Electroluminescent device and method for producing the same
AssigneesHefei Boe Optoelectronics Technology Co., Ltd., Boe Technology Group Co., Ltd.
InventorsYuanhui Guo, Hui Wang, Chun Wang, Yisan Zhang
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Abstract
An electroluminescent device, comprising: a substrate; a first electrode and a second electrode disposed on the substrate; and an electroluminescent layer sandwiched between the first electrode and the second electrode, wherein at least one of the first and second electrodes is configured to have a grating structure; and wherein the grating structure has a grating period within a range of 0.9˜1.1 times of a wavelength of a light wave generated in the electroluminescent layer.
Claims18
An electroluminescent device, comprising:
- a substrate;
- a first electrode and a second electrode disposed on the substrate;
- and
- an electroluminescent layer sandwiched between the first electrode and the second electrode,
- wherein at least one of the first and second electrodes is configured to have a grating structure;
- and
- wherein the grating structure has a grating period within a range of 0.9˜1.1 times of a wavelength of a light wave generated in the electroluminescent layer;
- wherein the first electrode comprises:
- a first metal film layer, in which a plurality of holes are disposed in an array to form a first grating structure;
- and
- a second metal film layer covered on the first metal film layer to form a second grating structure,
- wherein on one side of the second metal film layer a plurality of protrusions corresponding to the plurality of holes are formed and protruded into the respective holes of the first metal film layer, and
- wherein on the other side of the second metal film layer a plurality of recesses corresponding to the plurality of protrusions are formed.
A method for producing an electroluminescent device, comprising steps of:
- forming a first electrode having a grating structure on a substrate;
- forming an electroluminescent layer, the first electrode being provided on one side of the electroluminescent layer;
- and
- forming a second electrode on the other side of the electroluminescent layer opposite to the one side,
- wherein the grating structure has a grating period within a range of 0.9˜1.1 times of a wavelength of a light wave generated in the electroluminescent layer;
- wherein the step of forming a first electrode having a grating structure on a substrate comprising steps of:
- spin coating a mixer containing polystyrene nanoparticles, methyl alcohol and dispersant on the substrate to form a polystyrene single molecular film on the substrate;
- performing a plasma treatment on the surface of the substrate to enhance an adhesion force between the polystyrene nanoparticles and the substrate;
- forming a first metal film layer on the substrate, wherein the first metal film layer having a thickness less than or equal to a diameter of the polystyrene nanoparticles;
- removing the polystyrene nanoparticles embedded in the first metal film layer to form a plurality of holes in the first metal film layer;
- and
- forming a second metal film layer on the first metal film layer in which the plurality of holes are formed.
Dependencies are inferred from the claim text.