US20150300695A1 - Heat conversion member and heat conversion laminate - Google Patents

Heat conversion member and heat conversion laminate Download PDF

Info

Publication number
US20150300695A1
US20150300695A1 US14/437,570 US201314437570A US2015300695A1 US 20150300695 A1 US20150300695 A1 US 20150300695A1 US 201314437570 A US201314437570 A US 201314437570A US 2015300695 A1 US2015300695 A1 US 2015300695A1
Authority
US
United States
Prior art keywords
heat conversion
conversion member
present
fesi
film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US14/437,570
Inventor
Norihito Takeuchi
Kazuto Noritake
Toru Sasatani
Takuhito Tsutsui
Yoshiki Okuhara
Seiichi Suda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Industries Corp
Japan Fine Ceramics Center
Original Assignee
Toyota Industries Corp
Japan Fine Ceramics Center
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Industries Corp, Japan Fine Ceramics Center filed Critical Toyota Industries Corp
Assigned to JAPAN FINE CERAMICS CENTER, KABUSHIKI KAISHA TOYOTA JIDOSHOKKI reassignment JAPAN FINE CERAMICS CENTER ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NORITAKE, KAZUTO, SASATANI, TORU, TAKEUCHI, NORIHITO, TSUTSUI, Takuhito, OKUHARA, YOSHIKI, SUDA, SEIICHI
Publication of US20150300695A1 publication Critical patent/US20150300695A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S70/00—Details of absorbing elements
    • F24S70/10—Details of absorbing elements characterised by the absorbing material
    • F24S70/12—Details of absorbing elements characterised by the absorbing material made of metallic material
    • F24J2/481—
    • F24J2/484—
    • F24J2/485—
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S70/00—Details of absorbing elements
    • F24S70/10—Details of absorbing elements characterised by the absorbing material
    • F24S70/16—Details of absorbing elements characterised by the absorbing material made of ceramic; made of concrete; made of natural stone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S70/00—Details of absorbing elements
    • F24S70/20—Details of absorbing elements characterised by absorbing coatings; characterised by surface treatment for increasing absorption
    • F24S70/225—Details of absorbing elements characterised by absorbing coatings; characterised by surface treatment for increasing absorption for spectrally selective absorption
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/0248—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies
    • H01L31/0256—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies characterised by the material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers

Definitions

  • the present invention relates to a heat conversion member and to a heat conversion laminate.
  • Photovoltaic power generation systems are known that convert sunlight to heat and utilize the heat for electric power generation.
  • sunlight is collected with a collector and the collected sunlight is used to heat a heating medium (such as oil, dissolved salts or molten sodium) in a container or flow channel.
  • a heating medium such as oil, dissolved salts or molten sodium
  • Provision of covering materials, thin-films and the like on the surfaces of containers or flow channels is also being studied as a way of accelerating heating of the heating medium by the collected sunlight.
  • a covering material is provided on the surface of a container or flow channel, and the covering material promotes absorption of collected sunlight while minimizing heat release by heat radiation from the container or flow channel to the exterior.
  • PTL 1 proposes a method for producing a solar heat collector comprising a first glass tube having a vacuum interior and allowing sunlight to impinge from the exterior, and a second glass tube or metal tube provided on the inner side of the first glass tube and having a selective absorbing film on the surface, the selective absorbing film being composed of a metal film that contacts with the second glass tube or metal tube and a dielectric thin-film adhering onto the metal film, wherein the metal film is formed by an electroless plating method selected from among nickel, cobalt, silver and copper plating, and the dielectric thin-film is formed by coating a film by a method of coating a solution of one kind or a mixture selected from among titanium dioxide, tantalum pentoxide and niobium pentoxide, followed by heat treatment of the film
  • PTL 2 proposes a coating composition for the heat-collecting surface of a solar heat collector, comprising a pigment with a high solar absorption rate that is highly permeable to infrared rays, polymethylpentene, and a solvent that dissolves polymethylpentene
  • PTL 3 proposes a solar heat collecting apparatus utilizing sunlight energy, the solar heat collecting apparatus comprising a wavelength converter that absorbs at least a portion of sunlight and converts it to light of a different wavelength, and a heat accumulator that absorbs light emitted from the wavelength converter and generates heat.
  • PTL 4 proposes a sunlight selective absorption coating having a sunlight absorbing property and low emissivity, the sunlight selective absorption coating comprising a support ( 1 ) of a metal, dielectric material or ceramic material, at least one mid-to-far-infrared ray highly-reflecting metal layer ( 2 ) accumulated on the support ( 1 ), a multilayer absorbing structure ( 3 ) composed of an alternating dielectric layer ( 5 ) and metal layer ( 6 ), accumulated on the metal reflective layer ( 2 ), and at least one anti-reflection dielectric layer ( 4 ), accumulated on the multilayer absorbing structure ( 3 ), the dielectric layers ( 5 ) of the multilayer absorbing structure ( 3 ) being either of the same or different thicknesses and/or compositions, the metal layers ( 6 ) of the multilayer absorbing structure ( 3 ) being either of the same or different thicknesses and/or compositions, the respective thicknesses of the metal layers ( 6 ) and dielectric layers ( 5 ) of the multilayer
  • a heat conversion member comprising a composite material of one or more kinds of semiconductor and one or more kinds of metal material.
  • a heat conversion laminate having laminated at least one or more layers including at least the heat conversion member according to (5) or (6), and a metal layer.
  • a heat conversion laminate having laminated at least a metal layer, one or more layers including at least the heat conversion member according to (5) or (6), and a transparent dielectric layer, in that order.
  • a heat conversion member that can efficiently convert light to heat.
  • a heat conversion laminate comprising a heat conversion member that can efficiently convert light to heat.
  • FIG. 1 is a cross-sectional schematic drawing showing a heat conversion laminate 1 as one embodiment of a heat conversion laminate according to the present invention.
  • FIG. 2 is a graph showing the results for the absorption properties of a Ag—FeSi 2 “metasemi” monolayer film.
  • FIG. 3 is a graph showing the results for the absorption properties of a Mo—FeSi 2 “metasemi” monolayer film.
  • FIG. 4 is a graph showing the results for the absorption properties of a Cu—FeSi 2 “metasemi” monolayer film.
  • the heat conversion member of the present invention is a heat conversion member comprising a composite material of one or more kinds of semiconductor and one or more kinds of metal material.
  • the heat conversion member of the present invention allows the absorption property for sunlight to be varied by adjusting the content (addition rate) of the one or more kinds of metal material, thereby allowing efficient conversion of light to heat with improved optical selectivity.
  • optical selectivity refers to dramatic change in the optical characteristics, such as reflectance at certain wavelengths or certain wavelength ranges.
  • the one or more kinds of semiconductor in the composite material in the heat conversion member of the present invention may be of a single kind of semiconductor, or a mixture of two or more different kinds of semiconductor.
  • the one or more kinds of metal material in the composite material in the heat conversion member of the present invention may also be a single kind of metal material or a mixture of two or more different kinds of metal material.
  • the metal material in the composite material in the heat conversion member of the present invention is not particularly restricted and may be an Ag material, Mo material or Cu material, for example.
  • the one or more kinds of metal material in the composite material in the heat conversion member of the present invention may be in any desired form, but is preferably in the form of particles. If the one or more kinds of metal material is in particle form, it may be metallic particles or metal fine particles. The particle diameter of particles of the metal material is preferably 1-100 nm.
  • the heat conversion member of the present invention may be in any desired form, such as in the form of a film shape, tube shape, sheet shape or the like, however a film shape is preferred.
  • the thickness of a film of the heat conversion member of the present invention may be any desired thickness so long as the effect of the present invention is exhibited, however preferably a film of the heat conversion member of the present invention has a thickness of 1 nm to 10 ⁇ m, and more preferably it has a thickness of 5 nm to 100 nm.
  • the content of the one or more kinds of metal material in the heat conversion member of the present invention may be as desired, such as 1-50 vol %, for example.
  • the heat conversion member of the present invention may yet also contain any desired material other than a composite material of the one or more kinds of semiconductor and one or more kinds of metal materials.
  • a transparent dielectric material such as SiO 2 may be mixed in the form of particulates or fine particulates.
  • the heat conversion member of the present invention can be obtained by any desired publicly known production method.
  • the heat conversion member of the present invention can be produced by physical vapor phase deposition (PVD), sputtering or the like.
  • the heat conversion laminate of the present invention has laminated one or more layers comprising a film-like heat conversion member of the present invention, and a metal layer, and it may have a metal layer and one or more layers comprising a film-like heat conversion member of the present invention laminated in that order, or the lamination may be in the reverse order.
  • the heat conversion laminate of the present invention also have at least a metal layer, one or more layers comprising a film-like heat conversion member of the present invention and a transparent dielectric layer, laminated in that order.
  • the one or more layers containing a film-like heat conversion member of the present invention in the heat conversion laminate of the present invention may be constructed as a photoabsorbing layer, and this allows the absorption property for sunlight to be varied by adjusting the content of the one or more kinds of metal material, thereby allowing efficient conversion of light to heat with improved optical selectivity.
  • the thickness of the one or more layers comprising a film-like heat conversion member in the heat conversion laminate of the present invention may be any desired thickness so long as the effect of the present invention is exhibited, and it is preferably a thickness of 5 nm to 100 nm.
  • the layer comprising the film-like heat conversion member in the heat conversion laminate of the present invention may be a single layer or multiple layers.
  • the one or more layers comprising a film-like heat conversion member in the heat conversion laminate of the present invention may also include any materials other than the film-like heat conversion member.
  • the metal layer in the heat conversion laminate of the present invention may be constructed as an infrared anti-reflection layer.
  • the metal layer in the heat conversion laminate of the present invention is not particularly restricted, and for example, it may be a molybdenum (Mo) layer, tungsten (W) layer, silver (Ag) layer, gold (Au) layer, copper (Cu) layer or the like, and is preferably a molybdenum (Mo) layer.
  • the thickness of the metal layer in the heat conversion laminate of the present invention may have any desired thickness so long as the effect of the present invention is exhibited, and it is preferably a thickness of 100 nm or greater.
  • the transparent dielectric layer in the heat conversion laminate of the present invention may also be constructed as an anti-reflection layer.
  • the transparent dielectric layer in the heat conversion laminate of the present invention is not particularly restricted, and examples include a SiO 2 layer, Al 2 O 3 layer, AlN layer or the like, with a SiO 2 layer being preferred.
  • the thickness of the transparent dielectric layer in the heat conversion laminate of the present invention may be any desired thickness so long as the effect of the present invention is exhibited, and it is preferably a thickness of 10 nm to 500 nm.
  • the heat conversion laminate of the present invention may also include an absorbing layer other than a heat conversion member of the present invention, as a photoabsorbing layer.
  • the heat conversion laminate of the present invention can be obtained by any desired publicly known production method.
  • the heat conversion laminate of the present invention can be produced by physical vapor phase deposition (PVD), sputtering or the like.
  • the heat conversion laminate of the present invention will now be explained in greater detail with reference to FIG. 1 .
  • the heat conversion laminate of the present invention is not limited to the embodiment of the present invention shown in FIG. 1 , such as is within the scope of the object and gist of the present invention.
  • FIG. 1 is a drawing showing a heat conversion laminate 1 as one embodiment of a heat conversion laminate according to an embodiment of the present invention.
  • the heat conversion laminate 1 according to an embodiment of the present invention is formed from a transparent dielectric layer 11 , a layer comprising a heat conversion member (photoabsorbing layer) 12 , and a metal layer 13 .
  • the layer comprising a heat conversion member (photoabsorbing layer) 12 comprises metal fine particles 121 and a semiconductor 122 . As shown in FIG. 1 , the metal fine particles 121 are dispersed within the semiconductor 122 .
  • the absorption properties of a heat conversion member of the present invention were evaluated using an Ag—FeSi 2 “metasemi” monolayer film.
  • metalsemi means “metal+semiconductor”.
  • optical constants (refractive index n, extinction coefficient k) of the Ag—FeSi 2 metasemi were calculated for the obtained sample from the measurement data with a spectroscopic ellipsometer and the reflectance property and transmittance property measured with a spectrophotometer.
  • FIG. 2 shows the results for the absorption properties of a Ag—FeSi 2 metasemi monolayer film.
  • the absorption properties of a heat conversion member of the present invention were evaluated using a Mo—FeSi 2 metasemi monolayer film.
  • optical constants (refractive index n, extinction coefficient k) of the Mo—FeSi 2 metasemi were calculated for the obtained sample from the measurement data with a spectroscopic ellipsometer and the reflectance property and transmittance property measured with a spectrophotometer.
  • FIG. 3 shows the results for the absorption properties of a Mo—FeSi 2 metasemi monolayer film.
  • the absorption properties of a heat conversion member of the present invention were evaluated using an Cu—FeSi 2 metasemi monolayer film.
  • optical constants (refractive index n, extinction coefficient k) of the Cu—FeSi 2 metasemi were calculated for the obtained sample from the measurement data with a spectroscopic ellipsometer and the reflectance property and transmittance property measured with a spectrophotometer.
  • FIG. 4 shows the results for the absorption properties of a Cu—FeSi 2 metasemi monolayer film.
  • FeSi 2 was sputtered to form a film.
  • a FeSi 2 sample was fabricated.
  • optical constants (refractive index n, extinction coefficient k) of the FeSi 2 were calculated for the obtained sample from the measurement data with a spectroscopic ellipsometer and the reflectance property and transmittance property measured with a spectrophotometer.
  • FIG. 2 to FIG. 4 show the results for the absorption properties of a FeSi 2 monolayer film.
  • the absorption property curve shifts toward the long wavelength end as the amount of Ag (silver) addition increases (0 vol % ⁇ 4.0 vol % ⁇ 8.6 vol %).
  • the sunlight absorption property of the Ag—FeSi 2 metasemi monolayer film can be varied by adjusting the Ag (silver) material content (amount of addition), it is possible to increase the optical selectivity and accomplish efficient conversion of light to heat.
  • the absorption property curve shifts toward the long wavelength end as the amount of Mo (molybdenum) addition increases (0 vol % ⁇ 4.2 vol % ⁇ 9.4 vol %).
  • the sunlight absorption property of the Mo—FeSi 2 metasemi monolayer film can be varied by adjusting the Mo (molybdenum) material content (amount of addition), it is possible to increase the optical selectivity and accomplish efficient conversion of light to heat.
  • the absorption property curve shifts toward the long wavelength end as the amount of Cu (copper) addition increases (0 vol % ⁇ 8.1 vol %).
  • the sunlight absorption property of the Cu—FeSi 2 metasemi monolayer film can be varied by adjusting the Cu (copper) material content (amount of addition), it is possible to increase the optical selectivity and accomplish efficient conversion of light to heat.
  • the absorption property curve can be shifted toward the long wavelength end compared to a FeSi 2 monolayer film, as shown in FIGS. 2 to 4 , and optical selectivity is maintained even after shifting.
  • the heat conversion member of the present invention may be laminated on a metal layer as an infrared ray-reflective layer, and a transparent dielectric layer may be additionally formed as an anti-reflection layer.

Abstract

The present invention addresses the problem of providing a heat conversion member capable of efficiently converting light to heat. This heat conversion member is characterized in that it includes a composite material of at least one type of semiconductor and at least one type of metal material.

Description

    TECHNICAL FIELD
  • The present invention relates to a heat conversion member and to a heat conversion laminate.
    • BACKGROUND ART
  • Photovoltaic power generation systems are known that convert sunlight to heat and utilize the heat for electric power generation. In the known systems, sunlight is collected with a collector and the collected sunlight is used to heat a heating medium (such as oil, dissolved salts or molten sodium) in a container or flow channel. Provision of covering materials, thin-films and the like on the surfaces of containers or flow channels is also being studied as a way of accelerating heating of the heating medium by the collected sunlight.
  • In NPL 1, for example, a covering material is provided on the surface of a container or flow channel, and the covering material promotes absorption of collected sunlight while minimizing heat release by heat radiation from the container or flow channel to the exterior. As another example, PTL 1 proposes a method for producing a solar heat collector comprising a first glass tube having a vacuum interior and allowing sunlight to impinge from the exterior, and a second glass tube or metal tube provided on the inner side of the first glass tube and having a selective absorbing film on the surface, the selective absorbing film being composed of a metal film that contacts with the second glass tube or metal tube and a dielectric thin-film adhering onto the metal film, wherein the metal film is formed by an electroless plating method selected from among nickel, cobalt, silver and copper plating, and the dielectric thin-film is formed by coating a film by a method of coating a solution of one kind or a mixture selected from among titanium dioxide, tantalum pentoxide and niobium pentoxide, followed by heat treatment of the film at 500° C. or higher in an oxidizing atmosphere. Also, PTL 2 proposes a coating composition for the heat-collecting surface of a solar heat collector, comprising a pigment with a high solar absorption rate that is highly permeable to infrared rays, polymethylpentene, and a solvent that dissolves polymethylpentene, while PTL 3 proposes a solar heat collecting apparatus utilizing sunlight energy, the solar heat collecting apparatus comprising a wavelength converter that absorbs at least a portion of sunlight and converts it to light of a different wavelength, and a heat accumulator that absorbs light emitted from the wavelength converter and generates heat. In addition, PTL 4 proposes a sunlight selective absorption coating having a sunlight absorbing property and low emissivity, the sunlight selective absorption coating comprising a support (1) of a metal, dielectric material or ceramic material, at least one mid-to-far-infrared ray highly-reflecting metal layer (2) accumulated on the support (1), a multilayer absorbing structure (3) composed of an alternating dielectric layer (5) and metal layer (6), accumulated on the metal reflective layer (2), and at least one anti-reflection dielectric layer (4), accumulated on the multilayer absorbing structure (3), the dielectric layers (5) of the multilayer absorbing structure (3) being either of the same or different thicknesses and/or compositions, the metal layers (6) of the multilayer absorbing structure (3) being either of the same or different thicknesses and/or compositions, the respective thicknesses of the metal layers (6) and dielectric layers (5) of the multilayer absorbing structure (3) being less than 10 nm and preferably less than 1 nm, the total thickness of the multilayer absorbing structure (3) being 5-1000 nm, wherein it is specified that the layer of the dielectric material of the sunlight selective absorption coating is accumulated by reactive sputtering including an inert gas and a reactive gas in a chamber or a part of a chamber in which the dielectric layer is to be accumulated, and the metal layer of the sunlight selective absorption coating is accumulated by DC sputtering, introducing only an inert gas into a chamber or part of a chamber in which the metal sheet is to be accumulated.
    • CITATION LIST Patent Literature
    • [PTL 1] Japanese Unexamined Patent Publication No. 59-056661
    • [PTL 2] Japanese Unexamined Patent Publication No. 58-001760
    • [PTL 3] Japanese Unexamined Patent Publication No. 2010-002077
    • [PTL 4] Japanese Patent Public Inspection No. 2012-506021
    Non Patent Literature
    • [NPL 1] July 2002, NREL/TP-520-31267, “Review of Mid-to High-Temperature Solar Selective Absorber Materials”, C. E. Kennedy.
    SUMMARY OF INVENTION Technical Problem
  • At the current time, it is desirable to achieve more accelerated heating of heating media by collected sunlight and achieve more efficient light-to-heat conversion.
  • It is an object of the present invention to provide a heat conversion member that can efficiently convert light to heat. It is another object of the present invention to provide a heat conversion laminate comprising a heat conversion member that can efficiently convert light to heat.
    • Solution to Problem
  • The means for achieving these objects is described by the following (1) to (8).
  • (1) A heat conversion member comprising a composite material of one or more kinds of semiconductor and one or more kinds of metal material.
  • (2) The heat conversion member according to (1), wherein the metal material is in the form of particles.
  • (3) The heat conversion member according to (1) or (2), wherein the semiconductor comprises FeSiX (X=0.5-4).
  • (4) The heat conversion member according to (3), wherein X in FeSiX is 2.
  • (5) The heat conversion member according to any one of (1) to (4), which is film-shaped.
  • (6) The heat conversion member according to (5), wherein the film shape has a thickness of 1 nm to 10 μm.
  • (7) A heat conversion laminate having laminated at least one or more layers including at least the heat conversion member according to (5) or (6), and a metal layer.
  • (8) A heat conversion laminate having laminated at least a metal layer, one or more layers including at least the heat conversion member according to (5) or (6), and a transparent dielectric layer, in that order.
    • Advantageous Effects of Invention
  • According to the present invention, there is provided a heat conversion member that can efficiently convert light to heat. According to the present invention, there is further provided a heat conversion laminate comprising a heat conversion member that can efficiently convert light to heat.
    • BRIEF DESCRIPTION OF DRAWINGS
  • FIG. 1 is a cross-sectional schematic drawing showing a heat conversion laminate 1 as one embodiment of a heat conversion laminate according to the present invention.
  • FIG. 2 is a graph showing the results for the absorption properties of a Ag—FeSi2 “metasemi” monolayer film.
  • FIG. 3 is a graph showing the results for the absorption properties of a Mo—FeSi2 “metasemi” monolayer film.
  • FIG. 4 is a graph showing the results for the absorption properties of a Cu—FeSi2 “metasemi” monolayer film.
    •  DESCRIPTION OF EMBODIMENTS (1) Heat Conversion Member
  • The heat conversion member of the present invention is a heat conversion member comprising a composite material of one or more kinds of semiconductor and one or more kinds of metal material. The heat conversion member of the present invention allows the absorption property for sunlight to be varied by adjusting the content (addition rate) of the one or more kinds of metal material, thereby allowing efficient conversion of light to heat with improved optical selectivity. Here, “optical selectivity” refers to dramatic change in the optical characteristics, such as reflectance at certain wavelengths or certain wavelength ranges.
  • The one or more kinds of semiconductor in the composite material in the heat conversion member of the present invention (also referred to as “composite material”) may be of a single kind of semiconductor, or a mixture of two or more different kinds of semiconductor.
  • The semiconductor of a composite material in the heat conversion member of the present invention is not particularly restricted, and may be FeSiX (X=0.5-4), for example.
  • The one or more kinds of metal material in the composite material in the heat conversion member of the present invention may also be a single kind of metal material or a mixture of two or more different kinds of metal material.
  • The metal material in the composite material in the heat conversion member of the present invention is not particularly restricted and may be an Ag material, Mo material or Cu material, for example.
  • The one or more kinds of metal material in the composite material in the heat conversion member of the present invention may be in any desired form, but is preferably in the form of particles. If the one or more kinds of metal material is in particle form, it may be metallic particles or metal fine particles. The particle diameter of particles of the metal material is preferably 1-100 nm.
  • The one or more kinds of semiconductor in the composite material in the heat conversion member of the present invention preferably contains FeSiX (X=0.5-4) and more preferably contains FeSi2.
  • The heat conversion member of the present invention may be in any desired form, such as in the form of a film shape, tube shape, sheet shape or the like, however a film shape is preferred. The thickness of a film of the heat conversion member of the present invention may be any desired thickness so long as the effect of the present invention is exhibited, however preferably a film of the heat conversion member of the present invention has a thickness of 1 nm to 10 μm, and more preferably it has a thickness of 5 nm to 100 nm.
  • The content of the one or more kinds of metal material in the heat conversion member of the present invention may be as desired, such as 1-50 vol %, for example.
  • The heat conversion member of the present invention may yet also contain any desired material other than a composite material of the one or more kinds of semiconductor and one or more kinds of metal materials. For example, a transparent dielectric material such as SiO2 may be mixed in the form of particulates or fine particulates.
  • The heat conversion member of the present invention can be obtained by any desired publicly known production method. For example, the heat conversion member of the present invention can be produced by physical vapor phase deposition (PVD), sputtering or the like.
    • (2) Heat Conversion Laminate
  • As one feature, the heat conversion laminate of the present invention has laminated one or more layers comprising a film-like heat conversion member of the present invention, and a metal layer, and it may have a metal layer and one or more layers comprising a film-like heat conversion member of the present invention laminated in that order, or the lamination may be in the reverse order.
  • As another feature, the heat conversion laminate of the present invention also have at least a metal layer, one or more layers comprising a film-like heat conversion member of the present invention and a transparent dielectric layer, laminated in that order.
  • The one or more layers containing a film-like heat conversion member of the present invention in the heat conversion laminate of the present invention may be constructed as a photoabsorbing layer, and this allows the absorption property for sunlight to be varied by adjusting the content of the one or more kinds of metal material, thereby allowing efficient conversion of light to heat with improved optical selectivity. The thickness of the one or more layers comprising a film-like heat conversion member in the heat conversion laminate of the present invention may be any desired thickness so long as the effect of the present invention is exhibited, and it is preferably a thickness of 5 nm to 100 nm. The layer comprising the film-like heat conversion member in the heat conversion laminate of the present invention may be a single layer or multiple layers. The one or more layers comprising a film-like heat conversion member in the heat conversion laminate of the present invention may also include any materials other than the film-like heat conversion member.
  • The metal layer in the heat conversion laminate of the present invention may be constructed as an infrared anti-reflection layer. The metal layer in the heat conversion laminate of the present invention is not particularly restricted, and for example, it may be a molybdenum (Mo) layer, tungsten (W) layer, silver (Ag) layer, gold (Au) layer, copper (Cu) layer or the like, and is preferably a molybdenum (Mo) layer. The thickness of the metal layer in the heat conversion laminate of the present invention may have any desired thickness so long as the effect of the present invention is exhibited, and it is preferably a thickness of 100 nm or greater.
  • The transparent dielectric layer in the heat conversion laminate of the present invention may also be constructed as an anti-reflection layer. The transparent dielectric layer in the heat conversion laminate of the present invention is not particularly restricted, and examples include a SiO2 layer, Al2O3 layer, AlN layer or the like, with a SiO2 layer being preferred. The thickness of the transparent dielectric layer in the heat conversion laminate of the present invention may be any desired thickness so long as the effect of the present invention is exhibited, and it is preferably a thickness of 10 nm to 500 nm.
  • The heat conversion laminate of the present invention may also include an absorbing layer other than a heat conversion member of the present invention, as a photoabsorbing layer.
  • The heat conversion laminate of the present invention can be obtained by any desired publicly known production method. For example, the heat conversion laminate of the present invention can be produced by physical vapor phase deposition (PVD), sputtering or the like.
  • The heat conversion laminate of the present invention will now be explained in greater detail with reference to FIG. 1. Incidentally, the heat conversion laminate of the present invention is not limited to the embodiment of the present invention shown in FIG. 1, such as is within the scope of the object and gist of the present invention.
  • FIG. 1 is a drawing showing a heat conversion laminate 1 as one embodiment of a heat conversion laminate according to an embodiment of the present invention. The heat conversion laminate 1 according to an embodiment of the present invention is formed from a transparent dielectric layer 11, a layer comprising a heat conversion member (photoabsorbing layer) 12, and a metal layer 13. Also, the layer comprising a heat conversion member (photoabsorbing layer) 12 comprises metal fine particles 121 and a semiconductor 122. As shown in FIG. 1, the metal fine particles 121 are dispersed within the semiconductor 122.
    • EXAMPLES
  • Examples will now be provided for a more concrete explanation of the present invention. The present invention is not limited to these examples, however, provided that the object and gist of the present invention are maintained.
    • <Evaluation of Absorption Properties of Heat Conversion Member>
  • The absorption properties of heat conversion members were evaluated using Examples 1 to 3 and Comparative Example 1.
    • Example 1
  • The absorption properties of a heat conversion member of the present invention were evaluated using an Ag—FeSi2 “metasemi” monolayer film. The term “metasemi” means “metal+semiconductor”.
    • [Method of Forming Ag—FeSi2 Metasemi Monolayer Film]
  • On a quartz substrate at room temperature, FeSi2 and Ag (silver) were simultaneously sputtered to form a film. Following film formation, annealing was performed for 1 hour in a vacuum furnace at a temperature of no higher than 800° C. Two Ag—FeSi2 metasemi samples with different Ag (silver) addition rates (4.0 vol %, 8.6 vol %) were prepared.
  • The optical constants (refractive index n, extinction coefficient k) of the Ag—FeSi2 metasemi were calculated for the obtained sample from the measurement data with a spectroscopic ellipsometer and the reflectance property and transmittance property measured with a spectrophotometer.
  • The calculated multilayer film approximation based on the optical constants (n, k) for Ag—FeSi2 metasemi was used to calculate the absorption rate of the Ag—FeSi2 metasemi monolayer film (corresponding to a film thickness of 30 nm). FIG. 2 shows the results for the absorption properties of a Ag—FeSi2 metasemi monolayer film.
    • Example 2
  • The absorption properties of a heat conversion member of the present invention were evaluated using a Mo—FeSi2 metasemi monolayer film.
    • [Method of Forming Mo—FeSi2 Metasemi Monolayer Film]
  • On a quartz substrate heated to a temperature no higher than 700° C., FeSi2 and Mo (molybdenum) were simultaneously sputtered to form a film. Two Mo—FeSi2 metasemi samples with different Mo (molybdenum) addition rates (4.2 vol %, 9.4 vol %) were prepared.
  • The optical constants (refractive index n, extinction coefficient k) of the Mo—FeSi2 metasemi were calculated for the obtained sample from the measurement data with a spectroscopic ellipsometer and the reflectance property and transmittance property measured with a spectrophotometer.
  • The calculated multilayer film approximation based on the optical constants (n, k) for Mo—FeSi2 metasemi was used to calculate the absorption rate of the Mo—FeSi2 metasemi monolayer film (corresponding to a film thickness of 30 nm). FIG. 3 shows the results for the absorption properties of a Mo—FeSi2 metasemi monolayer film.
    • Example 3
  • The absorption properties of a heat conversion member of the present invention were evaluated using an Cu—FeSi2 metasemi monolayer film.
    • [Method of Forming Cu—FeSi2 Metasemi Monolayer Film]
  • On a quartz substrate heated to a temperature no higher than 700° C., FeSi2 and Cu (copper) were simultaneously sputtered to form a film. A Cu—FeSi2 metasemi sample with a Cu (copper) addition rate of 8.1 vol % was prepared.
  • The optical constants (refractive index n, extinction coefficient k) of the Cu—FeSi2 metasemi were calculated for the obtained sample from the measurement data with a spectroscopic ellipsometer and the reflectance property and transmittance property measured with a spectrophotometer.
  • The calculated multilayer film approximation based on the optical constants (n, k) for Cu—FeSi2 metasemi was used to calculate the absorption rate of the Cu—FeSi2 metasemi monolayer film (corresponding to a film thickness of 30 nm). FIG. 4 shows the results for the absorption properties of a Cu—FeSi2 metasemi monolayer film.
    • Comparative Example 1
  • The absorption properties of a FeSi2 monolayer film were evaluated.
    • [Method of Forming FeSi2 Monolayer Film]
  • On a quartz substrate heated to a temperature no higher than 700° C., FeSi2 was sputtered to form a film. A FeSi2 sample was fabricated.
  • The optical constants (refractive index n, extinction coefficient k) of the FeSi2 were calculated for the obtained sample from the measurement data with a spectroscopic ellipsometer and the reflectance property and transmittance property measured with a spectrophotometer.
  • The calculated multilayer film approximation based on the optical constants (n, k) for FeSi2 was used to calculate the absorption rate of the FeSi2 monolayer film (corresponding to a film thickness of 30 nm). FIG. 2 to FIG. 4 show the results for the absorption properties of a FeSi2 monolayer film.
    • <Evaluation Results>
  • Referring to FIG. 2, it is seen that the absorption property curve shifts toward the long wavelength end as the amount of Ag (silver) addition increases (0 vol %→4.0 vol %→8.6 vol %). Thus, since the sunlight absorption property of the Ag—FeSi2 metasemi monolayer film can be varied by adjusting the Ag (silver) material content (amount of addition), it is possible to increase the optical selectivity and accomplish efficient conversion of light to heat.
  • Referring to FIG. 3, it is seen that the absorption property curve shifts toward the long wavelength end as the amount of Mo (molybdenum) addition increases (0 vol %→4.2 vol %→9.4 vol %). Thus, since the sunlight absorption property of the Mo—FeSi2 metasemi monolayer film can be varied by adjusting the Mo (molybdenum) material content (amount of addition), it is possible to increase the optical selectivity and accomplish efficient conversion of light to heat.
  • Referring to FIG. 4, it is seen that the absorption property curve shifts toward the long wavelength end as the amount of Cu (copper) addition increases (0 vol %→8.1 vol %). Thus, since the sunlight absorption property of the Cu—FeSi2 metasemi monolayer film can be varied by adjusting the Cu (copper) material content (amount of addition), it is possible to increase the optical selectivity and accomplish efficient conversion of light to heat. Thus, the absorption property curve can be shifted toward the long wavelength end compared to a FeSi2 monolayer film, as shown in FIGS. 2 to 4, and optical selectivity is maintained even after shifting. It is therefore possible to use the heat conversion member of the present invention in place of a FeSi2 monolayer film. In this case, the heat conversion member of the present invention may be laminated on a metal layer as an infrared ray-reflective layer, and a transparent dielectric layer may be additionally formed as an anti-reflection layer.
    • Example 4
  • The properties of a laminate of the present invention were evaluated.
  • The properties of a laminate prepared by laminating a metal layer, a metasemi layer (photoabsorbing layer) and a transparent dielectric layer in that order were evaluated by calculating the absorption rate using multilayer film approximation, in the same manner, and a shift in properties toward the long wavelength end was confirmed, similar to a monolayer film.
    • REFERENCE SIGNS LIST
    • 1 Heat conversion laminate
    • 11 Transparent dielectric layer
    • 12 Layer comprising heat conversion member (photoabsorbing layer)
    • 13 Metal layer
    • 121 Metal fine particles
    • 122 Semiconductor

Claims (9)

1-8. (canceled)
9. A light-to-heat conversion member comprising a composite material of one or more kinds of semiconductor and one or more kinds of metal material.
10. The light-to-heat conversion member according to claim 9, wherein the metal material is in the form of particles.
11. The light-to-heat conversion member according to claim 9, wherein the semiconductor comprises FeSiX (X=0.5-4).
12. The light-to-heat conversion member according to claim 11, wherein X in FeSiX is 2.
13. The light-to-heat conversion member according to claim 9, which has a film shape.
14. The light-to-heat conversion member according to claim 13, wherein the film shape has a thickness of 1 nm to 10 μm.
15. A light-to-heat conversion laminate having laminated at least one or more layers including the light-to-heat conversion member according to claim 13, and a metal layer.
16. A light-to-heat conversion laminate having laminated at least a metal layer, one or more layers including the light-to-heat conversion member according to claim 13, and a transparent dielectric layer, in that order.
US14/437,570 2012-10-26 2013-10-11 Heat conversion member and heat conversion laminate Abandoned US20150300695A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2012237295A JP6059952B2 (en) 2012-10-26 2012-10-26 Heat conversion member and heat conversion laminate
JP2012-237295 2012-10-26
PCT/JP2013/077828 WO2014065141A1 (en) 2012-10-26 2013-10-11 Heat conversion member and heat conversion laminate

Publications (1)

Publication Number Publication Date
US20150300695A1 true US20150300695A1 (en) 2015-10-22

Family

ID=50544521

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/437,570 Abandoned US20150300695A1 (en) 2012-10-26 2013-10-11 Heat conversion member and heat conversion laminate

Country Status (6)

Country Link
US (1) US20150300695A1 (en)
EP (1) EP2913604B1 (en)
JP (1) JP6059952B2 (en)
CN (1) CN104755854A (en)
ES (1) ES2868097T3 (en)
WO (1) WO2014065141A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150316291A1 (en) * 2012-12-07 2015-11-05 Japan Fine Ceramics Center Optical selective film
US10978988B2 (en) 2016-03-31 2021-04-13 Nippon Steel Corporation Selective emitter for thermophotovoltaic power generator

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2016344685B2 (en) * 2015-10-30 2021-07-08 Rioglass Solar Systems Ltd. Method for the deposition of functional layers suitable for heat receiver tubes
WO2017078163A1 (en) * 2015-11-05 2017-05-11 新日鐵住金株式会社 Thermal-photo conversion member
JP2018174657A (en) * 2017-03-31 2018-11-08 国立大学法人横浜国立大学 Energy conversion device and manufacturing method of the same
CN110887022A (en) * 2018-09-10 2020-03-17 深圳光峰科技股份有限公司 Wavelength conversion device and light source system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6943388B1 (en) * 2004-03-18 2005-09-13 National Institute Of Advanced Industrial Science And Technology Sheet-type β-FeSi2 element, and method and device for manufacturing the same
US20080092953A1 (en) * 2006-05-15 2008-04-24 Stion Corporation Method and structure for thin film photovoltaic materials using bulk semiconductor materials
WO2010041725A1 (en) * 2008-10-07 2010-04-15 住友化学株式会社 Thermoelectric conversion module and thermoelectric conversion element
US20100212328A1 (en) * 2007-06-06 2010-08-26 Junya Murai Thermoelectric converter and method of manufacturing same

Family Cites Families (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5141701B2 (en) * 1972-10-06 1976-11-11
US4312915A (en) * 1978-01-30 1982-01-26 Massachusetts Institute Of Technology Cermet film selective black absorber
AU5318779A (en) * 1979-01-26 1981-07-02 Exxon Research And Engineering Company Solar absorber
EP0017415A1 (en) * 1979-03-26 1980-10-15 National Research Development Corporation Solar heating panels
JPS5911827B2 (en) * 1979-12-27 1984-03-17 シャープ株式会社 Selective absorption surface of heat collection part
JPS56138648A (en) * 1980-03-31 1981-10-29 Tdk Corp Heat collector
US4334523A (en) * 1980-06-23 1982-06-15 Owens-Illinois, Inc. Solar energy collector having solar selective coating of low reflectance
AU7174581A (en) * 1980-07-28 1982-03-02 Owens-Illinois Inc. Solar energy collector having semiconductive coating formed from metal and dielectric
FR2506436B1 (en) * 1981-05-22 1985-09-20 Comp Generale Electricite SELECTIVE ABSORBING PANEL FOR SOLAR COLLECTOR
JPS581760A (en) 1981-06-26 1983-01-07 Mitsubishi Electric Corp Coating composition for solar heat collector surface
JPS5844300B2 (en) * 1981-10-06 1983-10-03 工業技術院長 Solar heat selective absorption film for constituent materials of solar heating products
JPS5956661A (en) 1982-09-27 1984-04-02 Toshiba Corp Manufacture of solar heat collector
AU555903B2 (en) * 1982-10-08 1986-10-16 University Of Sydney, The Solar selective surface coating
DE3374899D1 (en) * 1982-10-08 1988-01-21 Univ Sydney Solar selective surface coating
CN2057504U (en) * 1989-05-05 1990-05-23 马兆贤 Household solar water heater
JP3917261B2 (en) * 1996-09-26 2007-05-23 松下電器産業株式会社 Optical absorber and optical apparatus using the same
JP2006214654A (en) * 2005-02-03 2006-08-17 Nippon Electric Glass Co Ltd Solar heat collecting plate, selective absorption film and solar heat water heater
JP2006229168A (en) * 2005-02-21 2006-08-31 Seiko Epson Corp Heating method and apparatus
CN101400512B (en) * 2006-05-15 2013-10-30 思阳公司 Method and structure for thin film photovoltaic materials using semiconductor materials
JP5152503B2 (en) * 2008-06-18 2013-02-27 シャープ株式会社 Solar heat collector
ES2316321B2 (en) * 2008-10-20 2010-12-14 Abengoa Solar New Technologies, S.A. SOLAR SELECTIVE ABSORBENT COATING AND MANUFACTURING METHOD.
CN201589446U (en) * 2009-04-30 2010-09-22 北京智慧剑科技发展有限责任公司 Internal quartz solar energy light and heat converter
WO2011072213A2 (en) * 2009-12-10 2011-06-16 Virginia Commonwealth University Production of graphene and nanoparticle catalysts supported on graphene using laser radiation
CN201751769U (en) * 2009-12-25 2011-02-23 陈丽华 External-spotlighting and eccentric solar vacuum heat collecting pipe
CN101826823B (en) * 2010-01-29 2012-03-28 中国科学院广州能源研究所 Thermoelectric-conversion solar thermal power generation system
WO2011135974A1 (en) * 2010-04-26 2011-11-03 一般財団法人川村理化学研究所 Infrared-ray-absorbable thin film containing rutile-type titanium oxide crystals, and process for production thereof
CN101975454B (en) * 2010-08-13 2012-11-28 佛山市高明区通洋高科太阳能有限公司 Cyclic heating device and cyclic heating method for solar water heater
CN103392387A (en) * 2011-02-25 2013-11-13 东京毅力科创株式会社 Film forming method and film forming device
KR101210043B1 (en) * 2011-03-22 2012-12-07 엘지이노텍 주식회사 Solar cell apparatus and method of fabricating the same
JP5687606B2 (en) * 2011-11-14 2015-03-18 トヨタ自動車株式会社 Solar-heat conversion member, solar-heat conversion device, and solar power generation device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6943388B1 (en) * 2004-03-18 2005-09-13 National Institute Of Advanced Industrial Science And Technology Sheet-type β-FeSi2 element, and method and device for manufacturing the same
US20080092953A1 (en) * 2006-05-15 2008-04-24 Stion Corporation Method and structure for thin film photovoltaic materials using bulk semiconductor materials
US20100212328A1 (en) * 2007-06-06 2010-08-26 Junya Murai Thermoelectric converter and method of manufacturing same
WO2010041725A1 (en) * 2008-10-07 2010-04-15 住友化学株式会社 Thermoelectric conversion module and thermoelectric conversion element
US20120097206A1 (en) * 2008-10-07 2012-04-26 Sumitomo Chemical Company, Limited Thermoelectric conversion module and thermoelectric conversion element

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150316291A1 (en) * 2012-12-07 2015-11-05 Japan Fine Ceramics Center Optical selective film
US9970684B2 (en) * 2012-12-07 2018-05-15 Kabushiki Kaisha Toyota Jidoshokki Optical selective film
US10978988B2 (en) 2016-03-31 2021-04-13 Nippon Steel Corporation Selective emitter for thermophotovoltaic power generator

Also Published As

Publication number Publication date
WO2014065141A1 (en) 2014-05-01
CN104755854A (en) 2015-07-01
EP2913604B1 (en) 2021-04-21
ES2868097T3 (en) 2021-10-21
JP2014085099A (en) 2014-05-12
EP2913604A4 (en) 2016-06-22
EP2913604A1 (en) 2015-09-02
JP6059952B2 (en) 2017-01-11

Similar Documents

Publication Publication Date Title
EP2913604B1 (en) Use of heat-to-light conversion member
Li et al. Scalable all-ceramic nanofilms as highly efficient and thermally stable selective solar absorbers
JP5687606B2 (en) Solar-heat conversion member, solar-heat conversion device, and solar power generation device
WO2005121389A1 (en) Spectrally selective surface coating of the receiver tube of a solar concentrator, and method for the manufacture thereof
Wang et al. An ultrathin, nanogradient, and substrate‐independent WOx‐based film as a high performance flexible solar absorber
US20170336102A1 (en) Enhanced Thermal Stability on Multi-Metal Filled Cermet Based Spectrally Selective Solar Absorbers
WO2013141180A1 (en) Selective light absorption film, heat collection pipe, and solar heat electricity generation device
EP2930446B1 (en) Optical selective film
CN203274309U (en) Solar energy absorbing coating and arrangement of same on substrate
US10302334B2 (en) Sunlight-to-heat converting member, sunlight-to-heat converting stack, sunlight-to-heat converting device, and solar power generating device
US20150285532A1 (en) Heat conversion member and heat conversion laminate
He et al. Efficient solar energy harvesting enabled by high-entropy ceramic nanofilms through a co-sputtering method
Dan et al. Thermal stability of WAlN/WAlON/Al2O3-based solar selective absorber coating
Okuhara et al. Solar selective absorbers based on semiconducting β-FeSi2 for high temperature solar-thermal conversion
EP3255357B1 (en) Solar heat collection tube, solar light/heat conversion device, and solar power generation device

Legal Events

Date Code Title Description
AS Assignment

Owner name: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TAKEUCHI, NORIHITO;NORITAKE, KAZUTO;SASATANI, TORU;AND OTHERS;SIGNING DATES FROM 20150108 TO 20150327;REEL/FRAME:035469/0108

Owner name: JAPAN FINE CERAMICS CENTER, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TAKEUCHI, NORIHITO;NORITAKE, KAZUTO;SASATANI, TORU;AND OTHERS;SIGNING DATES FROM 20150108 TO 20150327;REEL/FRAME:035469/0108

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION