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Light-emitting device, display substrate and display device

A technology for light-emitting devices and light-emitting layers, which is applied in the manufacture of electric solid-state devices, semiconductor devices, and semiconductor/solid-state devices, etc., can solve problems such as color crosstalk and lateral current drift, and achieve the purpose of preventing high voltage, reducing lateral current, and ensuring Effect of device voltage and performance

Active Publication Date: 2021-07-02
BOE TECH GRP CO LTD
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Problems solved by technology

[0003] In order to optimize the voltage and carrier injection, the devices in the current products use p-type doped materials. The functional layer of the doped material in the product (such as The hole transport layer) is common to the pixels of the three colors of RGB. When the power is turned on, there will be a lateral drift of the current, resulting in a low gray scale. Color crosstalk problem

Method used

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  • Light-emitting device, display substrate and display device
  • Light-emitting device, display substrate and display device
  • Light-emitting device, display substrate and display device

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Embodiment Construction

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0036] The light emitting device provided by the embodiment of the present application will be described in detail below.

[0037] Such as figure 2 As shown, the light-emitting device of the embodiment of the present invention includes a hole injection layer 11, a hole transport layer 12, an electron blocking layer 13, a light-emitting layer 14, and an electron injection layer 17 that are sequentially stacked, wherein the light-emitting layer 14 includes a plurality of li...

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Abstract

The invention discloses a light-emitting device, a display substrate and a display device. The light-emitting device comprises a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer and an electron injection layer which are sequentially arranged in a stacked mode, the light-emitting layer comprises a plurality of light-emitting units, and the wavelengths of light emitted by at least two light-emitting units are different; the hole mobility of the electron blocking layer is greater than or equal to the hole mobility of the hole injection layer and the hole transport layer; and the sheet resistance of the hole injection layer and the hole transport layer is greater than or equal to 5 * 10 <10> omega / sq. The electron blocking layer is arranged between the hole transport layer and the light-emitting layer to block electrons, the hole mobility of the electron blocking layer is larger than or equal to the hole mobility of the hole injection layer and the hole transport layer to prevent the problem of high voltage, the voltage and performance of the device are ensured, the transverse current of the hole injection layer and the hole transport layer is reduced, and the problem of color crosstalk between light-emitting units is solved.

Description

technical field [0001] The present application belongs to the field of display technology, and in particular relates to a light emitting device, a display substrate and a display device. Background technique [0002] In recent years, organic electroluminescence display (OLED), as a new type of flat panel display, has gradually received more attention. Due to its characteristics of active light emission, high luminous brightness, high resolution, wide viewing angle, fast response speed, low energy consumption, and flexibility, it has become a popular mainstream display product in the market. With the continuous development of products, customers have higher and higher resolutions for products, and lower and lower power consumption requirements. It is necessary to develop high-efficiency, low-voltage, and long-life devices. [0003] In order to optimize the voltage and carrier injection, the devices in the current product use p-type doped materials. The functional layer (such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L27/32
CPCH10K59/35H10K50/17H10K50/181H10K50/11H10K2101/40H10K50/13H10K50/15H10K50/16H10K50/18H10K50/171
Inventor 陈磊陈雪芹孙玉倩
Owner BOE TECH GRP CO LTD
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