Electron injection composition for light emitting element, light emitting element, and light emitting device

A light emitting device comprising:

• a substrate;
• and
• a light emitting element over the substrate,
• wherein the light emitting element further comprises a first electrode, a light emitting layer, an electron injection layer, and a second electrode,
• wherein the second electrode is transparent to visible light,
• wherein the electron injection layer comprises a material represented by general formula 1 and at least one of an alkali metal, an alkali earth metal, and a transition metal,
• wherein each of X1 and X2 represents:
• wherein R1 to R8 represents hydrogen, halogen, a cyano group, an alkyl group having 1 to 10 carbon atoms, a haloalkyl group having 1 to 10 carbon atoms, an alkoxyl group having 1 to 10 carbon atoms, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group.

A light emitting device comprising:

• a substrate;
• and
• a light emitting element over the substrate,
• wherein the light emitting element further comprises a first electrode, a light emitting layer, an electron injection layer, and a second electrode,
• wherein the first electrode and the second electrode is transparent to visible light,
• wherein the electron injection layer comprises a material represented by general formula 1 and at least one of an alkali metal, an alkali earth metal, and a transition metal,
• wherein each of X1 and X2 represents:
• wherein R1 to R8 represents hydrogen, halogen, a cyano group, an alkyl group having 1 to 10 carbon atoms, a haloalkyl group having 1 to 10 carbon atoms, an alkoxyl group having 1 to 10 carbon atoms, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group.

An light emitting device comprising:

• a substrate;
• and
• a light emitting element over the substrate,
• wherein the light emitting element further comprises:
• a first electrode;
• a light emitting layer over the first electrode;
• an electron injection layer over the light emitting layer;
• and
• a second electrode over the electron injection layer,
• wherein the electron injection layer comprises a material represented by general formula 1 and at least one of an alkali metal, an alkali earth metal, and a transition metal,
• wherein each of X1 and X2 represents:
• wherein R1 to R8 represents hydrogen, halogen, a cyano group, an alkyl group having 1 to 10 carbon atoms, a haloalkyl group having 1 to 10 carbon atoms, an alkoxyl group having 1 to 10 carbon atoms, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group.

A light emitting device comprising:

• a substrate;
• and
• a light emitting element over the substrate,
• wherein the light emitting element further comprises:
• a first electrode;
• a light emitting layer over the first electrode;
• an electron injection layer over the light emitting layer;
• and
• a second electrode over the electron injection layer,
• wherein the second electrode is transparent to visible light,
• wherein the electron injection layer comprises a material represented by general formula 1 and at least one of an alkali metal, an alkali earth metal, and a transition metal,
• wherein each of X1 and X2 represents:
• wherein R1 to R8 represents hydrogen, halogen, a cyano group, an alkyl group having 1 to 10 carbon atoms, a haloalkyl group having 1 to 10 carbon atoms, an alkoxyl group having 1 to 10 carbon atoms, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group.

A light emitting device comprising:

• a substrate;
• and
• a light emitting element over the substrate,
• wherein the light emitting element further comprises:
• a first electrode;
• a light emitting layer over the first electrode;
• an electron injection layer over the light emitting layer;
• and
• a second electrode over the electron injection layer,
• wherein the first electrode and the second electrode is transparent to visible light,
• wherein the electron injection layer comprises a layer including a material represented by general formula 1 and at least one of an alkali metal, an alkali earth metal, and a transition metal,
• wherein each of X1 and X2 represents:
• wherein R1 to R8 represents hydrogen, halogen, a cyano group, an alkyl group having 1 to 10 carbon atoms, a haloalkyl group having 1 to 10 carbon atoms, an alkoxyl group having 1 to 10 carbon atoms, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group.