Carbon nanofiber/diamond composite thin-film material and application thereof as thermal battery energy conversion device

A carbon nanofiber, diamond thin film technology, applied in the direction of thermoelectric device node lead wire material, etc., can solve problems such as complex equipment system, application limitation, etc., to achieve the effect of improving light-heat transmission efficiency and stable performance

Active Publication Date: 2016-06-01
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology

Although this method can greatly reduce the cost of solar power generation and improve the conversion efficienc

Method used

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  • Carbon nanofiber/diamond composite thin-film material and application thereof as thermal battery energy conversion device
  • Carbon nanofiber/diamond composite thin-film material and application thereof as thermal battery energy conversion device
  • Carbon nanofiber/diamond composite thin-film material and application thereof as thermal battery energy conversion device

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Embodiment 1

[0040] The preparation process of the carbon nanofiber / diamond composite film material in this embodiment is as follows:

[0041] (1) On the polished silicon wafer substrate, select the microwave plasma chemical vapor deposition method to prepare a diamond film, then soak it in a KOH solution with a concentration of 20wt.% at 75°C, peel off the silicon wafer substrate after soaking for 12 hours to obtain Self-supporting diamond film; the process parameters of the microwave plasma chemical vapor deposition method are as follows: the microwave power is 3000 watts, the air pressure is 5-100 Torr, the raw gas is methane and hydrogen (carrier gas), and the methane content is 10%. The roughness of the silicon wafer base used is less than 5nm, the thickness of the silicon wafer base is 300-500 μm, and the silicon wafer base is preferably a doped p / n type silicon wafer, which is conducive to the growth of diamond.

[0042] (2) Prepare a groove structure on the surface of the diamond f...

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Abstract

The invention discloses a carbon nanofiber/diamond composite thin-film material and an application thereof as a thermal battery energy conversion device. A diamond thin-film is deposited on an ordinary silicon wafer substrate by a microwave plasma technology; a silicon substrate is etched away by 20% KOH solution to prepare a self-supported diamond thin-film; a metal thin-film is deposited on the diamond thin-film by an electron beam evaporation-deposition method or a magnetron sputtering method; and a carbon nanofiber layer grows on the metal thin-film. The carbon nanofiber growing by the method has very high absorptivity within a near-total sunlight wave band, and can convert solar radiation energy into thermal energy; and a diamond thin-film substrate has good thermal conductivity, can quickly conduct the heat absorbed by the carbon nanofiber to a thermoelectric energy conversion material of a semiconductor, is integrated with a solar-thermal battery device and achieves high-efficiency solar-electrical energy conversion. The carbon nanofiber/diamond composite thin-film material has good industrial application prospect and basic scientific research value.

Description

technical field [0001] The invention relates to the technical field of composite material preparation and energy conversion devices for thermal batteries, in particular to a carbon nanofiber / diamond composite film material and its application as a thermal battery energy conversion device. Background technique [0002] In recent years, as the imbalance between energy supply and economic development has become prominent, the energy crisis and environmental pollution have become increasingly serious worldwide. "Energy saving and carbon reduction" and the search for clean energy technologies are issues of concern to all countries today. Solar energy is a kind of clean and renewable energy, which has been widely used in people's daily life and work and has become an ideal energy choice. This first requires the conversion of solar energy into electrical or thermal energy, ie photovoltaic and photothermal solar conversion. [0003] Taking ordinary commercial silicon-based photovol...

Claims

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Application Information

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IPC IPC(8): H01L35/22
Inventor 姜辛邰凯平庄昊黄楠邱建航
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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