| 摘要 |
PROBLEM TO BE SOLVED: To provide a luminescent element having high luminance and a long life by containing pyrazine compound in at least one of layers containing organic compound sandwitched by a positive electrode and a negative electrode. SOLUTION: At least one of layers composed of organic compound is this organic luminescent element containing pyrazine compound represented by a formula (where R1-4 are H, a halogen atom, a cyano group, a nitro group, an ester group, an amino group, an alkyl group, an alkoxy group, an aryl group, or an aromatic complex ring group; Ar1-4 are an aryl group or an aromatic heterocyclic group). Ar1-4 are preferably polyphenylene such as a biphenyl group, triphenylamino group, a tarphenyl group, or an aromatic condensation multi-ring group such as a bipyridyl group or a carbazolyl group. A pyrazine compound film is formed in thickness less than 0.05-0.5μm between a positive electrode and a negative electrode, in a vacuum deposition method or a solution coating method combined with bonding resin. An organic layer containing a compound represented by a formula is suitable for an electron injection layer, an electron transportation layer, and a luminescent layer.
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