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CN-122029967-A - Light emitting element, array substrate, display device and method of manufacturing light emitting element

CN122029967ACN 122029967 ACN122029967 ACN 122029967ACN-122029967-A

Abstract

A light emitting element is provided. The light emitting element includes a first conductive layer, a barrier layer on the first conductive layer, and a plurality of posts spaced apart from one another by the barrier layer. Each of the plurality of pillars includes a first semiconductor material layer on the first conductive layer, a multiple quantum well layer on a side of the first semiconductor material layer remote from the first conductive layer, and a second semiconductor material layer on a side of the barrier layer and the multiple quantum well layer remote from the first semiconductor material layer. The light-emitting angle of the light-emitting element is within + -20 degrees.

Inventors

  • LAI YUN
  • WANG WEI
  • SUN QIAN
  • LI ZHONGXIAO

Assignees

  • 京东方科技集团股份有限公司

Dates

Publication Date
20260512
Application Date
20240912

Claims (20)

  1. 1. A light emitting element comprising: A first conductive layer; a barrier layer on the first conductive layer, and A plurality of pillars spaced apart from one another by the barrier layer; wherein each column of the plurality of columns comprises: A first layer of semiconductor material on the first conductive layer; a multiple quantum well layer located on a side of the first semiconductor material layer away from the first conductive layer, and A second semiconductor material layer located on a side of the barrier layer and the multiple quantum well layer remote from the first semiconductor material layer; wherein, the light-emitting angle of the light-emitting element is within + -20 degrees.
  2. 2. A light-emitting element according to claim 1, Wherein the light emitting element further comprises an insulating layer forming a tube configured to house the plurality of posts; Wherein an inner sidewall of the insulating layer is in contact with the second semiconductor material layer.
  3. 3. The light-emitting element according to claim 2, further comprising a second conductive layer located on a side of the insulating layer and the second semiconductor material layer remote from the first conductive layer.
  4. 4. The light-emitting element according to claim 3, wherein the first conductive layer, the second conductive layer, and the insulating layer encapsulate the plurality of posts.
  5. 5. The light-emitting element according to claim 1, further comprising: A back plate; A bonding layer on the back plate, and A first electrode layer located on a side of the bonding layer away from the back plate; Wherein the first electrode layer is connected to the first conductive layer, and The first electrode layer is bonded to the back plate through the bonding layer.
  6. 6. The light-emitting element according to claim 5, further comprising: a second electrode layer located on a side of the bonding layer away from the back plate, and An insulating layer located on a side of the first electrode layer and the second electrode layer away from the bonding layer; Wherein the bonding layer comprises a first bonding block and a second bonding block spaced apart from each other; the first electrode layer is bonded to the back plate through the first bonding block; The second electrode layer is bonded to the back plate through the second bonding block, and The second electrode layer is connected to the second semiconductor material layer through a via extending through the insulating layer.
  7. 7. The light-emitting element according to any one of claims 1 to 6, further comprising a lens; Wherein the orthographic projection of the lens onto the substrate base substantially covers the orthographic projection of the plurality of posts onto the substrate base.
  8. 8. The light-emitting element according to claim 7, wherein the lens is a biconvex lens.
  9. 9. The light emitting element of claim 7, wherein the lens has a first central optical axis; The light emitting element having a second central optical axis, and The first central optical axis and the second central optical axis do not overlap each other.
  10. 10. The light-emitting element according to claim 7, wherein the lens is a diffractive converging lens.
  11. 11. The light-emitting element according to any one of claims 1 to 6, further comprising: a first distributed Bragg reflector layer on a side of the first conductive layer remote from the first semiconductor material layer, and A second distributed bragg reflector layer located on a side of the second semiconductor material layer remote from the multiple quantum well layer; wherein the orthographic projection of the first distributed Bragg reflector layer on the substrate substantially covers the orthographic projection of the plurality of posts on the substrate, and The orthographic projection of the second distributed Bragg reflector layer on the substrate base plate substantially covers orthographic projections of the plurality of posts on the substrate base plate.
  12. 12. The light-emitting element according to any one of claims 1 to 6, further comprising reflective sidewalls configured to condense light emitted from the plurality of pillars in the light-emitting element; wherein an orthographic projection of the reflective sidewall onto a substrate substantially surrounds an orthographic projection of the plurality of posts in the light emitting element onto the substrate.
  13. 13. The light-emitting element according to claim 12, further comprising: A second conductive layer on a side of the second semiconductor material layer away from the first semiconductor material layer, the reflective sidewall on a side of the second conductive layer away from the substrate base plate, and A planarization layer located on a side of the second conductive layer remote from the substrate base plate; wherein the planarization layer fills the gap between the second conductive layer and the reflective sidewall.
  14. 14. The light-emitting element according to any one of claims 1 to 6, further comprising: A first lens, and A second lens; Wherein the orthographic projection of the first lens on the substrate base plate substantially covers the orthographic projection of the plurality of posts on the substrate base plate; Orthographic projection of the second lens on the substrate base plate substantially covers orthographic projection of the plurality of posts on the substrate base plate; The first lens is positioned on one side of the second semiconductor material layer away from the first conductive layer; the second lens is positioned on one side of the first lens away from the first conductive layer; The first lens is a biconvex lens, and The second lens is a diffractive refractive lens.
  15. 15. The light-emitting element according to any one of claims 1 to 6, wherein widths of the plurality of pillars in a first direction sequentially decrease, wherein the first direction is a direction along a plane that intersects the barrier layer, the first semiconductor material layer, the multiple quantum well layer, and the second semiconductor material layer and is perpendicular to a surface of the first conductive layer.
  16. 16. An array substrate, comprising: a stacked structure comprising a plurality of light emitting elements, wherein the plurality of light emitting elements comprises the light emitting element according to any one of claims 1 to 15; A plurality of first vias; A plurality of second vias, and A back plate; Wherein orthographic projections of the plurality of light emitting elements on the back plate at least partially overlap each other; One or more first electrode layers of the plurality of light emitting elements are electrically connected to the back plate through the plurality of first vias, and The second electrode layers of the plurality of light emitting elements are electrically connected to each other through the plurality of second vias.
  17. 17. An array substrate, comprising: a plurality of light emitting elements, wherein the plurality of light emitting elements comprises the light emitting element according to any one of claims 1 to 15; a color conversion layer configured to convert a color of light emitted from the at least one light emitting element into a different color; A transparent layer through which light emitted from at least one light emitting element passes without color conversion; Wherein orthographic projections of the plurality of light emitting elements on the substrate do not overlap each other, and The plurality of light emitting elements are configured to emit light of the same color.
  18. 18. A display device comprising the light-emitting element according to any one of claims 1 to 15, and one or more integrated circuits.
  19. 19. The display device according to claim 18, comprising a plurality of display panels configured to emit light of different colors, respectively, and an X-prism configured to combine light beams from the plurality of display panels; Wherein each of the plurality of display panels comprises the light emitting element according to any one of claims 1 to 15.
  20. 20. A method of manufacturing a light emitting element, comprising: forming a first conductive layer; forming a barrier layer on the first conductive layer; Forming a plurality of pillars spaced apart from one another by the barrier layer; Wherein forming each of the plurality of pillars comprises: forming a first semiconductor material layer on the first conductive layer; forming a multiple quantum well layer on a side of the first semiconductor material layer away from the first conductive layer, and Forming a second semiconductor material layer on a side of the barrier layer and the multiple quantum well layer away from the first semiconductor material layer; wherein, the light-emitting angle of the light-emitting element is within + -20 degrees.

Description

Light emitting element, array substrate, display device and method of manufacturing light emitting element Technical Field The present invention relates to display technology, and more particularly, to a light emitting element, an array substrate, a display device, and a method of manufacturing the light emitting element. Background In recent years, advances in Augmented Reality (AR) and Virtual Reality (VR) technology have driven the development of more complex and efficient display systems. AR/VR devices increasingly rely on high brightness, high efficiency light sources to create an immersive and visually attractive experience. These developments pave the way for more compact, lightweight, and energy efficient AR/VR systems that provide improved visual quality and user comfort, contributing to the widespread adoption and development of AR/VR applications. Disclosure of Invention In one aspect, the disclosure provides a light emitting element comprising a first conductive layer, a barrier layer on the first conductive layer, and a plurality of pillars spaced apart from each other by the barrier layer, wherein each of the plurality of pillars comprises a first semiconductor material layer on the first conductive layer, a multiple quantum well layer on a side of the first semiconductor material layer remote from the first conductive layer, and a second semiconductor material layer on a side of the barrier layer and the multiple quantum well layer remote from the first semiconductor material layer, wherein an angle of light emission of the light emitting element is within + -20 degrees. Optionally, the light emitting element further comprises an insulating layer forming a tube configured to receive the plurality of posts, wherein an inner sidewall of the insulating layer is in contact with the second layer of semiconductor material. Optionally, the light emitting element further comprises a second conductive layer located on a side of the insulating layer and the second semiconductor material layer remote from the first conductive layer. Optionally, the first conductive layer, the second conductive layer, and the insulating layer encapsulate the plurality of pillars. Optionally, the light emitting element further comprises a back plate, a bonding layer located on the back plate, and a first electrode layer located on a side of the bonding layer away from the back plate, wherein the first electrode layer is connected to the first conductive layer, and the first electrode layer is bonded to the back plate through the bonding layer. Optionally, the light emitting element further comprises a second electrode layer located on a side of the bonding layer away from the back plate, and an insulating layer located on a side of the first electrode layer and the second electrode layer away from the bonding layer, wherein the bonding layer comprises a first bonding block and a second bonding block spaced apart from each other, the first electrode layer is bonded to the back plate through the first bonding block, the second electrode layer is bonded to the back plate through the second bonding block, and the second electrode layer is connected to the second semiconductor material layer through a via extending through the insulating layer. Optionally, the light emitting element further comprises a lens, wherein an orthographic projection of the lens onto a substrate substantially covers an orthographic projection of the plurality of posts onto the substrate. Optionally, the lens is a biconvex lens. Optionally, the lens has a first central optical axis, the light emitting element has a second central optical axis, and the first central optical axis and the second central optical axis do not overlap each other. Optionally, the lens is a diffractive converging lens. Optionally, the light emitting element further comprises a first distributed Bragg reflector layer located on a side of the first conductive layer away from the first semiconductor material layer, and a second distributed Bragg reflector layer located on a side of the second semiconductor material layer away from the multiple quantum well layer, wherein an orthographic projection of the first distributed Bragg reflector layer on a substrate substantially covers an orthographic projection of the plurality of pillars on the substrate, and an orthographic projection of the second distributed Bragg reflector layer on the substrate substantially covers an orthographic projection of the plurality of pillars on the substrate. Optionally, the light emitting element further comprises reflective sidewalls configured to concentrate light emitted from the plurality of posts in the light emitting element, wherein an orthographic projection of the reflective sidewalls onto a substrate substantially surrounds an orthographic projection of the plurality of posts in the light emitting element onto the substrate. Optionally, the light emitting element further comprises a second co