Photoelectric detector and preparation method thereof

A photodetector and electrode technology, used in electrolytic capacitor manufacturing, capacitors, photovoltaic power generation, etc., can solve the problems of poor environmental stability of photodetectors, poor environmental stability of black phosphorus nanosheets, and high process conditions, and achieve photoelectric detection performance. It has the effects of breakthrough in stability and performance, good environmental stability, and simple and easy-to-operate preparation methods.

Inactive Publication Date: 2020-09-18
SHENZHEN HANGUANG TECH CO LTD
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  • Description
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Problems solved by technology

[0005] In order to solve the above problems, the invention provides a Bi 2 Te 3 Nanosheets, to solve the problem of poor environmental stability of the above-mentioned existing black phosphorus nanosheets, the present invention also provides a Bi 2 Te 3 Nanosheets, to solve the defects of complex preparation methods and high requirements for process conditions, the present invention also provides a method using the above Bi 2 Te 3 Nanosheet photodetector and preparation method thereof, used to overcome the problems of poor environmental stability and low detection performance of photodetectors

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  • Photoelectric detector and preparation method thereof
  • Photoelectric detector and preparation method thereof
  • Photoelectric detector and preparation method thereof

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preparation example Construction

[0055] The second aspect of the present invention provides a Bi 2 Te 3 The preparation method of nano sheet, comprises the following steps:

[0056] Bi(NO 3 ) 3 ·5H 2 O and Na 2 TeO 3 Dissolve in the solvent, continue to add PVP to the solvent, stir for 10-100min to form a homogeneous mixture, the Bi(NO 3 ) 3 ·5H 2 O, Na 2 TeO 3 The ratio of the amount of substance to PVP is 1000:1000~5000:0.5~5;

[0057] Transfer the mixed solution to an autoclave, adjust the temperature of the autoclave to 170-190°C and react for 2-12 hours, quench to room temperature, centrifuge and dry the reactant to obtain Bi 2 Te 3 Nanosheets.

[0058] As a preferred embodiment, the Bi(NO 3 ) 3 ·5H 2 O, Na 2 TeO 3 The ratio of the amount of substance to PVP is 1000:2000:1.5, and the stirring time is 30min.

[0059] As a preferred embodiment, the autoclave is a polytetrafluoroethylene-lined autoclave, and the temperature of the autoclave is adjusted to 180°C.

[0060] As a preferred e...

Embodiment 1

[0105] A Bi 2 Te 3 The preparation method of nano sheet, comprises the following steps:

[0106] 20mmol of Bi(NO 3 ) 3 ·5H 2 O and 40 mmol Na 2 TeO 3 First dissolved in 30 mL of deionized water, then 0.03 mmol of PVP was added to the solution and kept stirring for 30 min to form a homogeneous mixture. Transfer the mixture to a 50 mL Teflon-lined autoclave and place in an oven at 180 °C. The reaction time is 2 hours, and the reactant is quenched to room temperature through the system to stop. Finally, the obtained reactant was centrifuged and vacuum-dried to obtain Bi 2 Te 3 nanosheets (called NP-1 samples). Such as figure 1 Shown in a, is the scanning electron microscope (SEM) image of NP-1 sample, figure 1 a and figure 1 g shows that the lateral dimensions of NP-1 nanosheets range from 470 to 770 nm. Such as figure 1 Shown in c is the transmission electron microscope (TEM) characterization pattern of the NP-1 sample, showing that the prepared Bi 2 Te 3 The na...

Embodiment 2

[0108] A Bi 2 Te 3 The preparation method of nano sheet, comprises the following steps:

[0109] 20mmol of Bi(NO 3 ) 3 ·5H 2 O and 40 mmol Na 2 TeO 3 First dissolved in 30 mL of deionized water, then 0.03 mmol of PVP was added to the solution and kept stirring for 30 min to form a homogeneous mixture. Transfer the mixture to a 50 mL Teflon-lined autoclave and place in an oven at 180 °C. The reaction time is 12 hours, and the reactant is quenched to room temperature through the system to stop. Finally, the obtained reactant was centrifuged and vacuum-dried to obtain Bi 2 Te 3 nanosheets (called NP-2 samples). Such as figure 1 Shown in b, is the scanning electron microscope (SEM) image of NP-2 sample, figure 1 b shows that the lateral dimensions of NP-2 nanosheets range from 520 to 940 nm. Such as figure 1 Shown in d is the transmission electron microscope (TEM) characterization pattern of the NP-2 sample, showing that the prepared Bi 2 Te 3 The nanosheets are he...

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Abstract

The invention provides a photoelectric detector. The photoelectric detector comprises a working electrode, a reference electrode and an electrolyte. The working electrode and the reference electrode are both arranged in the electrolyte. The working electrode comprises a substrate and a Bi2Te3 nanosheet arranged on the surface of the substrate, and the transverse size of the Bi2Te3 nanosheet is 470-940 nm. The photoelectric detector is made of Bi2Te3 nanosheets. When the photoelectric detector performs detection, the photoelectric detector generates a current response signal under illumination,and light detection can be realized according to the current response signal. The photoelectric detector provided by the invention not only has good environmental stability, but also has excellent photoelectric detection performance. The invention also provides a preparation method of the photoelectric detector.

Description

technical field [0001] The invention relates to the field of optoelectronics, in particular to a 2 Te 3 A nanosheet photodetector and a method for preparing the photodetector. Background technique [0002] A photodetector is a device that can convert light signals into electrical signals, and it has a wide range of applications in many fields. When the thickness is reduced to the atomic level, two-dimensional atomic crystals show the advantages of strong interaction between light and matter, excellent mechanical flexibility and easy multi-functional integration, making them the most promising class of materials in the field of photodetection devices in the future. . [0003] In 2014, a new atomic-scale two-dimensional atomic crystal - black phosphorus - was experimentally obtained for the first time by Chinese scientists and quickly attracted extensive attention from researchers. Two-dimensional black phosphorus also has the characteristics of high carrier mobility, larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/00B82Y40/00B82Y15/00
CPCB82Y15/00B82Y40/00H01G9/0029H01G9/2022Y02E10/542
Inventor 黄卫春张也游琪
Owner SHENZHEN HANGUANG TECH CO LTD
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