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Metal metasurface filter for thermophotovoltaic

A metasurface and thermophotovoltaic technology, which is applied in instruments, optics, filters, etc., can solve the problems of small feature size of metal metasurface filters, narrow high reflection band of photonic crystal filters, and high cost of preparation methods, so as to improve the The effect of photoelectric conversion efficiency, low cost and low energy loss

Active Publication Date: 2021-08-24
HARBIN INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems of narrow high-reflection band, large energy loss, small feature size of metal metasurface filter and high cost of preparation method of the existing photonic crystal filter, and provides a metal metasurface filter for thermal photovoltaic surface filter

Method used

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  • Metal metasurface filter for thermophotovoltaic
  • Metal metasurface filter for thermophotovoltaic
  • Metal metasurface filter for thermophotovoltaic

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specific Embodiment approach 1

[0022] Specific implementation mode one: combine figure 1 and figure 2 This embodiment is specifically described. In this embodiment, a metal metasurface filter for thermal photovoltaics is composed of a transparent base layer and a noble metal film layer with a subwavelength hole structure;

[0023] One side of the transparent base layer is provided with 1 to 3 noble metal film layers with a subwavelength hole structure, and a filling layer is arranged between adjacent precious metal film layers with a subwavelength hole structure;

[0024] The noble metal film layer with a sub-wavelength hole structure is specifically a hexagonal arrangement of annular through holes on the noble metal film layer; the outer diameter of the annular through hole is 0.2 micron to 0.4 micron, and the inner diameter is 0.1 micron to 0.3 micron; In addition, the center-to-center spacing of adjacent circular through-holes is 0.6 micron to 1 micron.

[0025] The smaller the refractive index of the...

specific Embodiment approach 2

[0034] Embodiment 2: This embodiment differs from Embodiment 1 in that: the transparent base layer and the filling layer are both transparent materials with no optical absorption within the wavelength range of 0.4 microns to 3 microns. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0035] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: both the transparent base layer and the filling layer are magnesium fluoride. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a metal metasurface filter, in particular to a metal metasurface filter for thermophotovoltaic. The invention aims to solve the problems that an existing photonic crystal filter is narrow in high reflection wave band and large in energy loss, the metal metasurface filter is small in feature size and a preparation method is high in cost. The metal metasurface filter used for thermophotovoltaic is composed of a transparent substrate layer and sub-wavelength hole structure precious metal film layers. The sub-wavelength hole structure precious metal film layers are arranged on the transparent substrate layer, and a filling layer is arranged between every two adjacent sub-wavelength hole structure precious metal film layers.

Description

technical field [0001] The invention relates to a metal metasurface filter. Background technique [0002] Thermo-photovoltaics is a technology to achieve high-efficiency photoelectric conversion. Using sunlight as energy, thermo-photovoltaic systems can absorb broadband solar spectrum energy and convert it into narrow-band energy to radiate into photovoltaic cells. In theory, it can break through the limit of traditional single-junction solar cells and reach 85.4% efficiency. [0003] Although the theoretical upper limit of light utilization efficiency of solar thermal photovoltaic cells is high, the actual efficiency is very low. This is because photovoltaic cells use semiconductor materials, and there is a forbidden band width. Radiation waves below the forbidden band width cannot be absorbed, while radiation waves higher than the forbidden band width can be absorbed, and high-energy radiation waves can only be absorbed by a forbidden band width. The excess energy is con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/20G02B5/00H01L31/0216
CPCG02B5/201G02B5/208G02B5/008H01L31/02168
Inventor 潘磊胡越凡田岱马彬邱家稳赵九蓬李垚
Owner HARBIN INST OF TECH
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