ORGANIC EL ELEMENT AND MANUFACTURING METHOD THEREOF

• Main Authors: NENDAI KENICHI, MIZUSAKI NAOKO, ABE HIROKI
• Format: Patent
• Language: English
• Published: 19.08.2013
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

PROBLEM TO BE SOLVED: To provide an organic EL element having a high luminous efficiency regardless of the drive period by reducing collapse of carrier balance while ensuring a high freedom in cavity designing, and a manufacturing method thereof.SOLUTION: An anode 105 is configured including a metal element Mof a metal such as Al or an alloy thereof. A hole injection layer 107 is formed above the anode 105 in a Z-axis direction, contains a first oxide MOx which is an oxide of a metal element Msuch as W and the composition ratio x of oxygen in at least a part of the layer is smaller than the stoichiometric ratio. A mixed layer 106 is formed abutting on the anode 105 and the hole injection layer 107 between the anode 105 and the hole injection layer 107, contains a second oxide MOy which is an oxide of the same metal as the metal element Mand the composition ratio y in at least a part of the layer is smaller than the stoichiometric ratio.