Patent ID: 6849346

Claim:
A thin film EL device comprising: an electron-injecting electrode containing at least two or more different metals having different work functions; a hole-injecting electrode paired with the electron-injecting electrode; and a functional layer provided between the electron-injecting electrode and the hole-injecting electrode and having a light-emitting function, wherein the electron-injecting electrode contains a metal compound represented by following chemical formula (1): wherein R 1 and R 2 each independently is one selected from the group consisting of a bridging ligand containing a nitrogen-containing aromatic ring, a bridging ligand containing a derivative of a nitrogen-containing aromatic ring, halogen, and a bridging ligand containing alkyl of 1 to 3 carbons, the nitrogen-containing aromatic ring and the derivative of the nitrogen-containing aromatic ring each having at least one nitrogen atom as coordinating atom; R 3, R 4, R 5 and R 6 each independently is one selected from the group consisting of hydrogen, alkyl, an aryl derivative, and a derivative of a nitrogen-containing aromatic ring having one nitrogen atom as coordinating atom; and M 1 is a central metal.