DOPANT FOR ORGANIC OPTOELECTRONIC DEVICE, ORGANIC OPTOELECTRONIC DEVICE, AND DISPLAY DEVICE
申请人:SAMSUNG SDI CO., LTD.
公开号:US20180291264A1
公开(公告)日:2018-10-11
The present invention relates to: a dopant for an organic optoelectronic device, represented by chemical formula 1; an organic optoelectronic device including the dopant; and a display device.
LIGHT-EMITTING ELEMENT, DISPLAY DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE
申请人:Semiconductor Energy Laboratory Co., Ltd.
公开号:US20170040553A1
公开(公告)日:2017-02-09
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 LUMO level of the host material is higher than a LUMO level of the host material, and a HOMO level of the guest material is lower than a HOMO level of the host material. The guest material has a function of converting triplet excitation energy into light emission. The difference between a singlet excitation energy level and a triplet excitation energy level of the host material is greater than 0 eV and less than or equal to 0.2 eV. The energy difference between the LUMO level and the HOMO level of the host material is larger than or equal to light emission energy of the guest material.
BIS-CARBAZOLE DERIVATIVE AND ORGANIC ELECTROLUMINESCENT ELEMENT USING SAME
申请人:Idemitsu Kosan Co., Ltd.
公开号:EP2690093A1
公开(公告)日:2014-01-29
A biscarbazole derivative represented by formula (1):
wherein A1, A2, L1, L2, R1 to R4, and a to d are as defined in the specification, is useful as a material for forming organic EL devices and the organic EL devices including the derivative is capable of driving at a low voltage and has a long lifetime.
Provided is a novel compound or a light-emitting element with high emission efficiency. The provided novel compound includes a bicarbazole skeleton and a benzofuropyrimidine skeleton or a benzothienopyrimidine skeleton. The provided light-emitting element includes the compound.
Light-Emitting Element, Display Device, Electronic Device, and Lighting Device
申请人:Semiconductor Energy Laboratory Co., Ltd.
公开号:US20170092889A1
公开(公告)日:2017-03-30
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 LUMO level of the guest material is lower than a LUMO 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 guest material and the HOMO level of the host material is larger than or equal to energy of light emission of the guest material.