US 2010/0059778 A1 · Organic Light Emitting Element

Abstract

An object of the present invention is to provide an organic light emitting element where light emitted from the light emitting layer is efficiently emitted to the outside, and thus, the efficiency of light emission is higher. The present invention provides an organic light emitting element where a first reflective electrode 22, an electron transport layer 23, a light emitting layer 24, a hole transport layer 25, a hole injection layer 26 and a second transparent electrode 27 are formed on a glass substrate 21, and a light extraction layer 28 having an average index of refraction of 1.4 made of titanium particles having an index of refraction of 2.6 and an average particle diameter of 150 nm and silica sol.

Claims9

Dependent claims

An organic light emitting element having a structure with at least a light emitting layer on a substrate and a pair of electrodes provided so as to sandwich said light emitting layer, where one of said pair of electrodes is a transparent electrode, characterized in that

the average index of refraction of a light extraction layer formed on said transparent electrode is 1.4 or higher in a region between the interface between said transparent electrode and said light extraction layer, and the point to which light exudes from said transparent electrode to said light extraction layer, and
microscopic particles forming said light extraction layer have an index of refraction of 2 or higher.

Dependencies are inferred from the claim text.

Organic Light Emitting Element

Life of this patent

Organic Light Emitting Element

Life of this patent

Abstract

Claims9