Organic compounds suitable for organic layers of electronic devices that show reduced driving voltage, increased luminous efficiency and/or increased power efficiency.

In the organic electroluminescent device having at least an anode, a hole injection layer, a first hole injection layer, a second hole injection layer, a light emitting layer, an electron transport layer and a cathode in this order, the hole injection layer includes an arylamine compound of the following general formula (1) and an electron acceptor.

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In the formula, Ar.sub.1 to Ar.sub.4 may be the same or different, and represent a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted condensed polycyclic aromatic group.

According to the present invention, there are provided pyrimidine derivatives represented by the following general formula (1). The pyrimidine derivatives of the invention are novel compounds and feature (1) good electron injection property, (2) high electron mobility, (3) excellent hole blocking property, (4) good stability in their form of thin films, and (5) excellent heat resistance.

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Provided is a varnish for the formation of a charge-transporting thin film, said varnish including an organic solvent, a charge-transporting substance, and a 2,2,6,6-tetraalkylpiperidine-N-oxyl derivative represented by formula (T1)

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(in the formula, each R.sup.A independently represents a C1-20 alkyl group, and R.sup.B represents a hydrogen atom, a hydroxy group, an amino group, a carboxyl group, a cyano group, an oxo group, an isocyanato group, a C1-20 alkoxy group, a C2-20 alkylcarbonyloxy group, a C7-20 arylcarbonyloxy group, a C2-20 alkylcarbonylamino group or a C7-20 arylcarbonylamino group).

Provided is a varnish for the formation of a charge-transporting thin film, said varnish including an organic solvent, a charge-transporting substance, and a 2,2,6,6-tetraalkylpiperidine-N-oxyl derivative represented by formula (T1)

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(in the formula, each R.sup.A independently represents a C1-20 alkyl group, and R.sup.B represents a hydrogen atom, a hydroxy group, an amino group, a carboxyl group, a cyano group, an oxo group, an isocyanato group, a C1-20 alkoxy group, a C2-20 alkylcarbonyloxy group, a C7-20 arylcarbonyloxy group, a C2-20 alkylcarbonylamino group or a C7-20 arylcarbonylamino group).

The present invention relates to a novel anthracene derivative, for an organic light-emitting device, and an organic light-emitting device comprising same, the anthracene derivative enabling excellent device characteristics when used as a light-emitting material.

The present specification relates to a double spiro structure compound, and an organic light emitting device comprising the same.

The present specification relates to a double spiro structure compound, and an organic light emitting device comprising the same.

The present invention relates to: a compound for an organic optoelectronic diode, represented by a combination of chemical formulas 1 and 2; an organic optoelectronic diode comprising the same; and a display device comprising the organic optoelectronic diode. The detailed contents of formulas 1 and 2 are the same as those defined in the specification.

Platinum, palladium, and gold tetradentate metal complexes of Formulas I and II including indoloacridine.

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The complexes are suitable for use as phosphorescent or delayed fluorescent and phosphorescent emitters in display and lighting applications.