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Self-driven photodetector and preparation method based on photovoltaic and hydrovolt effects

A photodetector and self-driven technology, which is applied in photovoltaic power generation, electric solid-state devices, semiconductor/solid-state device manufacturing, etc., can solve the problems of inability to detect light, poor stability, and high cost, and achieve low manufacturing process cost, stability and Increased service life and high material utilization

Active Publication Date: 2021-04-20
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the organohalide perovskite photodetector is based on the advantages of traditional perovskite photodetectors, MAPbI was prepared by spin coating method. 3 thin film, forming a structure of ITO / MAPbI 3 / ITO coplanar device, wide-spectrum photodetection can be realized by external power supply to the device, but the perovskite photodetector still has the disadvantage that the perovskite photodetector needs an external voltage when it works To drive, resulting in the application of light detection occasions that require a long time
The disadvantage of the structure of the device is that the photodetector is very sensitive to water molecules, and the perovskite material will react with water molecules in the air to decompose and fail, making it impossible to perform long-term photodetection in a humid environment. light detection
In the preparation method of this patent technology, thin copper wires are mainly used to connect perovskite solar cells and perovskite photodetectors, which leads to the disadvantage of using thin copper wires to connect perovskite solar cells and perovskite photodetectors. High cost and poor stability of perovskite photodetectors

Method used

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  • Self-driven photodetector and preparation method based on photovoltaic and hydrovolt effects
  • Self-driven photodetector and preparation method based on photovoltaic and hydrovolt effects

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preparation example Construction

[0035] refer to figure 2 , a method for preparing a self-driven photodetector based on photovoltaic and hydrovolt effects of the present invention, using inkjet printing technology to connect perovskite solar cells and perovskite photodetectors, the steps of the method include the following:

[0036] Step 1, pretreating the perovskite solar cell substrate.

[0037] Substrate 1 was put into detergent, acetone, isopropanol and deionized water in sequence for ultrasonic cleaning.

[0038] The ultrasonically cleaned substrate 1 is subjected to ultraviolet ozone UV-zone treatment to obtain a pretreated substrate 1 .

[0039]In step 2, the prepared electron transport layer solution is spin-coated on the pretreated substrate 1 to obtain the electron transport layer 2 .

[0040] The electron transport layer solution refers to titanium dioxide TiO 2 solution, zinc oxide ZnO solution, tin dioxide SnO 2 any of the solutions.

[0041] In step 3, the prepared electron transport layer...

Embodiment 1

[0062] Step 1: Pretreatment of the perovskite solar cell substrate.

[0063] Put the fluorine-doped tin oxide FTO substrate 1 into detergent, acetone, isopropanol and deionized water in sequence, heat and ultrasonically clean at 50°C for 20 minutes each,

[0064] The ultrasonically cleaned fluorine-doped tin oxide FTO substrate 1 was placed in a UV-zone for 30 minutes to obtain a pretreated fluorine-doped tin oxide FTO substrate 1 .

[0065] Step 2: Preparation of the electron transport layer of the perovskite solar cell.

[0066] Add 2.95g of zinc acetate powder into 125mL of methanol solution, immediately raise the temperature to 70°C, and keep stirring to obtain a transparent liquid A; dissolve 1.48g of potassium hydroxide powder in 65mL of methanol solution at 70°C, and keep stirring to obtain a mixed solution B; Add solution B dropwise to solution A while stirring, then stir for 2 hours, let it stand to cool to room temperature, remove the supernatant, wash the precipita...

Embodiment 2

[0088] Step 1: Pretreatment of the perovskite solar cell substrate.

[0089] Put the fluorine-doped tin oxide FTO substrate 1 into detergent, acetone, isopropanol and deionized water in sequence, heat and ultrasonically clean at 50°C for 20 minutes each,

[0090] The ultrasonically cleaned fluorine-doped tin oxide FTO substrate 1 was placed in a UV-zone for 30 min.

[0091] Step 2: preparing the electron transport layer of the perovskite solar cell.

[0092] Add 2.95g of zinc acetate powder into 125mL of methanol solution, immediately raise the temperature to 70°C, and keep stirring to obtain a transparent liquid A; dissolve 1.48g of potassium hydroxide powder in 65mL of methanol solution at 70°C, and keep stirring to obtain a mixed solution B; Add solution B dropwise to solution A while stirring, then stir for 2 hours, let it stand to cool to room temperature, remove the supernatant, wash the precipitate with methanol, add 70mL n-butanol, 5mL methanol and 5mL Chloroform was...

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Abstract

The invention discloses a photoelectric detector based on photovoltaic and hydrovolt effects and a preparation method thereof. A perovskite solar cell is used as the voltage drive of the perovskite photodetector, and the perovskite solar cell uses carbon as an electrode. The invention converts the energy of flowing water molecules into electric energy by using the hydrovolt effect, which not only reduces the influence of water molecules on devices, but also improves the performance and service life of the devices. The self-driven photodetector prepared by the invention based on photovoltaic and hydrovolt effects has good stability and long service life, and can perform long-term light detection in a humid environment.

Description

technical field [0001] The invention belongs to the field of photoelectric technology, and further relates to a self-driven photodetector and a preparation method based on photovoltaic and hydrovolt effects in the field of semiconductor photoelectric technology. The photodetector of the invention can be used to detect light signals in the ultraviolet-visible-near-infrared band. Background technique [0002] Photodetector is a photoelectric device that converts light radiation energy into a physical quantity that is easy to measure. It has a wide range of applications in various fields of military and national economy, such as biosensing, optical imaging, optical communication, environmental monitoring, national defense and military industry. Wait. The principle of the photodetector is mainly to use the external photoelectric effect or the internal photoelectric effect. The electrons in the detector directly absorb the energy of the photon, which changes the state of motion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/48
CPCH10K71/135H10K30/10Y02E10/549Y02P70/50
Inventor 常晶晶林珍华黄相平郝跃
Owner XIDIAN UNIV
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