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Application of solid acid as carbon nanotube dopant and doping method

A carbon nanotube thin film and dopant technology, applied in chemical instruments and methods, conductive layers on insulating carriers, carbon compounds, etc. Optical performance and other issues, to achieve the effect of low preparation cost, good transparent conductivity, and reduce square resistance

Pending Publication Date: 2022-08-02
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after doping, gold trichloride will form gold particles on the film, and the gold particles will absorb and scatter visible light, reducing the light transmission performance of the film
In addition, the thermal stability of gold trichloride is poor, and the doping effect gradually disappears after heating

Method used

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  • Application of solid acid as carbon nanotube dopant and doping method
  • Application of solid acid as carbon nanotube dopant and doping method
  • Application of solid acid as carbon nanotube dopant and doping method

Examples

Experimental program
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Embodiment approach

[0031] According to a preferred embodiment of the present invention, the polyacid clusters and heteropolyacid clusters are selected from phosphomolybdic acid H 3 PMo 12 O 40 , Silicomolybdic acid H 4 SiMo 12 O 40 , phosphotungstic acid H 3 PW 12 O 40 , phosphotungstic acid H 6 P 2 W 18 O 62 , arsenic acid H 3 AsW 12 O 40 , arsenic acid H 6 As 2 W 18 O 62 , silicotungstic acid H 4 SiW 12 O 40 and borotungstic acid H 3 BW 12 O 40 one or more of them.

[0032] According to a further preferred embodiment of the present invention, the polyacid clusters and heteropolyacid clusters are selected from phosphotungstic acid H 3 PW 12 O 40 , silicotungstic acid H 4 SiW 12 O 40 and phosphomolybdic acid H 3 PMo 12 O 40 one or more of them. The inventors found that the above-mentioned polyacid clusters and heteropolyacid clusters are selected as dopants for carbon nanotube films, which have the best effect on improving the conductivity of carbon nanotube film...

Embodiment 11

[0099] Example 1 1.0g / mL phosphotungstic acid aqueous solution doped carbon nanotube film

[0100] Weigh 7.0gH 3 PW 12 O 40 Dissolve in 7mL of ultrapure water, soak the carbon nanotube film supported on the glass substrate in the aqueous solution of phosphotungstic acid, the carbon nanotube film will fall off the glass substrate and float on the liquid surface. After soaking for 12 hours, carefully remove the carbon nanotube film on the liquid surface with a glass slide, gently rinse off the excess phosphotungstic acid remaining on the glass slide with ultrapure water, and gently dry it with argon. During the whole process, care should be taken not to damage the integrity of the carbon nanotube film.

[0101]The square resistance of carbon nanotube films and its transmittance at 550nm wavelength were tested by four-probe square resistance meter and UV-visible-near-infrared absorption spectrometer. The square resistance of the carbon nanotube film before doping is 227Ω / sq.,...

Embodiment 2

[0102] Example 2 0.5g / mL phosphotungstic acid aqueous solution doped carbon nanotube film

[0103] The preparation process of Example 1 was repeated, except that the concentration of the aqueous phosphotungstic acid solution was 0.5 g / mL.

[0104] After testing, the square resistance of the carbon nanotube film before doping is 306Ω / sq., and the light transmittance is 91.76%; after doping, the square resistance of the carbon nanotube film is 198Ω / sq. The rate is 90.8%.

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Abstract

The invention provides a doped carbon nanotube film and a preparation method thereof, the doped carbon nanotube film is prepared from a carbon nanotube film and a dopant, the adopted dopant solid acid is good in stability and not easy to volatilize, the stability of the doping effect on the carbon nanotube film is high, and the doped carbon nanotube film is good in conductivity. And meanwhile, the conductivity of the carbon nanotube film can be effectively improved under the condition that the light transmittance of the carbon nanotube film is basically not reduced. The preparation method is simple, the doping stability is good, the sheet resistance and the light transmittance of the doped carbon nanotube film are basically kept unchanged after the doped carbon nanotube film is placed at room temperature for many days, and the application of the carbon nanotube film in flexible photovoltaic devices and flexible displays can be promoted.

Description

technical field [0001] The invention relates to a method for doping carbon nanotubes, in particular to the use of an inorganic solid acid as a carbon nanotube dopant and a doping method. Background technique [0002] The unique structure and excellent properties of carbon nanotubes make them have important application value in display, energy conversion and storage, sensors, optoelectronic devices and many other fields. In recent years, with the rapid development of flexible devices and wearable devices, the flexibility of devices has become the main development trend in the future. Carbon nanotubes have excellent flexibility, good electrical conductivity and light transmission properties, and are very suitable for flexible devices. For example, carbon nanotube films are expected to be used as transparent electrodes in flexible display devices and flexible photovoltaic devices. Therefore, carbon nanotube films with high electrical conductivity and high light transmittance ...

Claims

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Application Information

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IPC IPC(8): C01B32/168H01B1/18H01B5/14H01B13/00
CPCC01B32/168H01B1/18H01B5/14H01B13/00H01B13/0026C01B2202/22
Inventor 李彦张则尧闫文卿
Owner PEKING UNIV
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