Display panel with variable micro-cavity lengths for sub-pixels, method for fabricating the same and display device
A display panel, a method for fabricating the same, and a display device are provided. The display panel includes: a base substrate, and a plurality of pixels in an array on the base substrate, wherein each pixel includes a plurality of sub-pixels; each sub-pixel includes: a reflecting element on the base substrate, a first electrode on the reflecting element, a light-emitting element on the first electrode, and a second electrode on the light-emitting element; and in each of the pixels, micro-cavity lengths corresponding to the sub-pixels are different, wherein the micro-cavity length is the distance between the side of the reflecting element away from the base substrate and the side of the second electrode proximate to the base substrate.
1. A display panel, comprising: a base substrate, and a plurality of pixels in an array on the base substrate, wherein:
at least one of the pixels comprises a plurality of sub-pixels;
at least one of the sub-pixels comprises: a reflecting element on the base substrate, a first electrode on the reflecting element, a light-emitting element on the first electrode, a second electrode on the light-emitting element, and a color filter layer on a side of the second electrode away from the base substrate; and
in at least one of the pixels, micro-cavity lengths corresponding to the plurality of sub-pixels are different, light emitted from the light-emitting element of each of the plurality of sub-pixels is white light, the light-emitting element of each of the plurality of sub-pixels comprises a red light-emitting layer, a green light-emitting layer, a blue light-emitting layer, and a charge generation layer, wherein a micro-cavity length is a distance between a side of the reflecting element away from the base substrate and a side of the second electrode proximate to the base substrate, the green light-emitting layer is on a side of the red light-emitting layer away from the base substrate, the blue light-emitting layer is on a side of the green light-emitting layer away from the base substrate, and the charge generation layer is between the green light-emitting layer and the blue light-emitting layer.
2. The display panel according to claim 1 , further comprising an insulation layer between reflecting surfaces of the reflecting elements and lower surfaces of the first electrodes; and
in at least one of the pixels, thicknesses of the insulating layer corresponding to the plurality of sub-pixels are different.
3. The display panel according to claim 2 , wherein at least one of the sub-pixels further comprises a connection structure running through the insulation layer, and the connection structure is electrically connected with the first electrode and the reflecting element.
4. The display panel according to claim 1 , wherein the micro-cavity length in at least one pixel increases as a wavelength of light emitted from a corresponding sub-pixel increases.
5. The display panel according to claim 1 , further comprising filling structures in gaps between adjacent sub-pixels; and
the filling structures are on a side of the first electrodes facing the base substrate.
6. A display device, comprising the display panel according to claim 1 .
7. The display panel according to claim 5 , wherein the filling structures are formed in a High-Density Plasma process.
8. The display panel according to claim 5 , wherein a width of the filling structure in an arrangement direction of the sub-pixels is less than 0.2 μm.