L51/50; C07C211/61; C07D471/04; C07F7/10; G02B5/20; H01L27/32; H05B33/12
Domestic Patent References:
| WO2015198988A1 | 2015-12-30 | |||
| WO2006098080A1 | 2006-09-21 | |||
| WO2018097153A1 | 2018-05-31 |
Foreign References:
| US20160104847A1 | 2016-04-14 | |||
| JP2002256168A | 2002-09-11 | |||
| JP2017502516A | 2017-01-19 |
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