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A carbon nanofiber/diamond composite film material and its application as a 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: 2017-12-19
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method can greatly reduce the cost of solar power generation and improve the conversion efficiency of solar energy, it often requires complex equipment systems, which greatly limits the application occasions.

Method used

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  • A carbon nanofiber/diamond composite film material and its application as a thermal battery energy conversion device
  • A carbon nanofiber/diamond composite film material and its application as a thermal battery energy conversion device
  • A carbon nanofiber/diamond composite film material and its application as a 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 its application as a thermal battery energy conversion device. The diamond thin film is deposited on a common silicon chip substrate by microwave plasma technology; the silicon substrate is etched away by a 20% KOH solution. , preparing a self-supporting diamond film; depositing a metal film on the diamond film by electron beam evaporation-deposition or magnetron sputtering, and then growing a carbon nanofiber layer on the metal film. The carbon nanofibers grown by this method have a high absorption rate in almost all solar light bands, which can convert solar radiation energy into heat energy; while the diamond film substrate has good thermal conductivity, which can absorb the heat absorbed by carbon nanofibers. Fast conduction to semiconductor thermoelectric energy conversion materials, integrated solar-thermal battery devices, to achieve high-efficiency solar-electric energy conversion. The invention 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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Patent Type & Authority Patents(China)
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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