Patent ID: 7999459

Claim:
An organic light emitting diode (OLED) comprising: a first electrode; an organic layer on the first electrode and comprising an emission layer (EML) and an electron transport layer (ETL); and a second electrode on the organic layer; wherein the ETL comprises an organic metal complex comprising an alkali metal and a compound represented by Formula 1: wherein: each of R 1 to R 7 and R 16 to R 22 is independently selected from hydrogen atoms, phenyl groups, indenyl groups, naphthalenyl groups, benzofuranyl groups, benzothiophenyl groups, indolyl groups, benzimidazolyl groups, benzothiazolyl groups, purinyl groups, quinolinyl groups, isoquinolinyl groups, coumarinyl groups, cinnolinyl groups, quinoxalinyl groups, azulenyl groups, fluorenyl groups, dibenzofuranyl groups, carbazolyl groups, anthracenyl groups, phenanthrenyl groups, aziridinyl groups, 1,10-phenanthrolinyl groups, phenothiazinyl groups, and pyrenyl groups, and at least one of R 8 to R 15 is an aromatic heterocyclic group having 3 to 30 carbon atoms in which at least one ring of the group has two nitrogen atoms, and each of the rest of R 8 to R 15 is independently selected from hydrogen atoms, phenyl groups, indenyl groups, naphthalenyl groups, benzofuranyl groups, benzothiophenyl groups, indolyl groups, benzothiazolyl groups, quinolinyl groups, isoquinolinyl groups, coumarinyl groups, azulenyl groups, fluorenyl groups, dibenzofuranyl groups, carbazolyl groups, anthracenyl groups, phenanthrenyl groups, aziridinyl groups, phenothiazinyl groups, and pyrenyl groups with the proviso that a compound in which R 1 to R 8 , R 11 and R 12 , and R 15 to R 22 are hydrogen atoms, and one of R 9 , R 10 , R 13 and R 14 is the aromatic heterocyclic group having 3 to 30 carbon atoms in which at least one ring of the group has two nitrogen atoms is specially excluded.