Organic electroluminescent element

An organic electroluminescent element comprising;

• a hole injection electrode;
• an electron injection electrode;
• a light emitting layer disposed between the hole injection electrode and the electron injection electrode;
• a hole injection layer provided between the hole injection electrode and the light emitting layer;
• and
• an electron transport layer provided between the electron injection electrode and the light emitting layer;
• wherein a fluorocarbon layer is provided between the hole injection layer and the light emitting layer and wherein the electron transport layer is formed from a mixture of a first electron transporting material and a second electron transporting material, the first electron transporting material being a phenanthroline compound, and the second electron transporting material being a compound having a lower energy level of lowest unoccupied molecular orbital (LUMO) than the first electron transporting material.

An organic electroluminescent element comprising;

• a hole injection electrode;
• an electron injection electrode;
• a light emitting layer disposed between the hole injection electrode and the electron injection electrode;
• a hole injection layer provided between the hole injection electrode and the light emitting layer;
• and
• an electron transport layer provided between the electron injection electrode and the light emitting layer;
• wherein the hole injection layer is formed from a fluorocarbon layer and wherein the electron transport layer is formed from a phenanthroline compound or a mixture of a phenanthroline compound and an aluminum complex.