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US 2012/0256172 A1Published application
Organic electroluminescence device
AssigneeIdemitsu Kosan Co., Ltd.
InventorsHirokatsu Ito, Hiroyuki Saito, Yumiko Mizuki, Masahiro Kawamura, Yuichiro Kawamura
Life of this patent
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Abstract
An organic electroluminescence device sequentially includes an anode, an emitting layer, an electron-transporting region, and a cathode, the electron-transporting region including an electron-transporting material that includes a cyano group and an aromatic ring group.
Claims20
An organic electroluminescence device comprising, in order:
- an anode, an emitting layer, an electron-transporting region, and a cathode, the electron-transporting region comprising an electron-transporting material that comprises a cyano group and an aromatic ring group.
A compound comprising a cyano group and an aromatic ring group, having a formula (ET),
- AaL1-Ar1CN)b)c (ET)
- wherein L1 is a single bond or a substituted or unsubstituted (a+1)-valent aromatic ring group having 6 to 50 ring carbon atoms, Ar1 is a substituted or unsubstituted (1+b)-valent aromatic ring group having 6 to 50 ring carbon atoms, a, b, and c are each independently an integer from 1 to 3, and A is a fused aromatic ring group having a formula selected from the group consisting of formulas (A-1) to (A-12),
- wherein c of R1 to R12, R21 to R30, R31 to R40, R41 to R50, R51 to R60, R61 to R72, R73 to R86, R87 to R94, R95 to R104, R105 to R114, R115 to R124, or R125 to R134 bond to L1 as a single bond, and the remainder of R1 to R12, R21 to R30, R31 to R40, R41 to R50, R51 to R60, R61 to R72, R73 to R86, R87 to R94, R95 to R104, R105 to R114, R115 to R124, or R125 to R134 are each independently a hydrogen atom, a halogen atom, a cyano group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 10 ring carbon atoms, a substituted or unsubstituted silyl group, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, wherein adjacent groups among the remainder of R1 to R12, R21 to R30, R31 to R40, R41 to R50, R51 to R60, R61 to R72, R73 to R86, R87 to R94, R95 to R104, R105 to R114, R115 to R124, or R125 to R134 may bond to form a ring.
Dependencies are inferred from the claim text.