Organoelectroluminescent element, and light emission device, display device, and illumination device in which said organoelectroluminescent element is used
摘要
說明書
Substituents are appropriately selected for the purpose of controlling the emission wavelength and electric potential, but if the wavelength is to be lengthened, [the substituent is] preferably an electron-donating group or an aromatic ring group; for example, an alkyl group, a dialkylamino group, an alkoxy group, an aryl group, an aromatic heterocyclic group, or the like is selected. Furthermore, if the wavelength is to be shortened, [the substituent is] preferably an electron-withdrawing group; for example, a fluorine atom, a cyano group, a trifluoroalkyl group, or the like is selected.
An alkyl group, an aryl group, or an aromatic heterocyclic group is preferable as a substituent on a nitrogen atom, and from the standpoint of the stability of the complex, an alkyl group or an aryl group is preferable.
The substituents on Z21, Z22, Z23, and Z24 may be linked to each other to form a condensed ring, and examples of the ring thus formed include a benzene ring, a pyridine ring, a pyrazine ring, a pyridazine ring, a pyrimidine ring, an imidazole ring, an oxazole ring, a thiazole ring, a pyrazole ring, a thiophene ring, and a furan ring. When the substituents belonging to Z23 and Z24 link to each other, the platinum complex expressed by General Formula C-2 is a platinum complex of cyclic tetradentate ligand.
One of the more preferred modes of the platinum complex expressed by General Formula C-2 is a platinum complex expressed by General Formula C-3 below:
