QLED device, display device and preparation method of display device

A device and interface modification technology, which is applied in semiconductor/solid-state device manufacturing, electric solid-state devices, semiconductor devices, etc., can solve the problems of short service life, unbalanced carrier injection, low power efficiency, etc., and achieve less transmission loss, The effect of improving the overall efficiency and reducing the driving voltage
CN108735907AInactive Publication Date: 2018-11-02TCL CORPORATION
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TCL CORPORATION
Publication Date
2018-11-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of display application and provides a QLED device, a display device and a preparation method of the display device. The QLED device comprises a substrate,a bottom electrode, a hole transport layer, a quantum dot light-emitting layer, an electron transport layer, a top electrode and a hole injection layer, wherein the substrate, the bottom electrode, the hole transport layer, the quantum dot light-emitting layer, the electron transport layer and the top electrode are sequentially arranged; the hole injection layer is prepared through doping a hole injection material and an interface-modified material; and the interface-modified material is a p-type conductive material. According to the QLED device, the hole injection layer is prepared through doping the hole injection material and the interface-modified material, so that the hole transport capacity and the ionization energy are improved and the hole injection barrier is reduced, thereby effectively improving the electric conductivity, reducing driving voltage, improving injection balance of charge carriers, simultaneously reducing charges of the device, improving the power efficiency ofthe device and prolonging the service life of the device.
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Description

technical field

[0001] The invention belongs to the field of display application technology, and in particular relates to a QLED device, a display device and a preparation method thereof. Background technique

[0002] Quantum Dot Light Emitting Diode (QLED) has the advantages of high color purity, thinness and flexibility, and can be prepared by solution method. It is a next-generation display technology with high expectations.

[0003] At present, QLED devices generally use quantum dots as light-emitting materials. At the same time, in order to improve the charge mobility of QLED devices, PEDOT (polymer of 3,4-ethylenedioxythiophene monomer): PSS (sodium polystyrene sulfonate) is usually used. as a hole-injecting material. However, due to the high ionization energy of the quantum dot material and the low work function of the ITO anode modified by PEDOT:PSS, effective hole injection cannot be formed, and the hole mobility of the quantum dot itself is lower than the electron...

Claims

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