Title:
発光装置、表示装置、電子機器、及び照明装置
Document Type and Number:
Japanese Patent JP6785544
Kind Code:
B2
Abstract:
Provided is a light-emitting element including a fluorescence-emitting material with high emission efficiency. The light-emitting element includes a pair of electrodes and an EL layer between the pair of electrodes. The EL layer includes a first organic compound, a second organic compound, and a guest material. The first organic compound has a function of emitting a thermally activated delayed fluorescence at room temperature. The guest material has a function of emitting fluorescence. A HOMO level of the first organic compound higher than or equal to a HOMO level of the second organic compound. A LUMO level of the first organic compound is lower than or equal to a LUMO level of the second organic compound.
More Like This:
| WO/2013/175868 | SURFACE-EMITTING ELEMENT |
| WO/2007/088690 | EL DEVICE |
| WO/2017/184969 | SOLID-STATE ORGANIC INTERMEDIATE-BAND PHOTOVOLTAIC DEVICES |
Inventors:
Tetsushi Seo
Nobuharu Osawa
Watanabe Gokichi
Nobuharu Osawa
Watanabe Gokichi
Application Number:
JP2015191051A
Publication Date:
November 18, 2020
Filing Date:
September 29, 2015
Export Citation:
Assignee:
Semiconductor Energy Laboratory Co., Ltd.
International Classes:
H01L51/50; C09K11/06; G09F9/30; H01L27/32
Domestic Patent References:
| JP2014045179A | ||||
| JP2008085142A | ||||
| JP2014031371A | ||||
| JP2011249698A |
Foreign References:
| US20140034930 | ||||
| CN103579530A |
Other References:
H.Nakanotani et al,Red fluorescence OLEDs with external EL quantum efficiency of over 17%,第61回応用物理学会春季学術講演会 講演予稿集,日本,応用物理学会,2014年 3月18日,18a-E3-7,第12-226頁
H.Tanaka, et al,Twisted Intramolecular Charge Transfer State for Long-Wavelength Thermally Activated Delayed Fluorescence,Chemistry of Materials,米国,American Chemical Society,2013年 9月 2日,Vol.25,p.3766-3771,Supporting Information(S6. Figure S10. and S11.)
H.Tanaka, et al,Twisted Intramolecular Charge Transfer State for Long-Wavelength Thermally Activated Delayed Fluorescence,Chemistry of Materials,米国,American Chemical Society,2013年 9月 2日,Vol.25,p.3766-3771,Supporting Information(S6. Figure S10. and S11.)