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A thermal radiator with a three-dimensional core-shell opal structure for thermal photovoltaics and its preparation method

A heat radiator and core-shell protein technology, which is applied in the field of three-dimensional core-shell opal structure heat radiators for thermal photovoltaics and its preparation, can solve the problems of low spectral efficiency, high manufacturing cost and high cost of photonic crystal heat radiators, etc.

Active Publication Date: 2022-03-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In 2011, M.Araghchini from the Massachusetts Institute of Technology and others used micro-nano processing technologies such as laser interference lithography and reactive ion etching to fabricate a tungsten flat plate selective thermal radiator with two-dimensional periodic holes, which can achieve a 1.7μm The characteristic of selective emission at the cutoff wavelength, but this scheme has the disadvantages of complicated preparation process, high cost and low spectral efficiency
In 2019, Younghoe Kim from Kookmin University of Korea and others fabricated a three-dimensional photonic crystal thermal radiator of nickel inverse opal by electrochemical deposition. Although the process is simple and the cost is low, the porosity and refractive index of nickel metal are not high. Insufficient spectral control ability
[0004] In view of the problems of high preparation cost and insufficient spectral control performance of photonic crystal thermal radiators in the field of thermal photovoltaics, it is necessary to develop a thermal radiator with low cost and high conversion efficiency in this field.

Method used

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  • A thermal radiator with a three-dimensional core-shell opal structure for thermal photovoltaics and its preparation method
  • A thermal radiator with a three-dimensional core-shell opal structure for thermal photovoltaics and its preparation method
  • A thermal radiator with a three-dimensional core-shell opal structure for thermal photovoltaics and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0233] This embodiment provides a heat radiator with a three-dimensional core-shell opal structure, and its preparation method is as follows:

[0234] 1) Take 0.5g of metal tungsten powder with a particle size of 50nm, and disperse it in 100ml of absolute ethanol for ultrasonic dispersion (the frequency of ultrasonic dispersion is 25kHz and the temperature is 25°C) for 20min to obtain a metal tungsten nanoparticle dispersion (tungsten nanoparticle The number density of the particles is 3.9×10 12 pieces / ml).

[0235] 2) Add 0.3ml of 3-aminopropyltriethoxysilane (APS) to the above-mentioned metal tungsten nanoparticle dispersion liquid, then ultrasonically disperse (the frequency of ultrasonic dispersion is 25kHz and the temperature is 25°C) for 5min, and transfer it into 250ml in a round-bottomed flask at 30°C with magnetic stirring at 800rpm, and stop stirring after 24 hours. This step is to modify the APS macromolecular chains on the outer surface of tungsten nanoparticles t...

Embodiment 2

[0246] This embodiment provides a heat radiator with a three-dimensional core-shell opal structure, the preparation method of which is the same as that of Embodiment 1, the difference is that in step 1), the particle size of metal tungsten powder is measured to be 100 nm.

[0247] Effect

[0248] The scanning electron microscope (SEM) picture of the silica@tungsten core-shell nanospheres prepared in Example 2 is as follows Figure 5 As shown, it can be seen that the particle size of the prepared silica@metal core-shell nanospheres is about 510nm, and it can be seen from the light and dark parts of the particles that they are composed of core-shell structures.

Embodiment 3

[0250] This embodiment provides a heat radiator with a three-dimensional core-shell opal structure. Its preparation method is the same as that of Embodiment 1, except that the amount of ammonia water added in step 5) is 1 ml, and the amount of ultrapure water added is 3 ml.

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Abstract

The invention relates to a thermal radiator with a three-dimensional core-shell opal structure for thermal photovoltaics and a preparation method thereof. Specifically, the present invention provides a thermal radiator with a three-dimensional core-shell opal structure for thermal photovoltaics. The three-dimensional core-shell opal structure thermal radiator It is formed by stacking silica@metal core-shell nanospheres on a substrate with a three-dimensional ordered face-centered cubic (FCC) structure. The thermal radiator with three-dimensional core-shell opal structure for thermal photovoltaic of the present invention has the advantages of low preparation cost, simple preparation process, and the obtained thermal radiator can selectively radiate thermal spectrum, and can be used to improve the conversion efficiency of thermal photovoltaic system.

Description

technical field [0001] The invention relates to the field of thermal photovoltaic energy conversion, in particular to a thermal radiator with a three-dimensional core-shell opal structure for thermal photovoltaic and a preparation method thereof. Background technique [0002] The thermal photovoltaic system converts the heat generated by the heat source into a certain spectral radiation through the thermal radiator, and then receives the radiation spectrum by the semiconductor photovoltaic unit for photoelectric conversion, and finally realizes the energy conversion from thermal energy to light energy and then to electrical energy. It can use the thermal energy generated in various ways to convert electrical energy, including energy conversion in heat-producing fields such as chemical fuels, solar energy, and nuclear energy. Compared with other thermal power generation devices, thermo-photovoltaic systems have greater conversion efficiency, and their theoretical limit effici...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02S10/30C09C1/62C09C3/12C09C3/10C09C3/06C01B33/18B82Y30/00
CPCH02S10/30C09C1/62C09C3/12C09C3/10C09C3/063C09C3/006C01B33/18B82Y30/00C01P2004/80C01P2004/64C01P2004/62C01P2004/32Y02E10/50
Inventor 刘云鹏孟彩峰汤晓斌许志恒王宏宇
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS