JP2017135278A - Thermoelectric conversion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermoelectric conversion device capable of easily increasing a temperature difference between electrodes and increasing an output.SOLUTION: A thermoelectric conversion device 1 includes: a base material 5; a protruding portion 3 disposed on an upper surface of the base material 5 and protruding from the base material 5; a thermoelectric conversion material 2 disposed on a side surface of the protruding portion 3; and a plurality of electrodes 4 disposed on a surface of the thermoelectric conversion material 2. The protrusion height Z of the protrusion 3 protruding from the base material 5 is larger than a dimension T in a direction orthogonal to a surface direction of a side surface of the protruding portion 3 of a portion disposed on the side surface of the protruding portion 3 of the thermoelectric conversion material 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a thermoelectric conversion device using a thermoelectric conversion material.

  In recent years, efforts for energy problems have become active, and expectations for thermal energy recovery technology are increasing. Thermal energy can be recovered from various scenes such as body temperature, solar heat, engine and industrial exhaust heat, and is the most common energy source. In addition, in order to realize a low-carbon society with high energy efficiency, the need for thermal energy recovery technology is increasing.

  As a heat energy recovery technique, a thermoelectric conversion device based on the Seebeck effect (or Peltier effect) has already been used in various scenes such as temperature difference power generation, a heat sensor, and cooling. The thermoelectric conversion device has, for example, a module structure in which many thermocouples that are combinations of a p-type semiconductor and an n-type semiconductor are connected in series.

  An example of the thermoelectric conversion device as described above is disclosed in Patent Document 1 below. The thermoelectric conversion device described in Patent Literature 1 includes a base material and a thermoelectric conversion element laminated on the base material. The thermoelectric conversion element includes a first electrode, a thermoelectric conversion layer containing an organic material, and a second electrode in this stacking order. The first electrode is laminated in a partial region on the base material. The thermoelectric conversion layer is laminated over the first electrode and the base material. Patent Document 1 describes that the adhesion between the thermoelectric conversion layer and the base material or the first electrode is increased.

Japanese Patent Application Laid-Open No. 2015-072954

  When the thickness of the thermoelectric conversion material is thin, the heat insulating property of the thermoelectric conversion material tends to be low. For this reason, in a thin thermoelectric conversion material, when a high temperature part (heat source) is arranged on one electrode side in the thickness direction and a low temperature part is arranged on the other electrode side, the temperature difference between the electrodes is increased. Is difficult. When the temperature difference between the electrodes cannot be increased, it is difficult to increase the output of the thermoelectric conversion device.

  The objective of this invention is providing the thermoelectric conversion device which can enlarge the temperature difference between electrodes easily and can raise an output.

  According to a wide aspect of the present invention, a base material, a projecting portion disposed on the upper surface of the base material and projecting from the base material, and a thermoelectric conversion disposed on a side surface of the projecting portion. Material and a plurality of electrodes arranged on the surface of the thermoelectric conversion material, and the protrusion height of the protrusion protruding from the base is on the side surface of the protrusion of the thermoelectric conversion material There is provided a thermoelectric conversion device having a size larger than a dimension in a direction orthogonal to a surface direction of a side surface of the protruding portion.

  On the specific situation with the thermoelectric conversion device which concerns on this invention, the thermal conductivity of the said protrusion part is 0.3 W / m * K or less.

  In a specific aspect of the thermoelectric conversion device according to the present invention, the protruding height of the protruding portion protruding from the base material is a portion of the portion disposed on the side surface of the protruding portion of the thermoelectric conversion material, It is twice or more the dimension in the direction orthogonal to the surface direction of the side surface of the protrusion.

  In a specific aspect of the thermoelectric conversion device according to the present invention, the thermoelectric conversion material is layered.

  On the specific situation with the thermoelectric conversion device which concerns on this invention, the said thermoelectric conversion material is arrange | positioned so that it may extend in the surface direction of the upper surface of the said protrusion part above the said protrusion part.

  In a specific aspect of the thermoelectric conversion device according to the present invention, a lower surface of a portion where the electrode is disposed so as to extend in the surface direction of the upper surface of the protrusion above the protrusion in the thermoelectric conversion material. It is arranged on the top or top surface.

  On the specific situation with the thermoelectric conversion device which concerns on this invention, the said thermoelectric conversion material is arrange | positioned so that it may extend in the surface direction of the upper surface of the said base material by the side of the said protrusion part.

  In a specific aspect of the thermoelectric conversion device according to the present invention, a portion of the electrode disposed so as to extend in a surface direction of the upper surface of the base material at a side of the protruding portion in the thermoelectric conversion material, It is arrange | positioned on the lower surface or the upper surface.

  In a specific aspect of the thermoelectric conversion device according to the present invention, a plurality of the thermoelectric conversion materials and the protrusions are provided.

  On the specific situation with the thermoelectric conversion device which concerns on this invention, the side surface of the said protrusion part inclines toward the inner side of the said protrusion part from the lower surface side of the said protrusion part to the upper surface side.

  On the specific situation with the thermoelectric conversion device which concerns on this invention, the said thermoelectric conversion material contains a carbon nanotube.

  The thermoelectric conversion device according to the present invention is a base material, a protrusion that is disposed on the upper surface of the base material and protrudes from the base material, and a thermoelectric conversion material that is disposed on a side surface of the protrusion, A plurality of electrodes disposed on the surface of the thermoelectric conversion material, and the protrusion height of the protrusion protruding from the base material is a protrusion of a portion disposed on the side surface of the protrusion of the thermoelectric conversion material Since it is larger than the dimension in the direction orthogonal to the surface direction of the side surface of the part, the temperature difference between the electrodes can be easily increased, and the output can be increased.

FIG. 1 is a cross-sectional view of a thermoelectric conversion device according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view of a thermoelectric conversion device according to the second embodiment of the present invention. FIG. 3 is a cross-sectional view of a thermoelectric conversion device according to the third embodiment of the present invention. FIG. 4 is a cross-sectional view of a thermoelectric conversion device according to the fourth embodiment of the present invention.

  Hereinafter, the present invention will be described in detail.

  The thermoelectric conversion device according to the present invention is a thermoelectric conversion device that is disposed on a base material, a top surface of the base material, a projecting portion that projects from the base material, and a side surface of the projecting portion. A material and a plurality of electrodes disposed on the surface of the thermoelectric conversion material.

  The protrusion may be integrated with the base material. An interface may exist between the base material and the protrusion, or an interface may not exist. The material of the base material and the material of the protruding portion may be the same or different. The said thermoelectric conversion material should just be arrange | positioned on the at least side surface of the said protrusion part. The thermoelectric conversion material may be disposed on a surface other than the side surface of the protruding portion.

  The protruding height of the protruding portion protruding from the base material is a dimension in a direction perpendicular to the surface direction of the side surface of the protruding portion of the portion arranged on the side surface of the protruding portion of the thermoelectric conversion material. Is also big. Therefore, the dimension of the thermoelectric conversion material along the surface direction of the side surface of the protruding portion can be easily increased, and the distance between the plurality of electrodes can be easily increased. When one electrode of the plurality of electrodes is heated and the other electrode is cooled, the distance through which heat propagates becomes long, so that the temperature difference between the plurality of electrodes can be easily increased. Can do. The output of the thermoelectric conversion device can be effectively increased.

  From the viewpoint of effectively increasing the output of the thermoelectric conversion device, the thermal conductivity of the protrusion is preferably 0.3 W / m · K or less, more preferably 0.1 W / m · K or less, and still more preferably. 0.05 W / m · K or less. When the thermal conductivity of the protruding portion is not more than the upper limit, the protruding portion effectively acts as a heat insulating material, and the insulating property can be effectively enhanced by the protruding portion. From the viewpoint of effectively increasing the output of the thermoelectric conversion device, it is preferable that the thermal conductivity of the protruding portion is lower than the thermal conductivity of the thermoelectric conversion material.

  The dimension in the direction orthogonal to the surface direction of the side surface of the projecting portion of the portion where the projecting height Z of the projecting portion projecting from the base material is disposed on the side surface of the projecting portion of the thermoelectric conversion material Greater than T. That is, the protrusion height Z / dimension T exceeds 1. From the viewpoint of increasing the output of the thermoelectric conversion device more effectively, the protrusion height Z of the protrusion protruding from the base material is disposed on the side surface of the protrusion of the thermoelectric conversion material. The dimension T in the direction perpendicular to the surface direction of the side surface of the protruding portion is preferably 1.1 times or more, more preferably 2 times or more, and further preferably 5 times or more.

  The protruding height of the protruding portion is the maximum distance of the protruding portion connecting the upper surface of the substrate and the upper surface of the protruding portion in a direction orthogonal to the surface direction of the substrate.

  The thermoelectric conversion material may be layered. In this case, the output of the thermoelectric conversion device can be particularly effectively increased. Examples of the layer form include a sheet form and a thin film form formed by printing, vapor deposition, sputtering, or the like. When the thermoelectric conversion material is layered, the dimension in the direction orthogonal to the surface direction of the side surface of the protrusion is preferably the thickness of the thermoelectric conversion material.

  From the viewpoint of increasing the conductivity of the thermoelectric conversion device, the thermoelectric conversion material is preferably disposed so as to extend in the surface direction of the upper surface of the protrusion above the protrusion. In this case, the electrode is disposed on the lower surface or the upper surface of the portion disposed so as to extend in the surface direction of the upper surface of the protruding portion above the protruding portion in the thermoelectric conversion material. It is preferable. In such an arrangement state, the contact area between the electrode and the thermoelectric conversion material can be increased, so that the conductivity can be effectively increased. The electrode may be disposed on a lower surface of a portion of the thermoelectric conversion material that is disposed above the projecting portion so as to extend in a surface direction of the upper surface of the projecting portion, and is disposed on the upper surface. It may be.

  From the viewpoint of increasing the electrical conductivity of the thermoelectric conversion device, the thermoelectric conversion material is preferably disposed on the side of the protrusion so as to extend in the surface direction of the upper surface of the base material. In this case, the electrode is disposed on the lower surface or the upper surface of the portion disposed so as to extend in the surface direction of the upper surface of the base material at the side of the protruding portion in the thermoelectric conversion material. Preferably it is. In such an arrangement state, the contact area between the electrode and the thermoelectric conversion material can be increased, so that the conductivity can be effectively increased. The electrode may be disposed on the lower surface of the portion of the thermoelectric conversion material that is disposed to extend in the surface direction of the upper surface of the base material on the side of the protrusion, and is disposed on the upper surface. May be.

  Note that, on the upper surface of the protruding portion, the upper surface of the base material, or the side surface of the protruding portion, the tip (end surface) of the thermoelectric conversion material in the direction in which the thermoelectric conversion material extends is disposed so as to contact the electrode. May be.

  The thermoelectric conversion device includes a plurality of electrodes. It is preferable to include a first electrode disposed on the surface of the thermoelectric conversion material and a second electrode disposed on the surface of the thermoelectric conversion material at a position away from the first electrode. The structural portion including the first electrode, the thermoelectric conversion material, and the second electrode is a thermoelectric conversion element.

  From the viewpoint of effectively increasing the output of the thermoelectric conversion device, the thermoelectric conversion device preferably includes a plurality of the thermoelectric conversion materials and the protrusions. The thermoelectric conversion device preferably includes a plurality of the thermoelectric conversion elements.

  From the viewpoint of more effectively increasing the output of the thermoelectric conversion device, it is preferable that the side surface of the projecting portion is inclined toward the inner side of the projecting portion from the lower surface side to the upper surface side of the projecting portion. Since the dimension from the lower surface end to the upper surface end of the side surface of the protrusion can be increased, the distance between the electrodes can be increased. Therefore, the temperature difference between the electrodes can be increased, and the output can be increased more effectively. Moreover, the adhesiveness of the said protrusion part and the said thermoelectric conversion material can be improved easily.

  Furthermore, for example, when the thermoelectric conversion material is formed by printing or the like, the thermoelectric conversion material can be easily formed on the inclined side surface of the protruding portion, and the productivity of the thermoelectric conversion device can be increased. it can.

  When the side surface of the protruding portion is inclined as described above, the inclination angle θ of the side surface of the protruding portion is preferably 90 ° or less, more preferably from the viewpoint of further increasing the output of the thermoelectric conversion device. It is 85 ° or less, more preferably 75 ° or less, still more preferably 65 ° or less, still more preferably 55 ° or less, and particularly preferably 45 ° or less. The inclination angle θ of the side surface of the protruding portion may be 120 ° or less, 5 ° or more, 15 ° or more, 25 ° or more, or 35 ° or more. It may be 45 degrees or more. The inclination angle θ is an internal angle of the side surface and the lower surface portion of the protrusion (see FIG. 1).

  If the side surface of the protruding portion is inclined, the distance between the electrodes can be increased to some extent regardless of whether the inclination angle is large or small, so that the output of the thermoelectric conversion device is increased to some extent. be able to.

  The thermoelectric conversion material may contain carbon nanotubes. The thermoelectric conversion material can be obtained, for example, by depositing a dispersion obtained by dispersing the carbon nanotubes in a dispersion medium on a filter paper by a vacuum filtration method or a pressure filtration method, and drying the obtained deposit. When the aspect ratio of the carbon nanotube is large and the concentration of the dispersion liquid is low, the carbon nanotube tends to be parallel to the surface direction when deposited on the filter paper by the above method. In this case, the electric resistance of the thermoelectric conversion material can be effectively reduced, and the output of the thermoelectric conversion device can be effectively increased.

  The thermoelectric conversion material may contain a polymer material. Preferable examples of the polymer material include polystyrene and polyimide. The thermoelectric conversion material may contain a conductive polymer material. Examples of the conductive polymer material include materials obtained by doping polythienin vinylene with iodine.

  In addition, the said thermoelectric conversion material may contain the inorganic material.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view of a thermoelectric conversion device according to the first embodiment of the present invention.

  The drawings referred to in the embodiments are schematically described, and the ratio of the dimensions of the objects drawn in the drawings may be different from the ratio of the dimensions of the actual objects. The specific ratio of the dimensions of the object should be determined in consideration of the following explanation.

  A thermoelectric conversion device 1 shown in FIG. The material of the substrate 5 is a resin material such as polyimide, an appropriate ceramic material, or the like.

  The thermoelectric conversion device 1 includes a protruding portion 3 that is disposed on the upper surface of the base material 5 and protrudes from the base material 5. The thermal conductivity of the protrusion 3 is preferably 0.3 W / m · K or less. Although it does not specifically limit as a material of the protrusion part 3, For example, resin etc. are mentioned.

  The thermoelectric conversion device 1 includes a thermoelectric conversion material 2 arranged on the upper surface of the base material 5, on the side surface of the protruding portion 3, and on the upper surface of the protruding portion 3. The thermoelectric conversion material 2 is disposed in a region where there is no protrusion 3 on the upper surface of the substrate 5. The thermoelectric conversion material 2 is layered. The thermoelectric conversion device 1 includes a plurality of protrusions 3 and thermoelectric conversion materials 2. The thermoelectric conversion device 1 is a unileg type thermoelectric conversion device in which thermoelectric conversion materials 2 that are the same kind of semiconductors are connected in series to each other by an electrode 4 described later. The thermoelectric conversion material 2 may be an n-type semiconductor or a p-type semiconductor.

  The projecting height Z of the projecting portion 3 projecting from the base material 5 is a dimension in a direction perpendicular to the surface direction of the side surface of the projecting portion 3 of the portion disposed on the side surface of the projecting portion 3 of the thermoelectric conversion material 2. Greater than T.

  The thermoelectric conversion device 1 includes a plurality of electrodes 4 arranged on the surface of each thermoelectric conversion material 2. Each electrode 4 connects two thermoelectric conversion materials 2. Each electrode 4 connects two thermoelectric conversion materials 2 arranged side by side, and connects two adjacent thermoelectric conversion materials 2. One end of the electrode 4 in the direction in which the electrode 4 extends is disposed on the upper surface of the portion disposed on the upper surface of the protruding portion 3 in the one thermoelectric conversion material 2. The other end of the electrode 4 in the direction in which the electrode 4 extends is disposed on the upper surface of the portion disposed on the upper surface of the base material 5 in the other thermoelectric conversion material 2. A part of the portion between the one end and the other end of the electrode 4 is disposed on the side surface of the protrusion 3.

  The electrode 4 can be formed by printing etc., for example. In the thermoelectric conversion device 1, since the electrode 4 can be formed in one process, productivity can be improved. The electrode 4 preferably connects adjacent thermoelectric conversion materials 2 to each other. In this case, the electrode 4 can be easily formed.

  FIG. 2 is a cross-sectional view of a thermoelectric conversion device according to the second embodiment of the present invention.

  The thermoelectric conversion device 11 illustrated in FIG. 2 is disposed on the base 5, the protrusion 3 that is disposed on the upper surface of the base 5, and protrudes from the base 5, and on the side surface of the protrusion 3. The thermoelectric conversion material 12 is provided. The thermoelectric conversion material 12 is not disposed on the upper surface of the base material 5 and the upper surface of the protruding portion 3. The thermoelectric conversion device 11 includes a plurality of protrusions 3 and thermoelectric conversion materials 12.

  The thermoelectric conversion device 11 includes a first electrode 14a connected to one end of the thermoelectric conversion material 12 in the direction in which the thermoelectric conversion material 12 extends, and a second electrode connected to the other end of the thermoelectric conversion material 12 in the above direction. Electrode 14b. The thermoelectric conversion device 11 includes a plurality of first and second electrodes 14a and 14b.

  The first electrode 14 a is disposed on the side surface of the protruding portion 3 where the thermoelectric conversion material 12 is not disposed and on the upper surface of the protruding portion 3. The second electrode 14 b is disposed on the upper surface of the base material 5. The first electrode 14a is connected to a second electrode 14b connected to a thermoelectric conversion material 12 different from the thermoelectric conversion material 12 to which the first electrode 14a is connected.

  Note that the first electrode and the second electrode may be connected on the side surface or the upper surface of the protrusion. At this time, the second electrode may be disposed on the side surface of the protrusion, or may be disposed on the upper surface of the protrusion. The first electrode may reach the upper surface of the substrate.

  The thermoelectric conversion material may be disposed on the side surface of the projecting portion, and may be disposed on the side of the projecting portion so as to extend in the surface direction of the upper surface of the second electrode.

  FIG. 3 is a cross-sectional view of a thermoelectric conversion device according to the third embodiment of the present invention.

  The thermoelectric conversion device 21 shown in FIG. 3 includes a base material 5 and a protruding portion 23 that is disposed on the upper surface of the base material 5 and protrudes from the base material 5. The side surface of the protrusion 23 is inclined toward the inside of the protrusion 23 from the lower surface side to the upper surface side of the protrusion 23.

  The thermoelectric conversion device 21 includes a thermoelectric conversion material 22 that is disposed on the upper surface of the substrate 5, on the side surface of the protrusion 23, and on the upper surface of the protrusion 23. The thermoelectric conversion device 21 includes a plurality of protrusions 23 and thermoelectric conversion materials 22.

  The thermoelectric conversion device 21 includes a plurality of electrodes 24 disposed on the surface of each thermoelectric conversion material 22. Each electrode 24 connects two thermoelectric conversion materials 22. The electrode 24 is disposed on the upper surface of the substrate 5, on the side surface of the protruding portion 23, and on the upper surface of the protruding portion 23. One end of the electrode 24 in the direction in which the electrode 24 extends is disposed on the lower surface of the one thermoelectric conversion material 22 on the upper surface of the protrusion 23. The other end of the electrode 24 in the direction in which the electrode 24 extends is disposed on the lower surface of the other thermoelectric conversion material 22 on the substrate 5.

  FIG. 4 is a cross-sectional view of a thermoelectric conversion device according to the fourth embodiment of the present invention.

  The thermoelectric conversion device 31 shown in FIG. 4 includes a first base material 35a and a protrusion 23 that is disposed on the upper surface of the first base material 35a and protrudes from the first base material 35a. . The side surface of the protrusion 23 is inclined toward the inside of the protrusion 23 from the lower surface side to the upper surface side of the protrusion 23.

  The thermoelectric conversion device 31 includes thermoelectric conversion materials 32 a and 32 b disposed on the upper surface of the first base material 35 a, on the side surface of the protruding portion 23, and on the upper surface of the protruding portion 23, respectively. The thermoelectric conversion material 32a is an n-type semiconductor, and the thermoelectric conversion material 32b is a p-type semiconductor. The thermoelectric conversion device 31 includes a plurality of protruding portions 23 and thermoelectric conversion materials 32a and 32b. The thermoelectric conversion device 31 is a π-type thermoelectric conversion device in which a thermoelectric conversion material 32a and a thermoelectric conversion material 32b, which are different types of semiconductors, are connected to each other by first and second electrodes 34a and 34b described later. .

  The protruding height Z of the protruding portion 23 protruding from the first base material 35a is orthogonal to the surface direction of the side surface of the protruding portion 23 of the portion disposed on the side surface of the protruding portion 23 of the thermoelectric conversion material 32a. It is larger than the dimension T1 in the direction. The protrusion height Z is larger than the dimension T2 in the direction perpendicular to the surface direction of the side surface of the protrusion 23 at the portion disposed on the side surface of the protrusion 23 of the thermoelectric conversion material 32b.

  The thermoelectric conversion device 31 includes a first electrode 34a disposed on the upper surface of the projecting portion 23 and a second electrode 34b disposed on the upper surface of the first base material 35a. The first electrode 34 a connects the thermoelectric conversion material 32 a and the thermoelectric conversion material 32 b above the upper surface of the protrusion 23. The second electrode 34b connects the thermoelectric conversion material 32a and the thermoelectric conversion material 32b on the upper surface of the first base material 35a.

  The thermoelectric conversion device 31 includes a second base material 35b disposed on the upper surface of the first electrode 34a. The material of the first and second base materials 35a and 35b is, for example, a resin material such as polyimide, an appropriate ceramic material, or the like. Note that the second base material may not be provided.

DESCRIPTION OF SYMBOLS 1 ... Thermoelectric conversion device 2 ... Thermoelectric conversion material 3 ... Projection part 4 ... Electrode 5 ... Base material 11 ... Thermoelectric conversion device 12 ... Thermoelectric conversion material 14a, 14b ... 1st, 2nd electrode 21 ... Thermoelectric conversion device 22 ... Thermoelectric Conversion material 23 ... Projection 24 ... Electrode 31 ... Thermoelectric conversion device 32a, 32b ... Thermoelectric conversion material 34a, 34b ... First and second electrodes 35a, 35b ... First and second base materials

Claims (11)

A substrate;
A protrusion that is disposed on the upper surface of the substrate and protrudes from the substrate;
A thermoelectric conversion material disposed on a side surface of the protruding portion;
A plurality of electrodes disposed on the surface of the thermoelectric conversion material,
From the dimension in the direction orthogonal to the surface direction of the side surface of the protruding portion of the portion of the thermoelectric conversion material, the protruding height of the protruding portion protruding from the base material is disposed on the side surface of the protruding portion. Also big, thermoelectric conversion device.   The thermoelectric conversion device according to claim 1, wherein the protrusion has a thermal conductivity of 0.3 W / m · K or less.   The protruding height of the protruding portion protruding from the base material is a dimension in a direction perpendicular to the surface direction of the side surface of the protruding portion of the portion disposed on the side surface of the protruding portion of the thermoelectric conversion material. The thermoelectric conversion device according to claim 1 or 2, which is twice or more.   The thermoelectric conversion device according to claim 1, wherein the thermoelectric conversion material is layered.   The thermoelectric conversion device according to any one of claims 1 to 4, wherein the thermoelectric conversion material is disposed so as to extend in a surface direction of an upper surface of the protruding portion above the protruding portion.   The electrode is disposed on a lower surface or an upper surface of a portion disposed so as to extend in a surface direction of the upper surface of the protrusion above the protrusion in the thermoelectric conversion material. The thermoelectric conversion device as described.   The thermoelectric conversion device according to any one of claims 1 to 6, wherein the thermoelectric conversion material is disposed on a side of the protruding portion so as to extend in a surface direction of an upper surface of the base material.   The electrode is disposed on a lower surface or an upper surface of a portion disposed so as to extend in a surface direction of the upper surface of the base material at a side of the protruding portion in the thermoelectric conversion material. The thermoelectric conversion device according to 1.   The thermoelectric conversion device according to any one of claims 1 to 8, comprising a plurality of the thermoelectric conversion materials and the protrusions.   The thermoelectric conversion device according to any one of claims 1 to 9, wherein a side surface of the protruding portion is inclined toward an inner side of the protruding portion from a lower surface side to an upper surface side of the protruding portion.   The thermoelectric conversion device according to claim 1, wherein the thermoelectric conversion material includes carbon nanotubes.

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