Light emitting element with light-emitting material in different concentrations
AssigneeFUJIFILM Corporation
InventorYoshitaka Kitamura
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Abstract
The present invention provides a light emitting element comprising a pair of electrodes and one or more organic compound layers including a luminescent layer disposed between the pair of electrodes. In this structure, the luminescent layer includes at least one charge transport material and at least one light emitting material, and comprises a laminated structure having two or more laminates including a plurality of layers including the light emitting material in different concentrations.
Claims15
A light emitting element comprising a pair of electrodes and one or more organic compound layers including a luminescent layer disposed between the pair of electrodes,
- wherein the luminescent layer includes two or more laminates and each laminate is a repeating unit consisting of a plurality of layers,
- wherein at least one of the same charge transport material is included in each of the plurality of layers and at least one of the same light emitting material is included in the plurality of layers,
- wherein respective layers of the repeating unit include the light emitting material at different concentrations, and wherein the concentration of the light emitting materials in a layer having the highest concentration of the light emitting material is at least twice that of the light emitting material in a layer having the lowest concentration of the light emitting material.
A light emitting element comprising a pair of electrodes and one or more organic compound layers including a luminescent layer disposed between the pair of electrodes,
- wherein the luminescent layer includes two or more laminates and each laminate is a repeating unit comprising a plurality of layers,
- wherein at least one of the same charge transport material is included in each of the plurality of layers and at least one of the same light emitting material is included in the plurality of layers,
- wherein respective layers of the repeating unit include the light emitting material at different concentrations, and wherein the concentration of the light emitting materials in a layer having the highest concentration of the light emitting material is at least twice that of the light emitting material in a layer having the lowest concentration of the light emitting material.
Dependencies are inferred from the claim text.