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US 8,808,876 B2Granted
Light-emitting compound and organic electroluminescence device
AssigneeKabushiki Kaisha Toshiba
InventorsIsao Takasu, Ryoko Iida, Yukitami Mizuno, Shintaro Enomoto, Shuichi Uchikoga
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Abstract
A light-emitting compound includes two or more carbazole skeletons each having two or more fluorine atoms at 2-, 4-, 5- and 7-positions, the carbazole skeleton represented by the formula (1): where two or more of R2, R4, R5 and R7 are F and a remainder is H.
Claims6
An organic electroluminescence device, comprising:
- a light-emitting layer between a cathode and an anode,
- the light-emitting layer comprising
- a host material which is a light-emitting compound, and
- a blue-emitting dopant,
- wherein the host material is polyvinylcarbazole comprising a repeating unit comprising a carbazole skeleton having two fluorine atoms located at 2- and 7-positions, represented by the following formula:
2 more elements
Dependencies are inferred from the claim text.