Organic electroluminescent element and light emitting device with light extraction portions

An organic electroluminescent element comprising:

• a first electrode;
• a substrate provided opposite to the first electrode;
• a reflective layer provided on the first electrode side of the substrate;
• an organic light emitting layer provided between the first electrode and the reflective layer;
• a second electrode provided between the organic light emitting layer and the reflective layer;
• an optical buffer layer provided between the second electrode and the reflective layer;
• and
• a plurality of light extraction portions provided between the optical buffer layer and the reflective layer, and the optical buffer layer being spaced from the reflective layer.

A light emitting device comprising:

• an organic electroluminescent element including:
• a first electrode;
• a reflective layer provided opposite to the first electrode;
• an organic light emitting layer provided between the first electrode and the reflective layer;
• a second electrode provided between the organic light emitting layer and the reflective layer;
• an optical buffer layer provided between the second electrode and the reflective layer;
• and
• a plurality of light extraction portions provided between the second electrode and the organic light emitting layer, the light extraction portions having a refractive index different from a refractive index of the optical buffer layer, and the plurality of light extraction portions contacting the second electrode;
• a driving unit configured to apply a current to the organic electroluminescent element;
• and
• a control unit configured to control the driving unit.

An organic electroluminescent element including:

• a first electrode;
• a substrate provided opposite to the first electrode;
• a reflective layer provided on the first electrode side of the substrate;
• an organic light emitting layer provided between the first electrode and the reflective layer;
• a second electrode provided between the organic light emitting layer and the reflective layer, and a space between the second electrode and the reflective layer being filled with a gas;
• and
• a plurality of light extraction portions provided between the second electrode and the reflective layer.