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Alcohol-substituted two-dimensional layered germane and preparation method

A two-dimensional layered, germane technology, applied in the direction of germanium organic compounds, etc., can solve the problem of low band gap value

Active Publication Date: 2018-12-21
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2016, Joshua E.Goldberger et al. functionalized germane with groups such as methyl, ethyl, propyl, butyl ether, and propylene, so that the band gap of germane was adjustable from 1.45 to 1.66 eV, but the band gap value still relatively low

Method used

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  • Alcohol-substituted two-dimensional layered germane and preparation method
  • Alcohol-substituted two-dimensional layered germane and preparation method
  • Alcohol-substituted two-dimensional layered germane and preparation method

Examples

Experimental program
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Effect test

example 1

[0022] Weigh 200mg (0.001mol) CaGe 2 , dispersed in 20ml of acetonitrile, under nitrogen protection, add 108ul (0.006mol) ultrapure water, add 1.7ml (0.02mol) iodine ethanol under dark conditions, stir and react at 200r / min in a constant temperature water bath at room temperature for 5 sky. The product was washed with 40ml of deionized water, then suction-filtered, and washed repeatedly three times (a total of 120ml of deionized water was used). Then washed three times with isopropanol in the same manner (the amount of isopropanol is 120ml), and vacuum dried at room temperature for 8h to obtain ethanol-substituted two-dimensional layered germane. UV-Visible-NIR DRS) test shows that its band gap is around 1.81eV.

example 2

[0024] Weigh 200mg (0.001mol) CaGe 2 , dispersed in 30ml of acetonitrile, protected by argon, added 162ul (0.009mol) of ultrapure water, added 2.6ml (0.03mol) of iodoethanol under dark conditions, and stirred and reacted in a constant temperature water bath at a speed of 400r / min at room temperature 7 days. The product was washed with 80 ml of deionized water, then suction-filtered, and washed repeatedly three times (a total of 240 ml of deionized water was used). Then wash with isopropanol three times in the same manner (240 ml of isopropanol), and vacuum-dry at room temperature for 14 h to obtain ethanol-substituted two-dimensional layered germane. UV-Visible-NIR DRS) test shows that its band gap is around 1.81eV.

example 3

[0026] Weigh 300mg (0.0016mol) CaGe 2 , dispersed in 60ml of acetonitrile, nitrogen protection, add 346ul (0.0192mol) ultrapure water, add 6.1ml (0.064mol) iodopropanol under dark conditions, stir the reaction in a constant temperature water bath at 600r / min at room temperature 9 days. The product was washed with 150 ml of deionized water, then suction filtered, and washed three times (450 ml of deionized water in total). Then, it was washed three times with isopropanol in the same manner (the amount of isopropanol was 450 ml), and vacuum-dried at room temperature for 20 h to obtain a two-dimensional layered germane substituted with propanol. UV-Visible-NIR DRS) test shows that its band gap is around 1.89eV.

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Abstract

The invention relates to a preparation method for an alcohol-substituted two-dimensional layered germane. Under the shielding of nitrogen or inert gas, CaGe<2> is dispersed into acetonitrile, ultrapure water and iodoethanol or iodopropanol are added for reaction under a dark condition, and stirring is carried out under room temperature for 5 to 10 days; the product is washed respectively by usingdeionized water and isopropanol and dried under room temperature and vacuum for 8 to 24 hours, and thereby the ethyl alcohol- or propyl alcohol-substituted two-dimensional layered germane is obtained.According to the alcohol-substituted two-dimensional layered germane prepared by the invention, the two-dimensional layered germane is a direct-band gap semiconductor, and the optical band gap rangeis between 1.8 eV and 1.9 eV. Compared with pure germane (band gap value: 1.56 eV), the alcohol-substituted two-dimensional layered germane is greatly improved, and is expected to effectively turn offa device in terms of application in field effect transistors.

Description

technical field [0001] The invention relates to the preparation of two-dimensional layered germane substituted by organic functional groups, belongs to the technical field of synthesis technology and two-dimensional germanium-based semiconductor material preparation, and specifically relates to a type of alcohol-substituted two-dimensional layered germane and its preparation method. Background technique [0002] Two-dimensional materials represented by graphene have great application potential in semiconductor devices, photocatalysis, energy storage and other fields due to their many novel physical and chemical properties. The electron mobility of graphene is tens of times or even hundreds of times higher than that of silicon materials. If it is applied to transistors, it will help to further increase the CPU operation rate. However, because graphene has a zero band gap, transistors made of graphene cannot be turned off, which limits its application in this field to a certai...

Claims

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Application Information

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IPC IPC(8): C07F7/30
CPCC07F7/30
Inventor 封伟赵付来王宇冯奕钰李瑀
Owner TIANJIN UNIV
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