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A sandwich-like pn junction and its precise construction method

A sandwich and PN junction technology, applied in the field of PN junctions, can solve the problems of lack of strategy models and achieve the effect of improving photoelectrochemical performance and precise controllability

Active Publication Date: 2022-07-19
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite some progress, realizing sandwich-like PN homojunctions in single-atom-level 2D materials still faces great challenges due to the lack of feasible strategies and suitable models.

Method used

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  • A sandwich-like pn junction and its precise construction method
  • A sandwich-like pn junction and its precise construction method
  • A sandwich-like pn junction and its precise construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] SnO doped with fluorine 2 Conductive glass (conductive glass FTO) was continuously sonicated in acetone, ethanol and deionized water for 30 min each, dried and used for later use. Put tin sulfate and thiourea into a beaker with an atomic ratio of Sn:S=1:2, add 0.1 mmol ammonia water and an appropriate amount of deionized water, and fully stir to obtain a reaction solution. Then, put the dry conductive glass FTO into the polytetrafluoroethylene liner, and slowly drop the reaction droplets into the liner. The volume ratio of the conductive glass FTO to the reaction solution is 1:2, and the reaction solution does not completely submerge the conductive glass. Put the polytetrafluoroethylene liner into the autoclave, then put the autoclave into the oven, and react at 100°C for 40h. After the reaction was completed, the temperature was naturally cooled to room temperature. The reaction kettle was opened, a thin film was formed on the conductive glass FTO, the conductive gla...

Embodiment 2

[0067] SnO doped with fluorine 2 Conductive glass (conductive glass FTO) was continuously sonicated in acetone, ethanol and deionized water for 30 min each, dried and used for later use. Put tin chloride and thioacetamide into a beaker with an atomic ratio of Sn:S=1:2, add 10 mmol of ammonium sulfate and an appropriate amount of isopropanol, and fully stir to obtain a reaction solution. Then, put the dried conductive glass FTO into the polytetrafluoroethylene liner, and slowly drop the reaction drop into the liner. The volume ratio of the conductive glass FTO to the reaction solution is 1:10, and the reaction solution does not completely submerge the conductive glass. Put the polytetrafluoroethylene liner into the autoclave, then put the autoclave into the oven, and react at 200°C for 2 hours. After the reaction was completed, the temperature was naturally cooled to room temperature. Open the reactor, a thin film is formed on the conductive glass FTO, take out the conductive...

Embodiment 3

[0070] SnO doped with fluorine 2 Conductive glass (conductive glass FTO) was continuously sonicated in acetone, ethanol and deionized water for 30 min each, dried and used for later use. Put tin oxalate and sodium thiosulfate into a beaker with an atomic ratio Sn:S=1:2, add 5 mmol of tetramethylammonium and an appropriate amount of ethanol, and stir well to obtain a reaction solution. Then, put the dry conductive glass FTO into the polytetrafluoroethylene liner, and slowly drop the reaction drop into the liner. The volume ratio of the conductive glass FTO to the reaction solution is 1:6, and the reaction solution does not completely submerge the conductive glass. Put the polytetrafluoroethylene liner into the autoclave, then put the autoclave into the oven, and react at 150°C for 20h. After the reaction was completed, the temperature was naturally cooled to room temperature. Open the reaction kettle, a thin film is formed on the conductive glass FTO, take out the conductive ...

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Abstract

The invention belongs to the technical field of PN junction, and provides a sandwich-shaped PN junction. The sandwich-shaped PN junction is constructed in a three-layer unit cell thickness semiconductor material. The invention also provides a precise construction method of the sandwich-shaped PN junction. The sandwich-like PN junction of the present invention is uniform and tidy, has a sense of transparency, and the size is in the micrometer scale; the thickness of the sandwich-like PN junction of the present invention is completely consistent with the thickness of the three-layer unit cell semiconductor material; the construction method of the present invention has precise controllability, It is widely used in various semiconductor materials, and is of great significance for exerting the properties of the material itself and further improving the photoelectrochemical performance.

Description

technical field [0001] The invention relates to the technical field of PN junctions, in particular to a sandwich-shaped PN junction and a precise construction method thereof. Background technique [0002] Photoelectrochemical (PEC) water splitting, which uses sunlight to convert water into hydrogen and oxygen, is a promising approach for renewable energy conversion and storage. To achieve efficient photoelectric energy conversion, it is crucial to design and fabricate ideal semiconductor photoelectrodes to improve visible light collection rate and photoexcited carrier separation / transfer efficiency to accelerate oxygen evolution kinetics. Recently, two-dimensional (2D) graphene-like layered materials have been developed as promising PEC electrodes due to their unique optoelectronic properties. However, severe charge recombination and slow oxygen evolution reaction (OER) kinetics severely hinder the PEC performance of 2D layered semiconductor materials. [0003] Tuning the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0352H01L31/0336H01L31/068H01L31/072H01L31/18
CPCH01L31/068H01L31/03529H01L31/18H01L31/072H01L31/0336Y02E10/547
Inventor 王煜张慧娟吴俣
Owner CHONGQING UNIV
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