CN219165069U

CN219165069U - Light-emitting element

Info

Publication number: CN219165069U
Application number: CN202222146806.4U
Authority: CN
Inventors: 徐国城; 严志成; 陈慧修; 朱克泰
Original assignee: Taizhou Guanyu Technology Co ltd
Current assignee: Taizhou Guanyu Technology Co ltd
Priority date: 2022-05-11
Filing date: 2022-08-15
Publication date: 2023-06-09
Anticipated expiration: 2032-08-15
Also published as: CN117119824A

Abstract

The present utility model relates to a light emitting element. The light emitting element comprises a light emitting array, a plurality of coating layers and an insulating photosensitive material layer. The light emitting array includes a first organic light emitting unit including a first electrode and a second organic light emitting unit including a second electrode. The plurality of coating layers comprise a first coating layer and a second coating layer, wherein the first coating layer coats a part of the upper surface of the first electrode and the side wall of the first electrode, and the second coating layer coats a part of the upper surface of the second electrode and the side wall of the second electrode. An insulating photosensitive material layer is located between the sidewall of the first electrode and the sidewall of the second electrode, wherein the insulating photosensitive material layer partially covers the upper surface of the first electrode.

Description

Light-emitting element

Technical Field

The present utility model relates to a light emitting device, and more particularly, to an organic light emitting device.

Background

Organic light emitting displays have been widely used in the highest-end electronic devices. However, due to the limitations of the prior art, the luminous efficiency and quality of the luminescent material cannot be effectively controlled, resulting in an unexpected optical effect of the device.

Disclosure of Invention

In the present disclosure, a light emitting device includes a light emitting array, a plurality of cladding layers, and an insulating photosensitive material layer. The light emitting array includes a first organic light emitting unit including a first electrode and a second organic light emitting unit including a second electrode. The plurality of coating layers comprise a first coating layer and a second coating layer, wherein the first coating layer coats a part of the upper surface of the first electrode and the side wall of the first electrode, and the second coating layer coats a part of the upper surface of the second electrode and the side wall of the second electrode. An insulating photosensitive material layer is located between the sidewall of the first electrode and the sidewall of the second electrode, wherein the insulating photosensitive material layer partially covers the upper surface of the first electrode.

In the present disclosure, a light emitting device includes a plurality of organic light emitting units, an insulating photosensitive material layer, and a plurality of cladding layers. The insulating photosensitive material layer covers the organic light-emitting unit, wherein the insulating photosensitive material layer is provided with a plurality of concave parts, and the concave parts are used for exposing a plurality of effective light-emitting areas of the organic light-emitting unit. Each coating layer surrounds the side wall of each organic light emitting unit, and each coating layer is arranged between the side walls of two adjacent organic light emitting units.

In the present disclosure, a method for manufacturing a light emitting device includes: providing a substrate; forming a plurality of electrodes on a substrate; forming a coating material layer on the electrode; patterning the coating material layer to form a plurality of coating layers surrounding a plurality of side walls of the electrodes and exposing a plurality of upper surfaces of the electrodes, wherein the coating layers are discontinuous with each other between the electrodes; disposing an insulating photosensitive material on the electrode and the cladding layer; patterning the insulating photosensitive material to form an insulating photosensitive material layer exposing a plurality of effective light emitting areas of the upper surface of the electrode; and disposing an organic light emitting material on the effective light emitting region of the electrode.

In some embodiments, the coating layer has an absorbance for light that is greater than an absorbance for the light of the insulating photosensitive material layer.

In some embodiments, the cladding layer is integrally formed with the insulating photosensitive material layer and is made of the same material.

In some embodiments, the cladding layer includes an electrical conductor, and the plurality of cladding layers are spaced apart from one another.

In some embodiments, the cladding layer comprises a metal, a resin, graphite, or any combination of the foregoing.

In some embodiments, the cladding layer includes a photosensitive material.

In some embodiments, the light emitting element further comprises a transparent substrate, wherein the organic light emitting unit is disposed on the transparent substrate.

In some embodiments, the first electrode has a first edge and a second edge opposite or adjacent to the first edge, a portion of the upper surface extends inwardly from the first edge a first distance, a portion of the upper surface extends inwardly from the second edge a second distance, and the first distance is greater than the second distance.

In some embodiments, the first electrode has a first edge and a second edge opposite or adjacent to the first edge, the insulating photosensitive material layer contacts a first region of the upper surface of the first electrode adjacent to the first edge and a second region adjacent to the second edge, the width of the first region is not equal to the width of the second region, and/or the area of the first region is not equal to the area of the second region.

In some embodiments, the first electrode and the second electrode are anodes and/or the first electrode and the second electrode comprise transparent conductive material.

In some embodiments, the first organic light emitting unit and the second organic light emitting unit emit light of the same wavelength.

In some embodiments, the organic light emitting material includes an Electron Transport Layer (ETL), an Electron Injection Layer (EIL), an emissive layer (EM), a Hole Blocking Layer (HBL), a Hole Injection Layer (HIL), a Hole Transport Layer (HTL), or any combination of the above.

In some embodiments, the cladding material layer is formed through a spin-on coating process or a deposition process.

In some embodiments, the cladding material layer is patterned through a photolithographic process.

Drawings

Fig. 1 is a top view illustrating an intermediate product of a light emitting element.

Fig. 2A is a top view of a light emitting element according to some embodiments.

Fig. 2B is a sectional view illustrating a line 2B-2B' in fig. 2A.

Fig. 3A is a top view of a light emitting element according to some embodiments.

Fig. 3B is a sectional view illustrating a line 3B-3B' in fig. 3A.

Fig. 4A is a top view of a light emitting element according to some embodiments.

Fig. 4B is a sectional view illustrating a line 4B-4B' in fig. 4A.

Fig. 4C is a top view of a light emitting element according to some embodiments.

Fig. 4D is a sectional view illustrating a line 4D-4D' in fig. 4C.

Fig. 5A is a cross-sectional view of a light-emitting element according to some embodiments.

Fig. 5B is a cross-sectional view of a light-emitting element according to some embodiments.

Fig. 6A is a top view of a light emitting element according to some embodiments.

Fig. 6B is a sectional view illustrating a line 6B-6B' in fig. 6A.

Fig. 7A is a top view of a light emitting element according to some embodiments.

Fig. 7B is a sectional view illustrating a line 7B-7B' in fig. 7A.

Fig. 8A to 13B illustrate a method for manufacturing a light-emitting device according to some embodiments.

Detailed Description

Fig. 1 is a top view illustrating an intermediate product of a light emitting element 10. The light emitting element 10 has a light emitting layer 20 and a cover layer 40 over the light emitting layer 20. For the light emitting layer 20, the spacers 30 may be designed to provide an array of recesses for accommodating an array of light emitting pixels. In some embodiments, the spacers 30 may comprise a light-sensitive material.

Fig. 2A is a top view of a light emitting element according to some embodiments, and fig. 2B is a cross-sectional view illustrating along line 2B-2B' in fig. 2A. In some embodiments, fig. 2B is a cross-sectional view illustrating along line A-A in fig. 1 and illustrates only the light emitting region. In some embodiments, fig. 2B is a cross-sectional view illustrating along line 2B-2B' in fig. 2A and illustrates only the light emitting region. The cover layer 40 is omitted here for brevity. The spacer 30 has a plurality of bumps 310 to define a light emitting pixel pattern. The recess is between two adjacent bumps 310 and provides a space to accommodate a light emitting pixel. Those skilled in the art will appreciate that the bumps 310 are shown in a broken away manner from the cross-sectional view of fig. 2B, but they may be connected to each other via other portions of the spacers 30 from the top view of fig. 1 and 2A.

In some embodiments, as shown in fig. 1, 2A and 2B, the light emitting element 10 includes a substrate 100, bumps 310 over the substrate 100, and a light emitting array. In some embodiments, the light emitting array includes a plurality of organic light emitting units (or referred to as light emitting pixels), for example, at least an organic light emitting unit 101 (or referred to as a first organic light emitting unit) and an organic light emitting unit 102 (or referred to as a second organic light emitting unit). In some embodiments, the organic

light emitting units

101 and 102 are between the bumps 310 and over the substrate 100. In some embodiments, the organic light emitting unit 101 and the organic light emitting unit 102 emit light of the same wavelength.

In some embodiments, the substrate 100 may include a Thin Film Transistor (TFT) array configured to correspond to light emitting pixels in the light emitting layer 20. The substrate 100 may include a plurality of capacitors. In some embodiments, more than one transistor is configured to form a circuit with a capacitor and a light emitting pixel.

In some embodiments, the organic light emitting unit 101 includes an electrode 215 (or referred to as a first electrode), an organic layer 269 (or referred to as a light emitting layer), and an electrode 216 (or referred to as a second electrode) on the organic layer 269. The organic light emitting unit 102 includes an electrode 225 (or referred to as a first electrode), an organic layer 269, and an electrode 216 (or referred to as a second electrode) on the organic layer 269. In some embodiments, electrode 216 is located over organic layer 269.

In some embodiments, the electrode 215 of the organic light emitting unit 101 and the electrode 225 of the organic light emitting unit 102 are anodes. In some embodiments, the electrode 215 of the organic light emitting unit 101 and the electrode 225 of the organic light emitting unit 102 comprise transparent conductive materials. In some embodiments, electrode 215 and electrode 225 are configured with one side connected to circuitry embedded in substrate 100 and the other side contacting organic layer 269.

In some embodiments, the second electrode 216 is patterned to cover only the effective light emitting area of each organic light emitting cell. In some embodiments, the second electrode 216 is in contact with the organic layer 269. The second electrode 216 may be a continuous film as shown in fig. 2B and is located over the organic layer 269 and the bump 310. In other words, the second electrode 216 is a common electrode of several organic light emitting units. In some embodiments, the second electrode 216 is a common electrode for all organic light emitting cells in the light emitting element.

In some embodiments, the organic layer 269 includes one or more layers of organic light emitting materials. The organic light emitting material includes an Electron Transport Layer (ETL), an Electron Injection Layer (EIL), an emission layer (EM), a Hole Blocking Layer (HBL), a Hole Injection Layer (HIL), a Hole Transport Layer (HTL), or any combination of the above.

In some embodiments, the organic layer 269 includes a first carrier-transporting layer 262 over the bumps 310 and the electrodes 215, a second carrier-transporting layer 263 over the first carrier-transporting layer 262, and an organic emissive layer 264 over the second carrier-transporting layer 263. In some embodiments, the organic layer 269 further includes a carrier injection layer 261 disposed between the electrode 215 and the first carrier transport layer 262. In some embodiments, the organic layer 269 further includes an organic carrier transport layer 265 disposed over the organic emissive layer 264. In some embodiments, the carrier injection layer 261 may be a hole injection layer, the first carrier transport layer 262 may be a first hole transport layer, the second carrier transport layer 263 may be a second hole transport layer, and the organic carrier transport layer 265 may be an electron transport layer.

In some embodiments, the bump 310 includes a portion of the cladding layer 200A and a portion of the insulating photosensitive material layer 300. In some embodiments, the bump 310 includes a portion of the cladding layer 200B and a portion of the insulating photosensitive material layer 300. In some embodiments, the bump 310 includes a portion of the cladding layer 200A, a portion of the cladding layer 200B, and a portion of the insulating photosensitive material layer 300. In some embodiments, the bump 310 is also referred to as a pixel definition layer (pixel defined layer, PDL).

In some embodiments, the cladding layer 200A surrounds the sidewalls of the organic light emitting unit 101. In some embodiments, the cladding layer 200A coats a portion 215P of the upper surface 215a of the electrode 215 and the sidewall 215S of the electrode 215. In some embodiments, the cladding layer 200A includes a through hole 200A1 for exposing a portion of the upper surface 215a of the electrode 215. In some embodiments, the cladding layer 200A is interposed between the sidewalls of adjacent organic light emitting cells 101 and the sidewalls of the organic light emitting cells 102.

In some embodiments, the cladding layer 200B surrounds the sidewalls of the organic light emitting cells 102. In some embodiments, the cladding layer 200B coats the portion 225P of the upper surface 225a of the electrode 225 and the sidewall 225S of the electrode 225.

In some embodiments, the cladding layer 200B includes a through hole 200B1 for exposing a portion of the upper surface 225a of the electrode 225. In some embodiments, the cladding layer 200B is interposed between the sidewalls of adjacent organic light emitting cells 101 and the sidewalls of the organic light emitting cells 102.

In some embodiments, the cladding layers 200A, 200B include electrical conductors, and the cladding layers 200A and 200B are spaced apart from each other. In some embodiments, the cladding layers 200A, 200B comprise metal, resin, graphite, or any combination of the foregoing. In some embodiments, the cladding layers 200A, 200B include a photosensitive material. In some embodiments, the cladding layers 200A, 200B include quantum dots (quantum dots) that have excellent light absorption efficiency. In some embodiments, the cladding layers 200A, 200B include a carbon black material, such as carbon black nanoparticles, carbon black-containing conductive fibers, or the like. In some embodiments, the cladding layers 200A, 200B comprise a blackbody material having an absorptivity of 90%, 95%, 99%, 99.5%, or 99.9% or more for visible light.

In some embodiments, the absorbance of the cladding layers 200A, 200B for a particular wavelength is greater than or equal to 50%. In some embodiments, the absorbance of the cladding layers 200A, 200B for a particular wavelength is greater than or equal to 60%. In some embodiments, the absorptivity of the cladding layers 200A, 200B is greater than or equal to 70% for a particular wavelength. In some embodiments, the absorbance of the cladding layers 200A, 200B is greater than or equal to 80% for a particular wavelength. In some embodiments, the absorbance of the cladding layers 200A, 200B for a particular wavelength is greater than or equal to 90%. In some embodiments, the absorbance of the cladding layers 200A, 200B for a particular wavelength is greater than or equal to 95%. In some embodiments, the absorbance of the cladding layers 200A, 200B is greater than or equal to 99% for a particular wavelength. In some embodiments, the absorbance of the cladding layers 200A, 200B for a particular wavelength is greater than or equal to 99.5%. In some embodiments, the absorbance of the cladding layers 200A, 200B for a particular wavelength is greater than or equal to 99.9%. In some embodiments, the specific wavelength is no greater than 400nm. In some embodiments, the specific wavelength is no greater than 350nm. In some embodiments, the specific wavelength is no greater than 300nm. In some embodiments, the specific wavelength is no greater than 250nm. In some embodiments, the specific wavelength is no greater than 200nm. In some embodiments, the specific wavelength is no greater than 150nm. In some embodiments, the specific wavelength is no greater than 100nm.

In some embodiments, electrode 215 has an edge 2151 and an edge 2152 opposite edge 2151, portion 215P of upper surface 215a of electrode 215 extends inward from edge 2151 a distance D1, portion 215P of upper surface 215a of electrode 215 extends inward from edge 2152 a distance D2, and distance D1 is greater than distance D2. In some embodiments, electrode 215 has an edge 2153 adjacent edge 2151, portion 215P of upper surface 215a of electrode 215 extends inward from edge 2153 by a distance D3, and distance D1 is greater than distance D3. In some embodiments, electrode 215 has an edge 2154 adjacent edge 2151, portion 215P of upper surface 215a of electrode 215 extends inward from edge 2154 by a distance D4, and distance D1 is greater than distance D4. In some embodiments, distance D1, distance D2, distance D3, and distance D4 may all be different. In some embodiments, at least two of distance D1, distance D2, distance D3, and distance D4 are the same.

In some embodiments, electrode 225 has an edge 2251 and an edge 2252 opposite edge 2251, portion 225P of upper surface 225a of electrode 225 extends inwardly from edge 2251 a distance D5, portion 225P of upper surface 225a of electrode 225 extends inwardly from edge 2252 a distance D6, and distance D5 is greater than distance D6. In some embodiments, electrode 225 has an edge 2153 adjacent edge 2251, portion 225P of upper surface 225a of electrode 225 extends inward from edge 2153 a distance D7, and distance D5 is greater than distance D7. In some embodiments, electrode 225 has an edge 2154 adjacent edge 2251, and portion 225P of upper surface 225a of electrode 225 extends inward from edge 2154 by a distance D8, and distance D5 is greater than distance D8. In some embodiments, distance D5, distance D6, distance D7, and distance D8 may all be different. In some embodiments, at least two of distance D5, distance D6, distance D7, and distance D8 are the same.

In some embodiments, the insulating photosensitive material layer 300 is located between the sidewall 215S of the electrode 215 and the sidewall 225S of the electrode 225. In some embodiments, the insulating photosensitive material layer 300 partially covers the upper surface 215a of the electrode 215. In some embodiments, the insulating photosensitive material layer 300 partially covers the upper surface 225a of the electrode 225. In some embodiments, the insulating photosensitive material layer 300 covers the organic light emitting unit 101 and the organic light emitting unit 102, and the insulating photosensitive material layer 300 has a plurality of recesses 300C, and the recesses 300C are used to expose a plurality of effective light emitting areas of the plurality of organic light emitting units, for example, the effective light emitting areas of the organic light emitting unit 101 and the effective light emitting areas of the organic light emitting unit 102.

In some embodiments, the cladding layers 200A, 200B are located below the insulating photosensitive material layer 300. In some embodiments, the cladding layers 200A, 200B embed (impregnated) the layer 300 of insulating photosensitive material. In some embodiments, the cladding layer 200A is located between the surrounding area (portion 215P and sidewall 215S) of the upper surface 215a of the electrode 215 and the insulating photosensitive material layer 300. In some embodiments, the cladding layer 200B is located between the surrounding area (portion 225P and sidewall 225S) of the upper surface 225a of the electrode 225 and the insulating photosensitive material layer 300.

In some embodiments, the center of the electrode 215 is not aligned with the center of the recess 300C above the electrode 215. In some embodiments, the center of the electrode 215 is not aligned with the center of the perforation 200A1 of the cladding 200A. In some embodiments, the center of electrode 225 is not aligned with the center of recess 300C above electrode 225.

In some embodiments, the center of the electrode 225 is not aligned with the center of the perforation 200B1 of the cladding 200B.

In some embodiments, the insulating photosensitive material layer 300 has an absorptivity of greater than or equal to 50% for a particular wavelength. In some embodiments, the insulating photosensitive material layer 300 has an absorptivity of greater than or equal to 60% for a particular wavelength. In some embodiments, the insulating photosensitive material layer 300 has an absorptivity of greater than or equal to 70% for a particular wavelength. In some embodiments, the insulating photosensitive material layer 300 has an absorptivity of greater than or equal to 80% for a particular wavelength. In some embodiments, the insulating photosensitive material layer 300 has an absorptivity of greater than or equal to 90% for a particular wavelength. In some embodiments, the insulating photosensitive material layer 300 has an absorptivity of greater than or equal to 95% for a particular wavelength. In some embodiments, the specific wavelength is no greater than 400nm. In some embodiments, the specific wavelength is no greater than 350nm. In some embodiments, the specific wavelength is no greater than 300nm. In some embodiments, the specific wavelength is no greater than 250nm. In some embodiments, the specific wavelength is no greater than 200nm. In some embodiments, the specific wavelength is no greater than 150nm. In some embodiments, the specific wavelength is no greater than 100nm. In some embodiments, the absorptivity of the cladding layers 200A, 200B for light having a specific wavelength is greater than the absorptivity of the insulating photosensitive material layer 300 for the light having the specific wavelength.

In some embodiments, the insulating photosensitive material layer 300 contacts the region R11 of the upper surface 215a of the electrode 215 adjacent to the edge 2151, and the insulating photosensitive material layer 300 contacts the region R12 of the upper surface 215a of the electrode 215 adjacent to the edge 2152, the width W1 of the region R11 not being equal to the width W2 of the region R12. In some embodiments, the area of region R11 is not equal to the area of region R12. In some embodiments, the insulating photosensitive material layer 300 contacts the region R13 of the upper surface 215a of the electrode 215 adjacent to the edge 2153, and the width W1 of the region R11 is not equal to the width W3 of the region R13. In some embodiments, the area of region R11 is not equal to the area of region R13. In some embodiments, the insulating photosensitive material layer 300 contacts the region R14 of the upper surface 215a of the electrode 215 adjacent to the edge 2154, and the width W1 of the region R11 is not equal to the width W4 of the region R14. In some embodiments, the area of region R11 is not equal to the area of region R14. In some embodiments, region R11, region R12, region R13, and region R14 of upper surface 215a of electrode 215 surround the effective light emitting area of upper surface 215a of electrode 215. In some embodiments, portion 215P of upper surface 215a of electrode 215 surrounds region R11, region R12, region R13, and region R14. In some embodiments, a portion of the insulating photosensitive material layer 300 surrounds the effective light emitting area of the upper surface 215a of the electrode 215. In some embodiments, a portion of the insulating photosensitive material layer 300 contacts the annular region (i.e., region R11, region R12, region R13, and region R14) between the effective light emitting region of the upper surface 215a of the electrode 215 and the portion 215P.

In some embodiments, the insulating photosensitive material layer 300 contacts the region R11 of the upper surface 225a of the electrode 225 adjacent the edge 2251, and the insulating photosensitive material layer 300 contacts the region R22 of the upper surface 225a of the electrode 225 adjacent the edge 2252, the width W5 of the region R21 not being equal to the width W6 of the region R22. In some embodiments, the area of region R21 is not equal to the area of region R22. In some embodiments, the insulating photosensitive material layer 300 contacts the region R23 of the upper surface 225a of the electrode 225 adjacent the edge 2253, and the width W5 of the region R21 is not equal to the width W7 of the region R23. In some embodiments, the area of region R21 is not equal to the area of region R23. In some embodiments, the insulating photosensitive material layer 300 contacts the region R24 of the upper surface 225a of the electrode 225 adjacent the edge 2254, and the width W5 of the region R21 is not equal to the width W8 of the region R24. In some embodiments, the area of region R21 is not equal to the area of region R24. In some embodiments, region R21, region R22, region R23, and region R24 of upper surface 225a of electrode 225 surround the effective light emitting area of upper surface 225a of electrode 225. In some embodiments, portion 225P of upper surface 225a of electrode 225 surrounds region R21, region R22, region R23, and region R24. In some embodiments, a portion of the insulating photosensitive material layer 300 surrounds the effective light emitting area of the upper surface 225a of the electrode 225. In some embodiments, a portion of the insulating photosensitive material layer 300 contacts the annular region (i.e., region R21, region R22, region R23, and region R24) between the effective light emitting region of the upper surface 225a of the electrode 225 and the portion 225P.

According to some embodiments of the disclosure, the plurality of coating layers coat the sidewalls of the plurality of organic light emitting units (e.g., the sidewalls of the plurality of electrodes) and are matched with the insulating photosensitive material layer, so that optical crosstalk between the organic light emitting units can be effectively reduced, halo problem of light emitting patterns can be reduced, and contrast of the light emitting patterns can be improved.

Furthermore, according to some embodiments of the present disclosure, each of the coating layers coats the sidewalls and the upper surface of the electrode (or anode) of each of the organic light emitting units, and the insulating photosensitive material layer is further disposed between the sidewalls of the electrodes of adjacent organic light emitting units, so that the light reflected upward or obliquely from the electrode can be effectively absorbed by the coating layer, and thus the optical crosstalk of the reflected light from the adjacent electrode can be better reduced, and the contrast of the light emitting patterns can be effectively improved. Besides, the insulating photosensitive material layer can help absorb light reflected upwards or obliquely from the electrodes, and when the material of the coating layer comprises a conductor, the insulating photosensitive material layer can also achieve an electrical isolation effect between different organic light-emitting units, so that short circuits caused by the fact that the conductive coating layer contacts with the electrodes of adjacent organic light-emitting units are avoided.

In addition, according to some embodiments of the present disclosure, each cladding layer is embedded (embedded) in the insulating photosensitive material layer, below the insulating photosensitive material layer, and/or between the surrounding area of each electrode and the insulating photosensitive material layer, so that the absorption effect of light reflected upwards or obliquely to the electrode can be enhanced, and thus optical crosstalk between the organic light emitting units can be reduced, the halation problem of the light emitting pattern can be reduced, and the contrast of the light emitting pattern can be improved.

Further, according to some embodiments of the present disclosure, the plurality of organic light emitting units may emit light with the same wavelength, for example, the adjacent plurality of organic light emitting units may emit light with the same wavelength, and the sidewalls of each organic light emitting unit are covered by the respective corresponding cladding layers, so that a light emitting pattern with a fine pattern design and a high contrast may be realized through the design of the number, the positional configuration relationship, and the outline of each effective light emitting region of the plurality of organic light emitting units.

Fig. 3A is a top view of a light emitting element according to some embodiments, and fig. 3B is a cross-sectional view illustrating along line 3B-3B' in fig. 3A. In some embodiments, fig. 3B is a cross-sectional view illustrating along line A-A in fig. 1 and illustrates only the light emitting region. In some embodiments, fig. 3B is a cross-sectional view illustrating along line 3B-3B' in fig. 3A and illustrates only the light emitting region. The cover layer 40 is omitted here for brevity.

In some embodiments, as shown in fig. 3A and 3B, a portion of the cladding layer 200A directly contacts a portion of the organic layer 269. In some embodiments, the upper surface 215a of the electrode 215 does not have regions R11 and R14. In some embodiments, a portion of the insulating photosensitive material layer 300 contacts the upper surface 215a of the electrode 215 and is located between the active light emitting region and the portion 215P. In some embodiments, a portion of the insulating photosensitive material layer 300 contacts an L-shaped region (i.e., region R11 and region R14) between the active light emitting region of the upper surface 215a of the electrode 215 and the portion 215P.

Fig. 4A is a top view of a light emitting element according to some embodiments, and fig. 4B is a cross-sectional view illustrating along line 4B-4B' in fig. 4A. In some embodiments, fig. 4B is a cross-sectional view illustrating along line A-A in fig. 1 and illustrates only the light emitting region. In some embodiments, fig. 4B is a cross-sectional view illustrating along line 4B-4B' in fig. 4A and illustrates only the light emitting region. The cover layer 40 is omitted here for brevity.

In some embodiments, the cladding layer is integrally formed with the insulating photosensitive material layer and is made of the same material. In some embodiments, as shown in fig. 4A and 4B, a cladding layer (e.g., cladding layer 200A) is integrally formed with an insulating photosensitive material layer (e.g., insulating photosensitive material layer 300) and is made of the same material as bump 310A, and a cladding layer (e.g., cladding layer 200B) is integrally formed with an insulating photosensitive material layer (e.g., insulating photosensitive material layer 300) and is made of the same material as bump 310B.

In some embodiments, the bump 310A surrounds the sidewall of the organic light emitting unit 101. In some embodiments, the bump 310A encapsulates a portion 215P of the upper surface 215a of the electrode 215 and the sidewall 215S of the electrode 215. In some embodiments, the bump 310A includes a through hole 310A1 (or referred to as a recess) for exposing a portion of the upper surface 215a of the electrode 215. In some embodiments, the bump 310A is interposed between the sidewall of the adjacent organic light emitting unit 101 and the sidewall of the organic light emitting unit 102.

In some embodiments, the bump 310B surrounds the sidewalls of the organic light emitting unit 102. In some embodiments, the bump 310B wraps around the portion 225P of the upper surface 225a of the electrode 225 and the sidewall 225S of the electrode 225. In some embodiments, the bump 310B includes a through hole 310B1 (or referred to as a recess) for exposing a portion of the upper surface 225a of the electrode 225. In some embodiments, the bump 310B is interposed between the sidewall of the adjacent organic light emitting unit 101 and the sidewall of the organic light emitting unit 102.

In some embodiments, the

bumps

310A, 310B comprise electrical conductors, and the bump 310A and the bump 310B are spaced apart from each other.

In some embodiments, the absorption of the

bumps

310A, 310B for a particular wavelength is greater than or equal to 80%. In some embodiments, the absorption of the

bumps

310A, 310B for a particular wavelength is greater than or equal to 90%. In some embodiments, the absorption of the

bumps

310A, 310B for a particular wavelength is greater than or equal to 95%. In some embodiments, the absorption of the

bumps

310A, 310B for a particular wavelength is greater than or equal to 99%. In some embodiments, the absorption of the

bumps

310A, 310B for a particular wavelength is greater than or equal to 99.5%. In some embodiments, the absorption of the

bumps

310A, 310B for a particular wavelength is greater than or equal to 99.9%. In some embodiments, the specific wavelength is no greater than 400nm. In some embodiments, the specific wavelength is no greater than 350nm. In some embodiments, the specific wavelength is no greater than 300nm. In some embodiments, the specific wavelength is no greater than 250nm. In some embodiments, the specific wavelength is no greater than 200nm. In some embodiments, the specific wavelength is no greater than 150nm. In some embodiments, the specific wavelength is no greater than 100nm.

In some embodiments, the center of the electrode 215 is not aligned with the center of the aperture 310A1 of the bump 310A. In some embodiments, the center of the electrode 225 is not aligned with the center of the aperture 310B1 of the bump 310B.

Fig. 4C is a top view of a light emitting element according to some embodiments, and fig. 4D is a cross-sectional view illustrating along line 4D-4D' in fig. 4C. In some embodiments, fig. 4D is a cross-sectional view illustrating along line A-A in fig. 1 and illustrates only the light emitting region. In some embodiments, fig. 4D is a cross-sectional view illustrating along line 4D-4D' in fig. 4C and illustrates only the light emitting region. The cover layer 40 is omitted here for brevity.

In some embodiments, the cladding layers (e.g., cladding layers 200A, 200B) are integrally formed with the insulating photosensitive material layer (e.g., insulating photosensitive material layer 300) and are made of the same non-conductive material to form the isolation structures 320, and the isolation structures 320 cover the non-light emitting regions of the light emitting elements. In some embodiments, a plurality of bumps (e.g., bump 310A and bump 310B) are connected to each other and made of the same non-conductive material to form isolation structures 320. In some embodiments, the isolation structures 320 cover non-light emitting areas over the substrate 100. In some embodiments, the isolation structure 320 completely covers the non-light emitting region of the light emitting element and exposes only the effective light emitting region of the organic light emitting unit.

Fig. 5A is a cross-sectional view of a light-emitting element according to some embodiments. In some embodiments, fig. 5A is a cross-sectional view illustrating along line A-A in fig. 1 and illustrates only the light emitting region. The cover layer 40 is omitted here for brevity.

In some embodiments, the insulating photosensitive material layer 300 has a curved surface 212 protruding from the substrate 100, and a portion of the organic layer 269 is located over the curved surface 212.

In some embodiments, the cladding layer 200A has a flat upper surface and sloped sidewalls. In some embodiments, the cladding layer 200B has a flat upper surface and sloped sidewalls.

In some embodiments, electrode 215 has an edge 2151 and an edge 2152 opposite edge 2151, portion 215P of upper surface 215a of electrode 215 extends inward from edge 2151 a distance D1, portion 215P of upper surface 215a of electrode 215 extends inward from edge 2152 a distance D2, and distance D1 is greater than distance D2.

In some embodiments, the insulating photosensitive material layer 300 contacts the region R11 of the upper surface 215a of the electrode 215 adjacent to the edge 2151, and the insulating photosensitive material layer 300 contacts the region R12 of the upper surface 215a of the electrode 215 adjacent to the edge 2152, the width W1 of the region R11 being less than the width W2 of the region R12.

Fig. 5B is a cross-sectional view of a light-emitting element according to some embodiments. In some embodiments, fig. 5B is a cross-sectional view illustrating along line A-A in fig. 1 and illustrates only the light emitting region. The cover layer 40 is omitted here for brevity.

In some embodiments, electrode 215 has an edge 2151 and an edge 2152 opposite edge 2151, portion 215P of upper surface 215a of electrode 215 extends inward from edge 2151 a distance D1, portion 215P of upper surface 215a of electrode 215 extends inward from edge 2152 a distance D2, and distance D1 is less than distance D2.

Fig. 6A is a top view of a light emitting element according to some embodiments, and fig. 6B is a cross-sectional view illustrating along line 6B-6B' in fig. 6A. In some embodiments, fig. 6B is a cross-sectional view illustrating along line A-A in fig. 1 and illustrates only the light emitting region. In some embodiments, fig. 6B is a cross-sectional view illustrating along line 6B-6B' in fig. 6A and illustrates only the light emitting region. The cover layer 40 is omitted here for brevity.

In some embodiments, the light emitting element further includes a transparent substrate 100, and the organic light emitting unit 101 and the organic light emitting unit 102 are disposed on the transparent substrate 100. In some embodiments, the light emitting elements shown in fig. 6A and 6B are back-lit light emitting elements. In some embodiments, the transparent substrate 100 may include a glass plate. In some embodiments, electrode 215 is a transparent electrode and electrode 216 is a reflective electrode.

In some embodiments, the electrode 215 has a cross-shaped profile from a top view. In some embodiments, the perforations 200A1 of the cladding layer 200A have a cross-shaped profile from a top view. In some embodiments, the recess 300C of the insulating photosensitive material layer 300 has a cross-shaped profile from a top view.

In some embodiments, the center of the electrode 215 is not aligned with the center of the recess 300C above the electrode 215. In some embodiments, the center of the electrode 215 is not aligned with the center of the perforation 200A1 of the cladding 200A.

Fig. 7A is a top view of a light emitting element according to some embodiments, and fig. 7B is a cross-sectional view illustrating along line 7B-7B' in fig. 7A. In some embodiments, fig. 7B is a cross-sectional view illustrating along line A-A in fig. 1 and illustrates only the light emitting region. In some embodiments, fig. 7B is a cross-sectional view illustrating along line 7B-7B' in fig. 7A and illustrates only the light emitting region. The cover layer 40 is omitted here for brevity.

In some embodiments, as shown in fig. 7A and 7B, the light emitting array includes a plurality of organic light emitting units, for example, at least organic

light emitting units

101, 102, 103, 104, and 105. In some embodiments, the organic

light emitting units

101, 102, 103, 104, and 105 are between the bumps 310 and above (or below) the substrate 100.

In some embodiments, organic light emitting unit 101 includes electrode 215, organic light emitting unit 102 includes electrode 225, organic light emitting unit 103 includes electrode 235, organic light emitting unit 104 includes electrode 245, and organic light emitting unit 105 includes electrode 255. In some embodiments, electrode 215, electrode 225, electrode 235, electrode 245, and electrode 255 are anodes. In some embodiments, the second electrode 216 is a common electrode (or common cathode) of all organic light emitting cells in the light emitting element.

In some embodiments, the cladding layer 200A surrounds the sidewalls of the organic light emitting unit 101. In some embodiments, the cladding layer 200B surrounds the sidewalls of the organic light emitting cells 102. In some embodiments, the cladding layer 200C surrounds the sidewalls of the organic light emitting cells 103. In some embodiments, the cladding layer 200D surrounds the sidewalls of the organic light emitting cells 104. In some embodiments, the cladding layer 200E surrounds the sidewalls of the organic light emitting cells 105.

In some embodiments, at least two of electrode 215, electrode 225, electrode 235, electrode 245, and electrode 255 have different exterior profiles. In some embodiments, electrode 215, electrode 225, electrode 235, electrode 245, and electrode 255 may comprise a particular light emitting pattern.

In some embodiments, at least two of the organic

light emitting units

101, 102, 103, 104, and 105 emit light of the same wavelength. In some embodiments, the organic

light emitting units

101, 102, 103, 104, and 105 are configured to emit the same group of the same color light.

Fig. 8A-13B illustrate a method of fabricating a light emitting device according to some embodiments.

As shown in fig. 8A and 8B, fig. 8A is a top view and fig. 8B is a cross-sectional view illustrating along a line 8B-8B' in fig. 8A.

In some embodiments, a plurality of

electrodes

215, 225, 235, 245, and 255 are formed on the substrate 100. In some embodiments,

electrodes

215, 225, 235, 245, and 255 form an electrode array pattern. In some embodiments, an array pattern of electrodes may be designed in consideration of the arrangement of the light emitting patterns.

As shown in fig. 9A and 9B, fig. 9A is a top view, and fig. 9B is a cross-sectional view illustrating along a line 9B-9B' in fig. 9A.

In some embodiments, the cladding material layer 200 is formed over the

electrodes

215, 225, 235, 245, and 255. In some embodiments, the coating material layer 200 is coated on the

electrodes

215, 225, 235, 245, and 255 and the substrate 100. In some embodiments, the cladding material layer 200 may be formed through a spin-on coating process or a deposition process.

In some embodiments, the cladding material layer 200 includes an electrical conductor. In some embodiments, the cladding material layer 200 comprises a metal, a resin, graphite, or any combination of the foregoing. In some embodiments, the cladding material layer 200 includes a photosensitive material. In some embodiments, the cladding material layer 200 includes quantum dots (dots). In some embodiments, the cladding material layer 200 includes a carbon black material, such as carbon black nanoparticles, carbon black-containing conductive fibers, or the like. In some embodiments, the cladding material layer 200 comprises a blackbody material having an absorptivity of 90%, 95%, 99%, 99.5%, or 99.9% or more for visible light.

As shown in fig. 10A and 10B, fig. 10A is a top view, and fig. 10B is a cross-sectional view illustrating along a line 10B-10B' in fig. 10A.

In some embodiments, the capping material layer 200 is patterned to form a plurality of capping

layers

200A, 200B, 200C, 200D, and 200E surrounding sidewalls 215S, 225S, 235S, 245S, and 255S of the

electrodes

215, 225, 235, 245, and 255 and exposing

upper surfaces

215a, 225a, 235a, 245a, and 255a of the

electrodes

215, 225, 235, 245, and 255. In some embodiments, the cladding layers 200A, 200B, 200C, 200D, and 200E are discontinuous with each other between the

electrodes

215, 225, 235, 245, and 255. In some embodiments, the cladding material layer 200 may be patterned through a photolithographic process.

In some embodiments, after exposure, the layer of overcoat material 200 is wetted in a solution for development. As shown in fig. 10B, a portion of the cladding material layer 200 is removed to form cladding layers 200A, 200B, 200C, 200D, and 200E. In some embodiments, after the cladding layers 200A, 200B, 200C, 200D, and 200E are formed, a cleaning operation may be performed to clean the exposed surfaces of the convex hull layers 200A, 200B, 200C, 200D, and 200E and the

electrodes

215, 225, 235, 245, and 255. In some embodiments, the cleaning operation may be performed at a temperature between 30 ℃ and 80 ℃. In some embodiments, water or isopropyl alcohol (IPA) or the like may be used as a cleaning agent, for example, and ultrasonic waves may be used to perform a cleaning operation.

As shown in fig. 11A and 11B, fig. 11A is a top view, and fig. 11B is a cross-sectional view illustrating along a line 11B-11B' in fig. 11A.

In some embodiments, an insulating photosensitive material 300A is disposed over the

electrodes

215, 225, 235, 245, and 255 and the cladding layers 200A, 200B, 200C, 200D, and 200E. In some embodiments, the insulating photosensitive material 300A may be formed through a spin-on process or a deposition process.

In some embodiments, the insulating photosensitive material 300A includes a photosensitive material. In some embodiments, the insulating photosensitive material 300A includes a blackbody material having an absorptivity of 90% or more for visible light. In some embodiments, the absorbance of the cladding layers 200A, 200B, 200C, 200D, and 200E for light having a particular wavelength is greater than the absorbance of the insulating photosensitive material 300A for the light having the particular wavelength. In some embodiments, the specific wavelength is no greater than 400nm, no greater than 350nm, no greater than 300nm, no greater than 250nm, no greater than 200nm, or no greater than 150nm.

As shown in fig. 12A and 12B, fig. 12A is a top view and fig. 12B is a cross-sectional view illustrating along a line 12B-12B' in fig. 12A.

In some embodiments, the insulating photosensitive material 300A is patterned to form an insulating photosensitive material layer 300 that exposes a plurality of effective light emitting areas of the

upper surfaces

215a, 225a, 235a, 245a, and 255a of the

electrodes

215, 225, 235, 245, and 255. In some embodiments, the insulating photosensitive material 300A may be patterned through a photolithographic process.

In some embodiments, after exposure, the insulating photosensitive material 300A is wetted in a solution for development. As shown in fig. 12B, a portion of the insulating photosensitive material 300A is removed to form an insulating photosensitive material layer 300. In some embodiments, after the insulating photosensitive material layer 300 is formed, a cleaning operation may be performed to clean exposed surfaces of the protruding insulating photosensitive material layer 300 and the

electrodes

Fig. 13A is a top view and fig. 13B is a cross-sectional view illustrating a line 13B-13B' in fig. 13A, as shown in fig. 13A and 13B.

In some embodiments, the organic light emitting material is disposed on the effective light emitting areas of the

upper surfaces

215a, 225a, 235a, 245a, and 255a of the

electrodes

215, 225, 235, 245, and 255. In some embodiments, the electrode 216 is disposed on the organic light emitting material.

In some embodiments, a carrier injection layer 261, a first carrier transport layer 262, a second carrier transport layer 263, an organic emission layer 264, and an organic carrier transport layer 265 are sequentially disposed on the insulating photosensitive material layer 300 and the exposed

upper surfaces

215a, 225a, 235a, 245a, and 255a of the

electrodes

215, 225, 235, 245, and 255. In some embodiments, each organic light emitting unit has a respective second carrier transport layer 263 and organic emissive layer 264.

The foregoing outlines features of some embodiments so that those skilled in the art may better understand the aspects of the present disclosure. Those skilled in the art should appreciate that they may readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments described herein. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they may make various changes, substitutions, and alterations herein without departing from the spirit and scope of the present disclosure.

Symbol description

10. Light-emitting element

20. Light-emitting layer

30. Spacer(s)

40. Cover layer

100. Substrate board

101. Organic light emitting unit

102. Organic light emitting unit

103. Organic light emitting unit

104. Organic light emitting unit

105. Organic light emitting unit

200. Coating material layer

200A coating

200A1 perforation

200B coating layer

200B1 perforation

200C coating layer

200D coating

200E coating layer

215. Electrode

2151. Edge of the sheet

2152. Edge of the sheet

2153. Edge of the sheet

2154. Edge of the sheet

215a upper surface

215P portion

215S side wall

216. Electrode

225. Electrode

2251. Edge of the sheet

2252. Edge of the sheet

2253. Edge of the sheet

2254. Edge of the sheet

225a upper surface

225P portion

225S sidewall

235. Electrode

235a upper surface

245. Electrode

245a upper surface

255. Electrode

255a upper surface

261. Carrier injection layer

262. First carrier transport layer

263. Second carrier transport layer

264. Organic emissive layer

265. Organic carrier transport layer

269. Organic layer

300. Insulating photosensitive material layer

300A insulating photosensitive material

300C concave part

310. Bump block

310A bump

310A1 perforation

310B bump

310B1 perforation

D1 Distance of

D2 Distance of

D3 Distance of

D4 Distance of

D5 Distance of

D6 Distance of

D7 Distance of

D8 Distance of

R11 region

R12 region

R13 region

R14 region

R21 region

R22 region

R23 region

R24 region

W1 width

W2 width

W3 width

W4 width

W5 width

W6 width

W7 width

W8 width

A-A line

2B-2B' line

3B-3B' line

4B-4B' line

6B-6B' line

7B-7B' line

8B-8B' line

9B-9B' line

10B-10B' line

11B-11B' line

12B-12B' line

13B-13B' line

Claims

1. A light emitting element characterized in that: it comprises the following steps:

a light emitting array comprising a first organic light emitting unit comprising a first electrode and a second organic light emitting unit comprising a second electrode;

a plurality of cladding layers, comprising:

a first coating layer that coats a portion of an upper surface of the first electrode and a sidewall of the first electrode; a kind of electronic device with high-pressure air-conditioning system

A second coating layer that coats a portion of an upper surface of the second electrode and a sidewall of the second electrode; and

an insulating photosensitive material layer located between the sidewall of the first electrode and the sidewall of the second electrode, wherein the insulating photosensitive material layer partially covers the upper surface of the first electrode.

2. A light-emitting element according to claim 1, wherein: the absorptivity of the plurality of coating layers to light is larger than that of the insulating photosensitive material layer to the light.

3. A light-emitting element according to claim 1, wherein: the cladding layers and the insulating photosensitive material layer are integrally formed and made of the same material.

4. A light-emitting element according to claim 1, wherein: the plurality of cladding layers are integrally formed with the insulating photosensitive material layer and made of the same non-conductive material to form an isolation structure covering a non-light emitting region of the light emitting element.

5. A light-emitting element according to claim 1, wherein: the plurality of cladding layers includes an electrical conductor, and the plurality of cladding layers are spaced apart from one another.

6. A light-emitting element according to claim 1, wherein: the plurality of cladding layers includes a photosensitive material.

7. A light-emitting element according to claim 1, wherein: the organic light emitting device further comprises a transparent substrate, wherein the first organic light emitting unit and the second organic light emitting unit are arranged on the transparent substrate.

8. A light-emitting element according to claim 1, wherein: the first electrode has a first edge and a second edge opposite or adjacent to the first edge, the portion of the upper surface extends inwardly from the first edge a first distance, the portion of the upper surface extends inwardly from the second edge a second distance, and the first distance is greater than the second distance.

9. A light-emitting element according to claim 1, wherein: the first electrode has a first edge and a second edge opposite or adjacent to the first edge, the insulating photosensitive material layer contacts a first region of the upper surface of the first electrode adjacent to the first edge and a second region adjacent to the second edge, the width of the first region is not equal to the width of the second region, and/or the area of the first region is not equal to the area of the second region.

10. A light-emitting element according to claim 1, wherein: the first electrode and the second electrode are anodes, and/or the first electrode and the second electrode comprise transparent conductive materials.

11. A light-emitting element according to claim 1, wherein: the first organic light emitting unit and the second organic light emitting unit emit light of the same wavelength.

12. A light emitting element characterized in that: it comprises the following steps:

a plurality of organic light emitting units;

an insulating photosensitive material layer covering the plurality of organic light emitting units, wherein the insulating photosensitive material layer has a plurality of recesses for exposing a plurality of effective light emitting areas of the plurality of organic light emitting units; and

a plurality of cladding layers, each of the cladding layers surrounding a sidewall of each of the organic light emitting units, and each of the cladding layers being interposed between the sidewalls of adjacent two of the plurality of organic light emitting units.

13. A light-emitting element according to claim 12, wherein: the absorptivity of the plurality of coating layers to light is larger than that of the insulating photosensitive material layer to the light.

14. A light-emitting element according to claim 12, wherein: the cladding layers and the insulating photosensitive material layer are integrally formed and made of the same material.

15. A light-emitting element according to claim 12, wherein: the plurality of cladding layers are integrally formed with the insulating photosensitive material layer and made of the same non-conductive material to form an isolation structure covering a non-light emitting region of the light emitting element.

16. A light-emitting element according to claim 12, wherein: the plurality of cladding layers includes an electrical conductor, and the plurality of cladding layers are spaced apart from one another.

17. A light-emitting element according to claim 12, wherein: the plurality of cladding layers includes a photosensitive material.

18. A light-emitting element according to claim 12, wherein: the organic light emitting device further comprises a transparent substrate, wherein the plurality of organic light emitting units are arranged on the transparent substrate.