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Photodiode and preparation method thereof, display substrate and display device

A technology of photodiodes and display substrates, applied in radiation control devices, circuits, electrical components, etc., can solve problems such as unfavorable full-screen display, complex light sensor structure, and affecting the display effect of the display screen

Active Publication Date: 2020-03-31
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventors found that there are at least the following problems in the prior art: due to the complex structure of the light sensor in the prior art, limited by its preparation process, it is often installed in the smart terminal by means of a plug-in, which requires a certain amount of space and is easy to affect Display the display effect of the screen, so it is not conducive to the realization of full screen display

Method used

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  • Photodiode and preparation method thereof, display substrate and display device
  • Photodiode and preparation method thereof, display substrate and display device
  • Photodiode and preparation method thereof, display substrate and display device

Examples

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Effect test

Embodiment 1

[0047] figure 1 A schematic flow diagram of a method for preparing a photodiode provided by an embodiment of the present invention, as figure 1 Shown, the preparation method of this photodiode comprises the steps:

[0048] S101, forming a semiconductor material layer on a substrate.

[0049] Such as figure 2 As shown, a layer of semiconductor material layer 20 can be formed on a substrate 201 by using a semiconductor material. The semiconductor material layer 20 includes: a first contact region 202, a second contact region 203, and a The semiconductor region 204 between the contact regions 203 . It can be understood that the semiconductor material may be a P-type semiconductor or an N-type semiconductor. In the embodiment of the invention, the semiconductor material is a P-type semiconductor as an example for illustration.

[0050] S102, processing the first contact region of the semiconductor material layer to form a first contact electrode.

[0051] Such as image 3 ...

Embodiment 2

[0072] Based on the same inventive concept, an embodiment of the present invention provides a photodiode, and the structure of the photodiode can be as follows Figure 8 As shown, the photodiode includes: a substrate 201, a first semiconductor layer 2041, a second semiconductor layer 2042, a first contact electrode 2021, a second contact electrode 2031, an interlayer insulating layer 205, a first via hole 206, a second via hole hole 207 , first connection electrode 208 and second connection electrode 209 .

[0073] The first semiconductor layer 2041 is located on the substrate 201; the first contact electrode 2021 is located at one end of the first semiconductor layer 2041; the second semiconductor layer 2042 is located on the first semiconductor layer 2041; the second contact electrode 2031 is located on the second semiconductor layer 2042 away from the first semiconductor layer One end of a contact electrode 2021; the interlayer insulating layer 205 is located on the first c...

Embodiment 3

[0076] An embodiment of the present invention provides a display substrate, and the display substrate includes the photodiode provided in the above embodiment. The display substrate has a display area and a non-display area. The photodiode is located in the non-display area of ​​the display substrate. While sensing ambient light, the photodiode can avoid blocking the display area of ​​the display substrate and affecting the display effect.

[0077] Optionally, the display substrate further includes: a pixel unit located in the display area of ​​the display substrate, and a first power supply terminal and a second power supply terminal connected to the pixel unit; the first power supply terminal is connected to the first connection electrode; the second power supply terminal Connect to the second connection electrode.

[0078] It should be noted that, the first power supply terminal and the second power supply terminal can provide driving current for the display device in the p...

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Abstract

The invention provides a photodiode, a preparation method, a display substrate and a display device, belongs to the technical field of display, and can solve the problems that an existing light sensoris complex in structure, is limited by a preparation process, is usually mounted in an intelligent terminal in an external hanging manner, and needs to occupy a certain space. The preparation methodof the photodiode comprises the following steps: forming a semiconductor material layer on a substrate; wherein the semiconductor material layer comprises a first contact region, a second contact region and a semiconductor region clamped between the first contact region and the second contact region; processing the first contact region of the semiconductor material layer to form a first contact electrode; processing the parts, far away from the substrate, of the semiconductor region and the second contact region of the semiconductor material layer to form a first semiconductor layer and a second semiconductor layer which are arranged in a laminated manner; and processing the part, corresponding to the second contact region, of the second semiconductor layer to form a second contact electrode.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a photodiode, a preparation method, a display substrate, and a display device. Background technique [0002] With the continuous development of technology, smart terminal devices have gradually entered people's lives. [0003] For smart terminal devices with display functions, if the display screen is in a state of high brightness for a long time, it will not only affect the increase in energy consumption, but also affect the display effect and reduce the user's visual experience. In order to realize the automatic adjustment of the display brightness of the display screen, in the prior art, the light sensor is often installed in the smart terminal in an external way. The light sensor is mainly composed of a light emitter and a light receiver. The signal is transmitted to the light receiver, which can convert the light signal into a corresponding electrical signal, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18H01L31/0224H01L31/101H01L27/144
CPCH01L31/18H01L31/022408H01L31/101H01L27/1446H01L27/1443H01L27/1259H10K59/13H01L27/14603H01L31/02005H01L31/14H01L31/16H10K59/60
Inventor 李梅
Owner BOE TECH GRP CO LTD
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