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Quantum dot light-emitting diode and preparation method thereof

A quantum dot light-emitting and diode technology, which is used in the manufacture of semiconductor/solid-state devices, electrical components, and electrical solid-state devices, etc., can solve the problems of orbital hybridization, and it is difficult to continue to improve the HOMO energy level of organic hole transport materials.

Active Publication Date: 2020-07-07
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a quantum dot light-emitting diode and its preparation method, aiming to solve the problem of strong C 2p -M 3d Orbital hybridization, it is difficult to continue to improve the HOMO energy level of organic hole transport materials

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  • Quantum dot light-emitting diode and preparation method thereof

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preparation example Construction

[0038] Correspondingly, the second aspect of the embodiment of the present invention provides a method for manufacturing a quantum dot light-emitting diode, including the following steps:

[0039] An interfacial layer is prepared between the hole transport layer and the hole injection layer, wherein the hole injection layer is disposed adjacent to the anode, and the material of the hole injection layer contains a transition metal oxide; the hole transport The layer is arranged adjacent to the quantum dot light-emitting layer, and the material of the hole transport layer contains organic hole transport material; the material of the interface layer is a graphene material.

[0040] The preparation method of the quantum dot light-emitting diode provided by the embodiment of the present invention can be realized only by preparing an interface layer between the hole transport layer and the hole injection layer on the basis of the conventional quantum dot light-emitting diode preparat...

Embodiment 1

[0049] A method for preparing a quantum dot light-emitting diode, comprising the following steps:

[0050] Using transparent conductive film ITO as the anode, the thickness of the anode is 50nm;

[0051] Deposition of WO on the anode by solution processing 3 Nanoparticles, annealed at 100°C for 30 minutes to prepare a hole injection layer, the thickness of the hole injection layer is 30nm;

[0052] Depositing reduced graphene oxide on the hole injection layer by solution processing method, and annealing at 70°C for 30 minutes to prepare an interface layer, the thickness of the interface layer is 5nm;

[0053] Depositing PVK on the interface layer by a solution processing method, and annealing at 150°C for 30 minutes to prepare an organic hole transport layer, the thickness of the organic hole transport layer is 20nm;

[0054] Depositing CdSe / ZnS on the organic hole transport layer by a solution processing method, and annealing at 100°C for 30 minutes to prepare a quantum dot...

Embodiment 2

[0058] A method for preparing a quantum dot light-emitting diode, comprising the following steps:

[0059] Using transparent conductive film ITO as the anode, the thickness of the anode is 50nm;

[0060] Deposition of V on the anode by solution processing2 o 5 Nanoparticles, annealed at 100°C for 30 minutes to prepare a hole injection layer, the thickness of the hole injection layer is 30nm;

[0061] Depositing graphene oxide on the hole injection layer by a solution processing method, annealing at 180° C. for 60 minutes to prepare an interface layer, the thickness of the interface layer is 3 nm;

[0062] Depositing PVK on the interface layer by a solution processing method, and annealing at 150°C for 30 minutes to prepare an organic hole transport layer, the thickness of the organic hole transport layer is 20nm;

[0063] Depositing CdSe / ZnS on the organic hole transport layer by a solution processing method, and annealing at 100°C for 30 minutes to prepare a quantum dot lum...

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Abstract

The invention provides a quantum dot light-emitting diode. The quantum dot light-emitting diode comprises an anode and a cathode which are oppositely arranged, a quantum dot light-emitting layer arranged between the anode and the cathode, and a hole function lamination layer arranged between the anode and the quantum dot light-emitting layer, wherein the hole function lamination layer comprises ahole injection layer, a hole transport layer arranged on the hole injection layer and an interface layer arranged between the hole injection layer and the hole transport layer, the hole injection layer is arranged adjacent to the anode, and the material of the hole injection layer contains a transition metal oxide; the hole transport layer is arranged adjacent to the quantum dot light-emitting layer, and the material of the hole transport layer contains an organic hole transport material; and the interface layer is made of a graphene material.

Description

technical field [0001] The invention belongs to the field of photoelectric display technology, in particular to a quantum dot light-emitting diode and a preparation method thereof. Background technique [0002] Due to the unique optoelectronic properties of quantum dots, such as continuously adjustable emission wavelength with size and composition, narrow emission spectrum, high fluorescence efficiency, and good stability, quantum dot-based electroluminescent diodes (QLEDs) have attracted extensive attention in the display field. and research. In addition, QLED display also has many advantages that LCD cannot achieve, such as large viewing angle, high contrast ratio, fast response speed, and flexibility, so it is expected to become the next generation of display technology. [0003] After decades of development, the performance of QLED has been greatly improved and has entered the track of commercialization, but some bottlenecks have become increasingly prominent, restricti...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/56
CPCH10K71/12H10K50/115H10K50/156H10K71/40
Inventor 苏亮谢相伟
Owner TCL CORPORATION
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