Electroluminescence element and electroluminescence panel

An electroluminescence element having a light emitting element layer containing a light emitting material between a lower electrode and an upper electrode, wherein

• the upper electrode comprises a first upper conductive layer formed through evaporation and a second upper conductive layer formed through sputtering, layered from a side near the light emitting element layer;
• a buffer layer for protecting at least the first upper conductive layer positioned below the buffer layer is provided between the first upper conductive layer and the second upper conductive layer;
• and
• the buffer layer has a multi-layer structure of a plurality of layers, each of which is an evaporated layer, wherein a buffer material of at least one layer in the multi-layer structure differs from a buffer material of the other layers;
• wherein the buffer layer comprises a first buffer layer containing a copper phthalocyanine complex derivative compound and a second buffer layer containing an aluminum-quinolinol complex derivative compound.

An electroluminescence element having a light emitting element layer containing a light emitting material between a lower electrode and an upper electrode, wherein

• a charge injection layer is formed on a side of the light emitting element near a contact interface with the upper electrode;
• the upper electrode comprises a first upper conductive layer formed through evaporation and a second upper conductive layer formed through sputtering, layered from a side near the charge injection layer of the light emitting element layer;
• and
• a buffer layer for protecting the first upper conductive layer and layers below the first upper conductive layer is provided between the first upper conductive layer and the second upper conductive layer, wherein
• the charge injection layer is an electron injection layer for lowering an electron injection barrier;
• the first upper conductive layer is an optically semi-transmissive metal layer;
• the buffer layer is an evaporated layer of an organic material containing an organic metal complex compound;
• and
• the second upper conductive layer contains a transparent conductive metal oxide material.

An electroluminescence element having a light emitting element layer containing a light emitting material between a lower electrode and an upper electrode, wherein

• a charge injection layer is formed on a side of the light emitting element near a contact interface with the upper electrode;
• the upper electrode comprises a first upper conductive layer formed through evaporation and a second upper conductive layer formed through sputtering, layered from a side near the charge injection layer of the light emitting element layer;
• and
• a buffer layer for protecting the first upper conductive layer and layers below the first upper conductive layer is provided between the first upper conductive layer and the second upper conductive layer, wherein
• the buffer layer has a multi-layered structure comprising a plurality of evaporated layers of organic materials including an organic metal complex compound.

An electroluminescence element having a light emitting element layer containing a light emitting material between a lower electrode and an upper electrode, wherein

• a charge injection layer is formed on a side of the light emitting element near a contact interface with the upper electrode;
• the upper electrode comprises a first upper conductive layer formed through evaporation and a second upper conductive layer formed through sputtering, layered from a side near the charge injection layer of the light emitting element layer;
• and
• a buffer layer for protecting the first upper conductive layer and layers below the first upper conductive layer is provided between the first upper conductive layer and the second upper conductive layer, wherein
• the buffer layer has a multi-layer structure of a plurality of layers, each of which is an evaporated layer, wherein a buffer material of at least one layer in the multi-layer structure differs from a buffer material of the other layers.

An electroluminescence panel comprising a plurality of electroluminescence elements in a display region, each of the electroluminescence element having a light emitting element layer containing a light emitting material between a lower electrode and an upper electrode, wherein

• the upper electrode of the electroluminescence element comprises a first upper conductive layer formed through evaporation and a second upper conductive layer formed through sputtering, layered from a side near the light emitting element layer;
• a buffer layer is provided between the first upper conductive layer and the second upper conductive layer;
• each layer of the upper electrode is formed covering an end portion of the light emitting element layer and extending to a position external to the position of the light emitting element layer in a periphery portion of the display region;
• and
• the buffer layer ends at a position internal to an ending position of the first upper conductive layer and the second upper conductive layer so that the first upper conductive layer and the second upper conductive layer contact each other near the ending position.