Light-emitting component and method for producing a light-emitting component
View Patent ↗A light-emitting component is provided including a functional layer stack having at least one light-emitting layer which is set up to generate light during the operation of the component, a first electrode and a second electrode, which are set up to inject charge carriers into the functional layer stack during operation, and an encapsulation arrangement having encapsulation material, which is arranged above at least one of the electrodes and the functional layer stack. At least one of the electrodes is transparent and contains a wavelength conversion substance and/or the encapsulation material is transparent and contains a wavelength conversion substance.
1. A light-emitting component, comprising
a functional layer stack having at least one light-emitting layer which is set up to generate light during the operation of the component,
a first electrode and a second electrode, which are set up to inject charge carriers into the functional layer stack during operation, and
an encapsulation arrangement having encapsulation material, which is arranged above at least one of the electrodes and the functional layer stack,
wherein
at least one of the electrodes is transparent and embedding a wavelength conversion substance, in which the wavelength conversion substance is embedded so that the wavelength conversion substance has a concentration gradient within the at least one electrode.
2. The component as claimed in claim 1 ,
wherein the encapsulation arrangement is designed as a thin film encapsulation having at least one encapsulation layer made of an oxide, nitride or oxinitride as an encapsulation material and the wavelength conversion substance is embedded in the encapsulation material of the at least one encapsulation layer.
3. The component as claimed in claim 1 ,
wherein the light-emitting component is designed as an organic light-emitting component in which the functional layer stack is designed as an organic functional layer stack having at least one organic light-emitting layer and which comprises the first electrode on a substrate, the functional layer stack above the substrate, the second electrode above that and the encapsulation arrangement above that.
4. The component as claimed in claim 3 ,
wherein the light-emitting component comprises a further encapsulation arrangement between the substrate and the first electrode, which comprises a wavelength conversion substance in an encapsulation material.
5. The component as claimed in claim 1 ,
in which the light-emitting component is designed as an inorganic light-emitting component, in which the functional layer stack is designed as an inorganic semiconductor layer sequence having at least one light-emitting layer.
6. The component as claimed in claim 1 ,
wherein the first electrode is transparent and contains a wavelength conversion substance.
7. The method as claimed in claim 1 ,
wherein the wavelength conversion substance is embedded so that at least one electrode includes a partial layer with the wavelength conversion substance and further includes a partial layer without the wavelength conversion substance.
8. A method for producing a light-emitting component comprising,
providing a functional layer stack having at least one light-emitting layer which is set up to generate light during the operation of the component,
providing a first electrode and a second electrode, which are set up to inject charge carriers into the functional layer stack during operation, and
providing an encapsulation arrangement having encapsulation material, which is arranged above at least one of the electrodes and the functional layer stack, the encapsulation arrangement comprising a plurality of the encapsulation layers, in which a wavelength conversion substance is embedded so that the wavelength conversion substance has a concentration gradient within the encapsulation arrangement,
wherein at least one of the electrodes is transparent and embedding a wavelength conversion substance and/or the encapsulation material is transparent and embedding a wavelength conversion substance,
in which during the construction of at least one transparent electrode, the wavelength conversion substance is embedded into a functional material of the layer, in which the wavelength conversion substance is embedded so that the wavelength conversion substance has a concentration gradient within the at least one electrode.
9. The method as claimed in claim 8 ,
in which the layer is produced together with the embedded wavelength conversion substance by using an atomic layer deposition method, a molecular layer deposition method or a chemical vapor phase deposition method.
10. The method as claimed in claim 8 ,
in which for producing the layer having the wavelength conversion substance, the wavelength conversion substance is fed together with at least one precursor material to a coating chamber, in which the layer having the wavelength conversion substance is produced.
11. The method as claimed in claim 10 ,
in which the wavelength conversion substance is fed to the coating chamber by means of a direct fluid injection method.
12. The method as claimed in claim 8 ,
wherein during the construction of two or more transparent layers selected from at least one of the electrodes and/or an encapsulation layer of the encapsulation arrangement, the wavelength conversion substance is embedded into a functional material of the layer.
13. The component as claimed in claim 8 ,
wherein the wavelength conversion substance is embedded so that at least one electrode includes a partial layer with the wavelength conversion substance and further includes a partial layer without the wavelength conversion substance.