Organic electroluminescent element
AssigneeNippon Steel Chemical & Material Co., Ltd.
InventorsSayuri KITERA, Masashi TADA, Munetomo INOUE, Ayaka TERADA, Satoshi UKIGAI
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AssigneeNippon Steel Chemical & Material Co., Ltd.
InventorsSayuri KITERA, Masashi TADA, Munetomo INOUE, Ayaka TERADA, Satoshi UKIGAI
Estimating the term…
Provided is a blue light emitting organic EL device having high emission efficiency and a long lifetime. This organic EL device includes one or more light emitting layers between an anode and a cathode opposite to each other, wherein at least one of the light emitting layers has a difference between excited singlet energy (Si) and excited triplet energy (Ti) of 0.20 eV or less and includes a light emitting dopant represented by the following formula (5), a first host selected from biscarbazole compounds, and a second host selected from N-containing 6-membered ring compounds, wherein X3 is N—Ar4, O, or S and at least one X3 is N—Ar4.
An organic electroluminescent device comprising one or more light emitting layers between an anode and a cathode opposite to each other, wherein at least one of the light emitting layers comprises a first host selected from compounds represented by the following general formula (1), a second host selected from compounds represented by the following general formula (2), and a light emitting dopant selected from a polycyclic aromatic compound represented by the following general formula (4):
Dependencies are inferred from the claim text.