Light-emitting substrate and method for manufacturing the same, solution containing light-emitting material and light-emitting apparatus

Patent metadata

Field	Value
Publication number	US-12557539-B2
Application number	US-202218249556-A
Country	US
Kind code	B2
Filing date	Apr 29, 2022
Priority date	Apr 29, 2022
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

A light-emitting substrate includes a substrate and a first light-emitting device. The first light-emitting device includes a first electrode, a first functional layer, a first light-emitting pattern and a second electrode that are sequentially disposed in a direction away from the substrate. The first functional layer is in contact with the first light-emitting pattern. The first light-emitting pattern includes a first light-emitting material. The first light-emitting material includes first light-emitting particles and first ligands combined with the first light-emitting particles. The first functional layer includes a first functional material. The first functional material includes first functional particles and second ligands combined with the first functional particles. A development characteristic of the first ligands is same as a development characteristic of the second ligands.

First claim

What is claimed is:

1 . A light-emitting substrate, comprising:
a substrate, and a first light-emitting device, wherein the first light-emitting device includes a first electrode, a first functional layer, a first light-emitting pattern and a second electrode that are sequentially disposed in a direction away from the substrate, and the first functional layer is in contact with the first light-emitting pattern, wherein the first light-emitting pattern includes a first light-emitting material, and the first light-emitting material includes first light-emitting particles and first ligands combined with the first light-emitting particles; the first functional layer includes a first functional material, and the first functional material includes first functional particles and second ligands combined with the first functional particles; and a development characteristic of the first ligands is same as a development characteristic of the second ligands; and the first functional layer further includes third ligands; the third ligands are combined with the first functional particles; and a chain length of the third ligands is less than a chain length of the first ligands; or the chain length of the third ligands is less than a chain length of first photosensitive ligands, and the first ligands are products of the first photosensitive ligands under light irradiation.

2 . The light-emitting substrate according to claim 1 , wherein a particle diameter of the first functional particles is less than a particle diameter of the first light-emitting particles.

3 . The light-emitting substrate according to claim 1 , wherein
for the first functional particles, a ratio of a number of the second ligands to a sum of the number of the second ligands and a number of the third ligands is in a range of 1/2 to 2/3, inclusive.

4 . The light-emitting substrate according to claim 1 , wherein a ratio of a thickness of the first functional layer to a thickness of the first light-emitting pattern is in a range of 1/3 to 1/5, inclusive; and/or
a ratio of a number of the first light-emitting particles of the first light-emitting pattern to a number of the first functional particles of the first functional layer is in a range of 66/100 to 80/100, inclusive.

5 . The light-emitting substrate according to claim 1 , wherein both the first ligands and the second ligands are photosensitive ligands;
or both the first ligands and the second ligands are products of respective photosensitive ligands under light irradiation.

6 . The light-emitting substrate according to claim 1 , further comprising an auxiliary functional layer, wherein the auxiliary functional layer is located between the first electrode and the first functional layer.

7 . The light-emitting substrate according to claim 1 , further comprising a second light-emitting device, wherein
the second light-emitting device includes a third electrode, a second functional layer, a second light-emitting pattern and a fourth electrode that are sequentially disposed in the direction away from the substrate, and the second functional layer is in contact with the second light-emitting pattern, wherein the second light-emitting pattern includes a second light-emitting material, and the second light-emitting material includes second light-emitting particles and fourth ligands combined with the second light-emitting particles; the second functional layer includes a second functional material, and the second functional material includes second functional particles and fifth ligands combined with the second functional particles; and a development characteristic of the fourth ligands is same as a development characteristic of the fifth ligands.

8 . The light-emitting substrate according to claim 7 , wherein the second functional layer further includes sixth ligands, the sixth ligands are combined with the second functional particles, and a chain length of the sixth ligands is less than a chain length of the fourth ligands; and/or
the first light-emitting device further includes a first material layer, the first material layer is located on a surface of the first light-emitting pattern away from the substrate, and a material of the first material layer is same as the second functional material.

9 . The light-emitting substrate according to claim 1 , further comprising a third light-emitting device, wherein
the third light-emitting device includes a fifth electrode, a third functional layer, a third light-emitting pattern and a sixth electrode that are sequentially disposed in the direction away from the substrate, and the third functional layer is in contact with the third light-emitting pattern, wherein the third light-emitting pattern includes a third light-emitting material, and the third light-emitting material includes third light-emitting particles and seventh ligands combined with the third light-emitting particles; the third functional layer includes a third functional material, and the third functional material includes third functional particles and eighth ligands combined with the third functional particles; and a development characteristic of the seventh ligands is same as a development characteristic of the eighth ligands.

10 . The light-emitting substrate according to claim 9 , wherein the third functional layer further includes ninth ligands, the ninth ligands are combined with the third functional particles, and a chain length of the ninth ligands is less than a chain length of the seventh ligands.

11 . The light-emitting substrate according to claim 9 , further comprising a second light-emitting device, wherein the second light-emitting device includes a third electrode, a second functional layer, a second light-emitting pattern and a fourth electrode that are sequentially disposed in the direction away from the substrate; the second functional layer is in contact with the second light-emitting pattern; the second light-emitting pattern includes a second light-emitting material; the second light-emitting material includes second light-emitting particles and fourth ligands combined with the second light-emitting particles; the second functional layer includes a second functional material; the second functional material includes second functional particles and fifth ligands combined with the second functional particles; and a development characteristic of the fourth ligands is same as a development characteristic of the fifth ligands;
the second light-emitting device further includes a second material layer, the second material layer is located on a surface of a second light-emitting pattern away from the substrate, and a material of the second material layer is same as a material of the third functional layer; and/or a particle diameter of the first light-emitting particles and a particle diameter of the second light-emitting particles in the second light-emitting device are both greater than a particle diameter of the third light-emitting particles; and the first functional particles and the second functional particles of the second light-emitting device are P-type semiconductors, and the third functional particles are N-type semiconductors.

12 . A solution containing a light-emitting material, comprising a first solvent and a first initial light-emitting material and a first initial functional material that are dissolved in the first solvent, wherein
the first initial light-emitting material includes first light-emitting particles and first photosensitive ligands combined with the first light-emitting particles; and the first initial functional material includes first functional particles and second photosensitive ligands combin

Assignees

• Boe Technology Group Co Ltd

Inventors

• Yuan Xu
• Zhang Xiaoyuan
• Chen Zhuo
• Li Zhuo
• Zhang Di

Classifications

• H10K71/12

  using liquid deposition, e.g. spin coating · CPC title

• H10K71/20

  Changing the shape of the active layer in the devices, e.g. patterning · CPC title

• H10K71/60

  Forming conductive regions or layers, e.g. electrodes · CPC title

• H10K50/115 Primary

  comprising active inorganic nanostructures, e.g. luminescent quantum dots · CPC title

• H10K59/95 Primary

  wherein all light-emitting elements are organic, e.g. assembled OLED displays · CPC title