Material for organic electroluminescent device, light-emitting material, and organic electroluminescent device

An organic electroluminescent device comprising a pair of electrodes and one layer or plural layers including at least a light emitting layer intervening between the electrodes, the light emitting layer containing as a constitutional material thereof a light-emitting material comprising a benzonitrile derivative of the following general formula (1),

• wherein R1 to R5 may be the same or different, and each represent a hydrogen atom, a deuterium atom, a fluorine atom, a chlorine atom, nitro, linear or branched alkyl of 1 to 6 carbon atoms, which may have a substituent, cycloalkyl of 5 to 10 carbon atoms, which may have a substituent, linear or branched alkenyl of 2 to 6 carbon atoms, which may have a substituent, linear or branched alkyloxy of 1 to 6 carbon atoms, which may have a substituent, cycloalkyloxy of 5 to 10 carbon atoms, which may have a substituent, a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted condensed polycyclic aromatic group, a substituted or unsubstituted aryloxy group, or a disubstituted amino group substituted with a group selected from an aromatic hydrocarbon group, an aromatic heterocyclic group, and a condensed polycyclic aromatic group, and may bind to each other via a single bond, substituted or unsubstituted methylene, an oxygen atom, or a sulfur atom, to form a ring, provided that at least one of R1 to R5 represents a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted condensed polycyclic aromatic group, or a disubstituted amino group substituted with a group selected from an aromatic hydrocarbon group, an aromatic heterocyclic group, and a condensed polycyclic aromatic group,
• wherein the light-emitting material is used as a dopant material of the light emitting layer, and
• wherein R2 and R3 of the general formula (1) is a group selected from a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted condensed polycyclic aromatic group, and a disubstituted amino group substituted with a group selected from an aromatic hydrocarbon group, an aromatic heterocyclic group, and a condensed polycyclic aromatic group.

An organic electroluminescent device comprising a pair of electrodes and one layer or plural layers including at least a light emitting layer intervening between the electrodes, the light emitting layer containing as a constitutional material thereof a light-emitting material comprising a benzonitrile derivative of the following general formula (1),

• wherein R1 to R5 may be the same or different, and each represent a hydrogen atom, a deuterium atom, a fluorine atom, a chlorine atom, nitro, linear or branched alkyl of 1 to 6 carbon atoms, which may have a substituent, cycloalkyl of 5 to 10 carbon atoms, which may have a substituent, linear or branched alkenyl of 2 to 6 carbon atoms, which may have a substituent, linear or branched alkyloxy of 1 to 6 carbon atoms, which may have a substituent, cycloalkyloxy of 5 to 10 carbon atoms, which may have a substituent, a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted condensed polycyclic aromatic group, a substituted or unsubstituted aryloxy group, or a disubstituted amino group substituted with a group selected from an aromatic hydrocarbon group, an aromatic heterocyclic group, and a condensed polycyclic aromatic group, and may bind to each other via a single bond, substituted or unsubstituted methylene, an oxygen atom, or a sulfur atom, to form a ring, provided that at least one of R1 to R5 represents a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted condensed polycyclic aromatic group, or a disubstituted amino group substituted with a group selected from an aromatic hydrocarbon group, an aromatic heterocyclic group, and a condensed polycyclic aromatic group,
• wherein the light-emitting material is used as a dopant material of the light emitting layer, and
• wherein R2, R3 and R4 of the general formula (1) is a group selected from a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted condensed polycyclic aromatic group, and a disubstituted amino group substituted with a group selected from an aromatic hydrocarbon group, an aromatic heterocyclic group, and a condensed polycyclic aromatic group.