US 12,274,113 B2Granted

Hole transport material, quantum dot light-emitting device and manufacturing method thereof, and display apparatus

AssigneeBoe Technology Group Co., Ltd.

InventorHaowei Wang

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Abstract

The present disclosure provides a hole transport material, a quantum dot light-emitting device and a manufacturing method thereof and a display apparatus. A surface of a quantum dot is modified with a ligand capable of being cross-linked with a modifying group of the hole transport material, that is, a cross-linking group in the ligand, so that when the quantum dot light-emitting device is manufactured, the cross-linking group of the quantum dot material is cross-linked with the modifying group of the hole transport material under a set external stimulus, so that the coupling degree between a light-emitting layer and a hole transport layer is increased and an interface structure between the light-emitting layer and the hole transport layer is weakened, thus facilitating carrier transmission. Under the condition of not sacrificing the transmission rate of electrons, hole injection is increased to the greatest extent, so as to regulate the injection balance of carriers, improve the carrier recombination rate of the quantum dot light-emitting device, and further improve the luminous efficiency and other device performances of the quantum dot light-emitting device. Moreover, the increase of hole injection will reduce the aggregation of carriers at an interface, thereby improving the stability of the device.

Claims7

Dependent claims

A quantum dot light-emitting device, comprising an anode, a hole transport layer, a light-emitting layer, an electron transport layer and a cathode disposed in a stacked mode, wherein

the hole transport layer comprises a hole transport material comprising a body of the hole transport material and a modifying group connected with the body of the hole transport material, wherein the modifying group is configured to be cross-linked with a cross-linking group of a quantum dot material under a set external stimulus, wherein
the light-emitting layer comprises a quantum dot material comprising a quantum dot and a ligand connected with the quantum dot;
and
the ligand comprises a coordinating group bonded with the quantum dot, a solubilizing group connected with the coordinating group, and a cross-linking group connected with the solubilizing group, wherein the cross-linking group is cross-linked with the modifying group of the hole transport material;
wherein the quantum dot material and the hole transport material are arranged in different layers;
wherein a molecular formula of the ligand of the quantum dot material is as follows:
a molecular formula of the hole transport material is as follows:
and a molecular formula after the ligand of the quantum dot material is cross-linked with the hole transport material is as follows:
or,
a molecular formula of the ligand of the quantum dot material is as follows:
a molecular formula of the hole transport material is as follows:
and a molecular formula after the ligand of the quantum dot material is cross-linked with the hole transport material is as follows:
or,
a molecular formula of the ligand of the quantum dot material is as follows:
a molecular formula of the hole transport material is as follows:
and a molecular formula after the ligand of the quantum dot material is cross-linked with the hole transport material is as follows:
or,
a molecular formula of the ligand of the quantum dot material is as follows:
a molecular formula of the hole transport material is as follows:
and a molecular formula after the ligand of the quantum dot material is cross-linked with the hole transport material is as follows:
or,
a molecular formula of the ligand of the quantum dot material is as follows:
a molecular formula of the hole transport material is as follows:
and a molecular formula after the ligand of the quantum dot material is cross-linked with the hole transport material is as follows:
or,
a molecular formula of the ligand of the quantum dot material is as follows:
a molecular formula of the hole transport material is as follows:
and a molecular formula after the ligand of the quantum dot material is cross-linked with the hole transport material is as follows:

25 more elements

A display apparatus, comprising a quantum dot light-emitting device, wherein the quantum dot light-emitting device comprises an anode, a hole transport layer, a light-emitting layer, an electron transport layer and a cathode disposed in a stacked mode, wherein

the hole transport layer comprises a hole transport material comprising a body of the hole transport material and a modifying group connected with the body of the hole transport material, wherein the modifying group is configured to be cross-linked with a cross-linking group of a quantum dot material under a set external stimulus, wherein
the light-emitting layer comprises a quantum dot material comprising a quantum dot and a ligand connected with the quantum dot;
and
the ligand comprises a coordinating group bonded with the quantum dot, a solubilizing group connected with the coordinating group, and a cross-linking group connected with the solubilizing group, wherein the cross-linking group is cross-linked with the modifying group of the hole transport material;
wherein the quantum dot material and the hole transport material are arranged in different layers;
wherein a molecular formula of the ligand of the quantum dot material is as follows:
a molecular formula of the hole transport material is as follows:
and a molecular formula after the ligand of the quantum dot material is cross-linked with the hole transport material is as follows:
or,
a molecular formula of the ligand of the quantum dot material is as follows:
a molecular formula of the hole transport material is as follows:
and a molecular formula after the ligand of the quantum dot material is cross-linked with the hole transport material is as follows:
or,
a molecular formula of the ligand of the quantum dot material is as follows:
a molecular formula of the hole transport material is as follows:
and a molecular formula after the ligand of the quantum dot material is cross-linked with the hole transport material is as follows:
or,
a molecular formula of the ligand of the quantum dot material is as follows:
a molecular formula of the hole transport material is as follows:
and a molecular formula after the ligand of the quantum dot material is cross-linked with the hole transport material is as follows:
or,
a molecular formula of the ligand of the quantum dot material is as follows:
a molecular formula of the hole transport material is as follows:
and a molecular formula after the ligand of the quantum dot material is cross-linked with the hole transport material is as follows:
or
a molecular formula of the ligand of the quantum dot material is as follows:
a molecular formula of the hole transport material is as follows:
and a molecular formula after the ligand of the quantum dot material is cross-linked with the hole transport material is as follows:

25 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/427,012Filed 28 Oct 2020
Published: US 2022/0320453 A16 Oct 2022
Granted: 8 Apr 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification21 codes

C07D 303/32
With hydrocarbon radicals, substituted by singly or doubly bound oxygen atoms: by aldehydo- or ketonic radicals
C07C 57/18
Unsaturated compounds having carboxyl groups bound to acyclic carbon atoms: with only carbon-to-carbon triple bonds as unsaturation
C07C 211/09
Of an acyclic saturated carbon skeleton: diamines
C07C 211/54
Having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton: having amino groups bound to two or three…