Organic electroluminescent device, display and illuminating device
View Patent ↗Disclosed is an organic EL device having high luminous efficiency and long emission life, wherein emission wavelength is controlled. Also disclosed are an illuminating device and a display. Specifically disclosed is an organic electroluminescent device containing at least a light-emitting layer sandwiched between an anode and a cathode. This organic electroluminescent device is characterized in that the light-emitting layer contains a metal complex having a partial structure represented by the following general formula (1).
1. An organic luminescent device having at least a light emission layer placed between an anode and a cathode, wherein the light emission layer contains an emission host and an emission dopant,
wherein the emission dopant is a metal complex having a partial structure represented by Formula (2), and a mixing ratio of the emission dopant to the emission host is 0.1 to 30 weight %
wherein,
Z 2 is a group of atoms necessary for forming an aromatic heterocyclic ring together with a N atom and X 22 ,
X 22 is a carbon atom or a nitrogen atom,
the formed aromatic heterocyclic ring is selected from the group consisting of pyrazole, oxazole, thiazole, tetrazole, pyridazine, pyrazine and triazine, and
M 2 is a metal element of Group VIII of the periodic table.
2. The organic luminescent device of claim 1 , wherein the metal element of Group VIII is iridium or platinum.
3. The organic luminescent device of claim 1 , which comprises a positive hole blocking layer as a constitution layer placed between the light emission layer and the cathode, wherein the positive hole blocking layer contains a carboline derivative or a derivative having a ring structure in which at least one of the carbon atoms of the hydrocarbon ring constituting the carboline ring of the carboline derivative is substituted by a nitrogen atom.
4. A display having the organic luminescent device of claim 1 .
5. An illumination device having the organic luminescent device of claim 1 .
6. The organic luminescent device of claim 1 , wherein the emission host is selected from the group consisting of a carbazole derivative, a triarylamine derivative, an aromatic borane derivative, a nitrogen-containing heterocyclic derivative, a thiophene derivative, a furan derivative and an oligoarylene compound, and a carboline derivative, or derivative having a ring structure in which at least one of carbon atoms of the hydrocarbon ring constituting the carboline ring of the carboline derivative is substituted by a nitrogen atom.