WO2005069391A1 - 熱電変換素子とその製造方法、およびこの素子を用いた熱電変換装置 - Google Patents
熱電変換素子とその製造方法、およびこの素子を用いた熱電変換装置 Download PDFInfo
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- WO2005069391A1 WO2005069391A1 PCT/JP2005/000519 JP2005000519W WO2005069391A1 WO 2005069391 A1 WO2005069391 A1 WO 2005069391A1 JP 2005000519 W JP2005000519 W JP 2005000519W WO 2005069391 A1 WO2005069391 A1 WO 2005069391A1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/10—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects
- H10N10/17—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects characterised by the structure or configuration of the cell or thermocouple forming the device
Definitions
- the present invention relates to a thermoelectric conversion element that mutually converts thermal energy and electric energy by the Peltier effect ⁇ Seebeck effect, and further relates to a thermoelectric conversion device using the same.
- thermoelectric conversion element includes a plurality of junctions in which charge carriers alternately connect a positive p-type thermoelectric conversion material and a negative n-type thermoelectric conversion material. Cooling, or an electromotive force is generated by the temperature difference between the joints.
- a thermoelectric conversion element a high-temperature junction and a low-temperature junction must be spatially separated.
- thermoelectric conversion element includes a p-type thermoelectric body 11 and an n-type thermoelectric body 12 made of a sintered body, a melt-solidified body, a single crystal, or the like of a semiconductor or an oxide material. , Which are connected alternately via the internal electrodes 15. Every other one of the internal electrodes 15 is a high-temperature bonding part and a low-temperature bonding part.
- a molded solid such as a sintered body is used as the thermoelectric element, it is difficult to reduce the thickness of the element, and a flexible element cannot be obtained.
- Japanese Patent Laying-Open No. 6-29581 proposes a thermoelectric conversion element using a thin film material.
- a p-type thermoelectric converter 1 formed on one surface of an insulating layer (substrate) 6 and an n-type thermoelectric converter formed on the other surface (rear side in the figure). 2 are connected via an internal electrode 5 embedded in the insulating layer.
- the high-temperature junction and the low-temperature junction are separated from each other not in the film thickness direction but in the in-plane direction as the device becomes thinner.
- thermoelectric conversion element having a similar connection form is also disclosed in Fig. 5 of JP-A-2002-335021. Further, Japanese Patent Application Laid-Open No. 8-195509 discloses an improvement in the structure of a thermoelectric converter for reducing heat loss.
- thermoelectric conversion element shown in FIG. 18 the high-temperature junction and the low-temperature junction need to be spaced apart in the in-plane direction of the element, so the number of junctions that can be arranged per unit area is limited. There was a limit, and it was difficult to achieve high efficiency. Further, at the time of production, it is necessary to form a p-type thermoelectric conversion material film and an n-type thermoelectric conversion material film by patterning them into small pieces. For this reason, the manufacturing process was complicated.
- thermoelectric conversion element shown in Fig. 18 the conventional design (Fig. 17) is applied as it is to the thin film type element, and the (1 p-type thermoelectric conversion unit internal electrode n-type thermoelectric conversion unit internal electrode 1) Unit junctions are arranged to draw one stripe.
- a new design suitable for a thin-film element in which the p-type thermoelectric converter and the n-type thermoelectric converter are arranged so as to draw a stripe crossing each other is adopted.
- the thermoelectric conversion element of the present invention includes an insulating layer, a strip-shaped P-type thermoelectric conversion section disposed on the first surface of the insulating layer, and a second surface of the insulating layer.
- a stripe-shaped n-type thermoelectric conversion section wherein the stripe-shaped P-type thermoelectric conversion section and the stripe-shaped n-type thermoelectric conversion section when viewed along the thickness direction of the insulating layer. It has overlapping parts that intersect.
- the striped p-type thermoelectric converter includes an lp-type thermoelectric converter and a second p-type thermoelectric converter, and the striped n-type thermoelectric converter includes an In-type thermoelectric converter and a second n-type thermoelectric converter. Including parts.
- thermoelectric conversion element of the present invention the following conditions a) to e) are satisfied in the overlapping portion.
- thermoelectric conversion unit and the In-type thermoelectric conversion unit are electrically connected to each other via a first conduction unit disposed in the insulating layer.
- thermoelectric conversion section b) The second p-type thermoelectric conversion section and the second n-type thermoelectric conversion section are electrically connected via a second conduction section disposed in the insulating layer.
- thermoelectric converter and the second p-type thermoelectric converter are adjacent to each other via the overlapping portion and are separated from each other at the overlapping portion.
- thermoelectric conversion section and the 2n-type thermoelectric conversion section are adjacent to each other via the overlapping section, and are separated from each other at the overlapping section.
- thermoelectric conversion device comprising: the thermoelectric conversion element; and a heat conductive member that is in thermal contact with a part of the overlapping portion on the first surface or the second surface.
- thermoelectric conversion element of the present invention a p-type stripe made of a p-type thermoelectric conversion material, an insulating layer, and an n-type stripe made of an n-type thermoelectric conversion material are arranged in this order in a thickness direction, When viewed along the thickness direction of the insulating layer, the p-type stripe and the n-type stripe intersect to form an overlapping portion, and at the overlapping portion, a conductive portion disposed in the insulating layer.
- the second step is a step of dividing the p-type stripe and the n-type stripe so as to satisfy the following condition f) -i) at the overlapping portion.
- thermoelectric converter From the p-type stripe, an lp-type thermoelectric converter and a second p-type thermoelectric converter that are separated from each other are formed.
- thermoelectric converter and the In-type thermoelectric converter are electrically connected to each other through the first conductive portion disposed in the insulating layer.
- thermoelectric conversion unit and the second n-type thermoelectric conversion unit are disposed in the insulating layer and are electrically separated from the first conductive unit by the second conductive unit. Electrically connected
- the p-type thermoelectric converter and the n-type thermoelectric converter are arranged so as to draw a stripe pattern intersecting each other, and two junctions electrically separated from each other are formed in an overlapping portion where the stripe intersects. It was decided to form. As a result, the number of junctions that can be arranged per unit area is increased as compared with the related art, and the efficiency of the thermoelectric conversion element is increased. Further, according to the manufacturing method of the present invention, a thermoelectric conversion element having high efficiency without requiring complicated pattern jungling can be obtained.
- FIG. 1 is a plan view showing one embodiment of the thermoelectric conversion element of the present invention.
- FIG. 2 is a partially enlarged view of FIG. 1.
- FIG. 3 is a plan view showing an example of a usage form of the thermoelectric conversion element shown in FIG. 1.
- FIG. 4 is a diagram illustrating a heat generating portion H (hot spot) and a heat absorbing portion C (cold spot) generated by the usage pattern of FIG.
- FIG. 5 is an exploded perspective view showing one embodiment of the thermoelectric conversion device of the present invention.
- FIG. 6 is a cross-sectional view of the thermoelectric converter of FIG.
- FIG. 7 is a plan view showing an example of an insulating layer used in the manufacturing method of the present invention.
- thermoelectric conversion element 8 is a cross-sectional view for illustrating a manufacturing process of the thermoelectric conversion element using the insulating layer shown in FIG.
- FIG. 9 is a plan view illustrating a step performed following the step shown in FIG. 8 by bow I.
- FIG. 10 is a plan view illustrating another step of the manufacturing method according to the present invention.
- FIG. 11 is a cross-sectional view illustrating one step of a manufacturing method using a growth substrate.
- FIG. 12 is a cross-sectional view illustrating a step performed after the step shown in FIG. 11.
- FIG. 13 is a sectional view showing an insulating layer with a film obtained by the step shown in FIG. 12.
- FIG. 14 is a view showing a thermoelectric conversion element manufactured in Example 1, (a) is a plan view of an insulating layer, (b) is a plan view showing a p-type stripe pattern, and (c) (A) is a plan view showing a pattern of an n-type stripe, and (d) is a plan view showing a dividing line by a laser beam.
- thermoelectric conversion element (E) is a plan view showing a usage pattern of the obtained thermoelectric conversion element.
- FIG. 15 is a view showing a thermoelectric conversion element manufactured in Example 2, (a) is a plan view of an insulating layer, (b) is a plan view showing a p-type stripe pattern, and (c) FIG. 4 is a plan view showing a pattern of an n-type stripe, and FIG. 4 (d) is a plan view showing a dividing line by a laser beam.
- FIG. 16 is a perspective view showing a thermoelectric conversion device manufactured in Example 2.
- FIG. 17 is a cross-sectional view showing a conventional thermoelectric conversion element.
- FIG. 18 is a plan view showing a conventional thin-film thermoelectric conversion element.
- FIG. 1 shows one embodiment of the thermoelectric conversion element of the present invention.
- the insulation The p-type thermoelectric converters 31, 32 are arranged so as to draw a stripe pattern on the surface (first surface) of the layer (substrate) 20, and a stripe pattern is drawn on the back surface (second surface) of the insulating layer 20.
- the n-type thermoelectric converters 41, 42 are arranged. Stripes (p-type thermoelectric converters) 21 consisting of p-type thermoelectric converters 31 and 32, and stripes (stripe P-type thermoelectric converters) consisting of n-type thermoelectric converters 41, 42
- the conversion section 22 intersects with each other to form an overlapping section 25.
- an electrode (internal electrode) 23 serving as a conductive portion in the insulating layer is arranged.
- the stripe 21 composed of the p-type thermoelectric converters 31 and 32 and the stripe 22 composed of the n-type thermoelectric converters 41 and 42 are both drawn as a straight line, in other words, a straight line. It is arranged as a stripe.
- the internal electrode 23 is divided into two by a dividing line 24.
- the dividing line 24 also divides the stripe 21 (22) composed of a p-type (n-type) thermoelectric converter.
- the stripe pattern composed of the p-type (n-type) thermoelectric conversion units is constituted by the stripes 21 (22) divided at the overlapping part 25, which is not a continuous stripe.
- the internal electrode 23 is connected to the first internal electrode (first conductive portion) 51 and the second internal electrode (second conductive portion) 52 by one dividing line 24.
- the striped p-type thermoelectric converter 21 is split into an lp-type thermoelectric converter 31 and a second p-type thermoelectric converter 32, and the striped n-type thermoelectric converter 22 is converted into an In-type thermoelectric converter. It is divided into a part 41 and a second n-type thermoelectric conversion part.
- the first internal electrode (first conduction section) 51 electrically connects the lp-type thermoelectric conversion section 31 and the In-type thermoelectric conversion section 41
- the second internal electrode (second conduction section) 52 includes The second p-type thermoelectric converter 32 and the second n-type thermoelectric converter 42 are electrically connected, and the two internal electrodes 51 and 52 are electrically separated from each other. Thus, two electrical junctions are formed in the overlapping portion 25 of the thermoelectric conversion element 30.
- the force conducting portion showing the internal electrode 23 as a conducting portion is formed by contact between the P-type thermoelectric conversion portions 31, 32 and the n-type thermoelectric conversion portions 41, 42 in the insulating layer 20.
- the insulating layer 20 has an internal electrode 23 or a through hole, preferably an internal electrode 23 therein.
- the breaking lines 24 are usually holes formed by laser processing described later. These holes may be filled with an insulating material.
- FIG. 3 shows an example of usage of the thermoelectric conversion element 30.
- a current flows from the p-type thermoelectric conversion portion to the n-type thermoelectric conversion portion, or vice versa.
- DC current 40 is supplied from an external power supply (not shown).
- the two electrical junctions existing in one overlapping portion are both heat generating portions or heat absorbing portions.
- heat generating portions (H) 26 and heat absorbing portions (C) 27 appear every other length and width in the thermoelectric conversion element 30. If the direction of the current 40 is reversed, the heat generating part 26 and the heat absorbing part 27 are switched. In each of the heat generating portion 26 and the heat absorbing portion 27, heat is generated or absorbed from two pn junctions. For this reason, it is possible to obtain twice the efficiency of the conventional thin film device (see Fig. 18). According to the present invention, a region that does not contribute to element operation can be reduced or reduced as compared with the related art.
- a first heat conducting member that is in contact with the heat generating portion 26 is arranged on one surface, and is in contact with the heat absorbing portion 27. What is necessary is just to arrange
- the heat conducting member should be arranged so as to be in contact with one of the heat generating part 26 and the heat absorbing part 27 but not with the other. For example, the contact between the heat radiating member and the thermoelectric conversion element 30 may be performed along the line 28, and the contact between the heat absorbing member and the thermoelectric conversion element 30 may be performed along the line 29.
- thermoelectric conversion element 30 shown in Fig. 1 to Fig. 4 the two or more overlapping portions 25 flow the DC current 40 through the striped p-type thermoelectric conversion portion 21 and the striped n-type thermoelectric conversion portion 22.
- the overlapping portion 26 serving as a heat-generating portion and the overlapping portion 27 serving as a heat-absorbing portion are formed. 28, 29 are arranged on. Therefore, it is easy to make contact between the overlapping portion having the same kind of thermal characteristics and the heat conducting member.
- FIGS. 5 and 6 show one embodiment of a thermoelectric converter in which a heat conducting member (heat bath fin) is arranged.
- a heat conducting member heat bath fin
- the protrusion of the heat radiating member 33 is disposed along the line 28 and contacts only the heat generating portion 26
- the protrusion of the heat absorbing member 34 is disposed along the line 29 and contacts only the heat absorbing portion 27.
- the plate-shaped projections protruding from the two heat conducting members 33 and 34 are arranged in parallel with each other. They may be arranged to intersect.
- thermoelectric converter 50 When electricity is supplied to the thermoelectric converter 50, heat can be absorbed from the heat absorbing member 34. Heat is released from the heat release member 33.
- the thermoelectric converter 50 can be used as a thermoelectric generator when a temperature difference is given between the two heat conducting members 33 and 34.
- the thermoelectric conversion device of the present invention may include the first heat conductive member 33 contacting the first surface and the second heat conductive member 34 contacting the second surface as heat conductive members. Specifically, on the first surface of the thermoelectric conversion element 30, the first heat conductive member 33 that thermally contacts a part (the heat generating portion 26) selected from the overlapping portion 25, and the overlapping portion 25 on the second surface. A device having a second heat conducting member 34 that is in thermal contact with at least a selected portion (heat absorbing portion 27) other than a portion (heat generating portion 26).
- thermalally contact refers to a contact form capable of conducting heat, and is not limited to a form in which physical contact is made directly.
- a material having excellent heat conductivity for example, an electrically insulating material such as sapphire, alumina, aluminum nitride, diamond, boron nitride, or silicon carbide is suitable.
- an electrically insulating material such as sapphire, alumina, aluminum nitride, diamond, boron nitride, or silicon carbide is suitable.
- a part thereof may include a conductive material such as a metal material or a carbon material.
- an insulating layer (base) 20 in which an internal electrode 23 is embedded in advance as a conductive portion is prepared.
- the internal electrode 23 penetrates the insulating layer 20 and ensures conduction on both surfaces of the layer 20.
- the internal electrodes 23 are arranged at predetermined intervals in the vertical and horizontal directions of the insulating layer 20, but the arrangement is not limited to this.
- a through-hole may be formed as a conductive portion in the insulating layer.
- a p-type (n-type) thermoelectric conversion material film enters the through hole, and a pn junction is formed in the through hole.
- the conductive portion is the internal electrode 23 or the contact between the p-type thermoelectric conversion portion and the n-type thermoelectric conversion portion in the insulating layer 20, preferably the internal electrode 23.
- the insulating layer 20 needs to have electrical insulation properties, but preferably has excellent thermal insulation properties. Specifically, resin, ceramitas, plywood, paper board, or the like may be used. It is preferable that the insulating layer 20 has flexibility, and from this viewpoint, an insulating layer made of resin is more preferable.
- a flexible insulating layer is used, a flexible thermoelectric conversion element can be obtained.
- a flexible heat conducting member is used in combination, a flexible thermoelectric conversion device can be obtained.
- the flexible thermoelectric conversion device enables, for example, body temperature power generation by clothing.
- thermoelectric conversion material film 43 is formed on one surface of the insulating layer 20, and an n-type thermoelectric conversion material film 44 is formed on the other surface.
- Preferred thermoelectric materials! / Examples include semiconductor materials such as Bi-Te, Pb-Te, and Si-Ge, and oxide materials such as NaCoO.
- the film forming method There is no particular limitation on the film forming method, and a plating method, a coating / decomposing method, a sol-gel method, a vapor deposition method, a sputtering method, and the like may be appropriately selected according to the type of the material.
- thermoelectric conversion material film 43 is divided so as to draw a stripe pattern to form a continuous stripe (P-type stripe) 45 composed of P-type thermoelectric conversion portions.
- the n-type thermoelectric conversion material film 44 is divided so as to draw a stripe pattern to form a continuous stripe (n-type stripe) 46 composed of n-type thermoelectric conversion portions.
- thermoelectric conversion material films 43 and 44 are divided so that a p-type stripe 45 and an n-type stripe 46 intersect with each other in a region where the internal electrode 23 is arranged to form an overlapping portion 25.
- the film may be divided by, for example, mechanical cutting, etching, or laser processing. In this embodiment, since the p-type and n-type stripes 45 and 46 are both linear stripes, the film can be divided very easily.
- thermoelectric conversion element shown in FIG. 1 is obtained. As described above, this division is performed so that two electrically joined portions electrically separated from each other are formed in the overlapping portion. By this division, the current path in the thermoelectric conversion element is determined, and the p-type stripe 45 and the n-type stripe 46 become the stripes 21 and 22 which are divided on the way.
- the division performed in this step can be easily performed by using a laser beam.
- the conductive part (internal electrode) 23 to the first conductive part (first internal electrode) 51 and the second conductive part (second internal) It is necessary to divide the conductive portion 23 together with the P-type stripe 45 and the n-type stripe 46 so that the electrode 52 is formed.
- the first conductive portion and the second conductive portion are previously arranged in the insulating layer as the conductive portion as in the embodiment described later, that is, two previously separated conductive portions are arranged. In this case, it is not necessary to cut off the conductive portion together with the p-type and n-type stripes.
- thermoelectric conversion material film 43 the p-type thermoelectric conversion material film 43 and the n-type thermoelectric conversion material film 44 and then dividing these films has been described.
- the p-type thermoelectric conversion material film 43, the insulating layer 20, and the n-type thermoelectric conversion material film 44 are arranged in this order in the thickness direction, and the p-type thermoelectric conversion film is formed through the conductive portion 23 disposed in the insulating layer 20.
- one film for example, p-type
- this film is divided to form one stripe (p-type stripe 45).
- the p-type stripe 45 and the n-type stripe 46 may be directly formed by film formation using a mask that does not divide the film.
- the method of forming the films 43 and 44 and the stripes 45 and 46 is not limited to various vapor deposition methods, but may be a method in which a molten material or a material dissolved in a solvent is applied and solidified or dried. It is OK to adhere.
- thermoelectric conversion material film 43 and the n-type thermoelectric conversion material film 44 are formed and then the films 43 and 44 are divided, the p-type stripe 45 and the n-type stripe 46 are directly formed. Nevertheless, in the present invention, it is not necessary to form a complex film with complicated division and complicated masking.
- an insulating layer preferable for use is not always a substrate suitable for growing a film having good crystallinity.
- a substrate having flexibility and excellent thermal insulation for example, a resin layer, is generally inferior in heat resistance, and thus is suitable for forming a thermoelectric conversion material film having excellent crystallinity! ⁇ .
- the production method of the present invention provides a p-type thermoelectric conversion material in which at least one selected from a p-type stripe and an n-type stripe is grown on a substrate (growth substrate). Moving the film or the n-type thermoelectric conversion material film from the growth substrate onto the insulating layer (substrate to be used), and dividing and obtaining the p-type or n-type thermoelectric conversion material film. Will be.
- This manufacturing method includes the above steps a to c.
- the p-type thermoelectric conversion material film or the n-type thermoelectric conversion material film grown on the growth substrate is placed on the insulating layer (substrate) from the growth substrate. It is preferable to carry out the method as a step of moving to
- a p-type unit 93 in which a base film 85 is formed on a growth base 87 and further a p-type thermoelectric conversion material film 83 is formed, and a base film 86 is formed on the growth base 88 And an n-type unit 94 on which an n-type thermoelectric conversion material film 84 is further formed.
- the p-type cut 93 and the n-type unit 94 hold the insulating layer (substrate used) 80 in which the internal electrode 82 is embedded in advance so that the thermoelectric conversion material films 83 and 84 are in contact with the insulating layer 80.
- the material of the growth substrates 87 and 88 is not particularly limited as long as the film can be grown with good crystallinity, but inorganic crystals such as sapphire, garnet, and magnesium oxide are preferable.
- the insulating layer 80 and the thermoelectric conversion material films 83, 84 are separated from the growth bases 87, 88.
- the base films 85 and 86 may be dissolved using an appropriate solvent.
- the growth substrates 87 and 88 may be removed instead of being separated.
- the removal of the growth substrates 87 and 88 is performed, for example, by irradiating the back surface of the growth substrates with laser light, or by dissolving the growth substrates 87, 88 using a solvent capable of dissolving the growth substrates 87, 88, for example. be able to.
- the insulating layer 80 is sandwiched between the p-type unit 93 and the n-type unit 94, and the oxide film containing the alkali metal element is removed. It is preferable to expose the base films 85 and 86 made of copper to water vapor to cause water molecules 89 to enter the base films 85 and 86.
- the base film which is an oxide layer containing an alkali element, is formed on the growth substrate, and a p-type thermoelectric conversion material film or an n-type thermoelectric conversion material film is grown on the base film.
- thermoelectric conversion material films 83, 84 With less damage can be obtained (Fig. 13).
- water vapor is supplied to a unit including a base film disposed in a closed chamber. It is preferable to supply water vapor to a supply source, for example, water in the chamber 1 or the undercoat film.
- the oxidized product containing an alkali metal element particularly has a composition represented by A CoO.
- A is at least one alkali metal element
- M is at least one element selected from Co, Fe, Ni, Mn, Ti, Cr, V, Nb and Mo
- x is in the range of 0 ⁇ ⁇ 1 Is the numerical value of
- the range of X is the same in the compounds shown in the examples.
- thermoelectric conversion material film on a substrate of an element that is not essential to the production method of the present invention.
- a metal or alloy such as bismuth, antimony, lead, tin, or tellurium, which is easily deposited, as the thermoelectric conversion material.
- a stripe having a p-type thermoelectric converter power and a stripe having an n-type thermoelectric converter power are bent.
- This configuration is advantageous for thermally connecting the heat generating portion and the heat absorbing portion while securing the distance between the heat generating portion and the heat absorbing portion.
- the overlapping portion closest to the predetermined overlapping portion is the overlapping portion having the opposite thermal characteristic (the inverse characteristic overlapping portion).
- the predetermined overlapping portion may have an overlapping portion having the same thermal characteristic at a position closer to the inverse characteristic overlapping portion. A configuration in which overlapping portions having the same thermal characteristics are arranged close to each other is advantageous in reducing heat loss.
- the p-type stripe and the n-type stripe force may be formed as a bent stripe. At least one of the stripes formed of the portions may be bent.
- the “bent stripe” includes a stripe that is bent only in a part thereof.
- the predetermined overlapping portion 25 is formed by the lp-type thermoelectric converter 31, the second p-type thermoelectric converter 32, the In-type thermoelectric converter 41 or It is preferable to have an overlapping portion located closer to the overlapping portion than the adjacent overlapping portion via the second n-type thermoelectric conversion portion.
- thermoelectric conversion elements are arranged such that the distance between the portions is larger than the distance between the overlapping portion serving as the heat generating portion and the overlapping portion serving as the heat absorbing portion.
- thermoelectric conversion material Ca CoO the crystalline p-type thermoelectric conversion material Ca CoO and the n-type thermoelectric conversion material La
- NiO was used.
- a film is formed to a thickness of 50 nm, and a Ca CoO film or LaNiO film is
- Each film was formed at a growth temperature of 700 ° C. by a sputtering method using respective sintering targets.
- the growth atmosphere was adjusted to 1 Pa with 10% oxygen mixed argon gas, and the sputter discharge power was set to 80 W. Under these growth conditions, it has been confirmed by X-ray diffraction that each oxide film grows epitaxially with the same crystal orientation. Under these conditions, the c-axis of the underlayer Na CoO is oriented vertically on the sapphire c-plane.
- thermoelectric conversion material films formed on both surfaces of the resin substrate was obtained.
- the NaCoO film itself can be used as the thermoelectric conversion material.
- the thermoelectric conversion material itself can be used as the thermoelectric conversion material.
- thermoelectric conversion material film By using a substrate made of a material capable of growing an anilide containing an alkali metal element such as 2 with good crystallinity. The same manufacturing method as described above can be implemented. Similar results can be obtained by peeling the thermoelectric conversion material film and then bonding the thermoelectric conversion material film to a resin substrate or the like.
- FIG. 14A is a plan view of a resin base 62 in which a metal electrode 61 is embedded.
- the metal electrode 61 divided into two in advance is embedded.
- the metal electrode 61 may be divided in advance instead of being divided together with the stripe having the thermoelectric conversion material force.
- thermoelectric conversion material films are formed on both surfaces of the resin substrate 62, these films are divided by laser processing to form p-type stripes 71 and n-type stripes 72. Obtained.
- the patterns of these stripes are shown in FIGS. 14 (b) and (c), respectively.
- the width of the stripes 71 and 72 was 5 mm, and the interval was 0.5 mm.
- the p-type and n-type stripes 71 and 72 were formed so as to intersect each other in the region where the internal electrodes were embedded.
- thermoelectric conversion element When an external DC power supply was connected to the obtained thermoelectric conversion element and a current of 1 mA was supplied, a temperature difference of 20 ° C. occurred between the high-temperature junction and the low-temperature junction (FIG. 14). (e)).
- thermoelectric conversion element the high-temperature junction and the low-temperature junction are arranged in a line so that the same type of junction can be easily thermally connected.
- the distance between adjacent joints of the same type is designed to be shorter than the distance between adjacent different types of joints.
- thermoelectric conversion material film formed by a solution coating method was used in order to manufacture a thermoelectric conversion element having a relatively large area.
- the 349 film was coated and dried with an aluminum-added ZnO film as an n-type thermoelectric conversion material film. By turning it over, it grew to a thickness of 5000 nm. Subsequently, the Ca Co O film was heated at 850 ° C.
- thermoelectric conversion element was manufactured in the same manner as in Example 1.
- a resin base 61 having pre-divided internal electrodes 62 was used as shown in FIG.
- Formed stripes 71 and n-type stripes 72 were formed, and the p-type and n-type stripes 71 and 72 were divided along the dividing lines 73 as shown in FIG. According to this pattern, the extension directions of the P-type stripe 71 and the n-type stripe 72 on both surfaces of the base 61 are uniform, so that it is easy to define the pattern.
- thermoelectric conversion element 81 Using the thermoelectric conversion element 81, a thermoelectric conversion device shown in FIG. 16 was produced.
- a heat pipe 91 is arranged so as to be in thermal contact with one of the joint rows of the thermoelectric conversion element 81.
- the flue gas is supplied to the heat pipe in the direction indicated by the arrow and maintained at about 200 ° C, while the other joint row is air-cooled with a fan and the temperature difference between the joint rows is maintained at 150 ° C did.
- an electromotive force of 5 V was obtained.
- thermoelectric conversion element that has high efficiency even if it is made thin.
- INDUSTRIAL APPLICABILITY The present invention is extremely useful as a thin and flexible high-performance electronic cooler, for example, a thermoelectric generator capable of supplying a universal power using body temperature. According to the present invention, a thin thermoelectric conversion element can be efficiently manufactured.
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CN2005800006454A CN1820380B (zh) | 2004-01-19 | 2005-01-18 | 热电转换元件及其制造方法和使用该元件的热电转换装置 |
JP2005517098A JP3828924B2 (ja) | 2004-01-19 | 2005-01-18 | 熱電変換素子とその製造方法、およびこの素子を用いた熱電変換装置 |
US11/194,698 US7317159B2 (en) | 2004-01-19 | 2005-08-02 | Thermoelectric conversion element and method of manufacturing the same, and thermoelectric conversion device using the element |
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US11/194,698 Continuation-In-Part US7317159B2 (en) | 2004-01-19 | 2005-08-02 | Thermoelectric conversion element and method of manufacturing the same, and thermoelectric conversion device using the element |
US11/194,698 Continuation US7317159B2 (en) | 2004-01-19 | 2005-08-02 | Thermoelectric conversion element and method of manufacturing the same, and thermoelectric conversion device using the element |
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Cited By (4)
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2006111522A (ja) * | 2004-09-16 | 2006-04-27 | Tokyo Univ Of Science | 熱電変換材料の製造方法 |
JP2009158760A (ja) * | 2007-12-27 | 2009-07-16 | Daikin Ind Ltd | 熱電素子 |
JP2016018867A (ja) * | 2014-07-08 | 2016-02-01 | 株式会社Kri | フレキシブル熱電変換デバイス |
JP2017063141A (ja) * | 2015-09-25 | 2017-03-30 | Tdk株式会社 | 薄膜熱電素子 |
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JP3828924B2 (ja) | 2006-10-04 |
CN1820380B (zh) | 2010-05-05 |
JPWO2005069391A1 (ja) | 2007-12-27 |
US20060107990A1 (en) | 2006-05-25 |
US7317159B2 (en) | 2008-01-08 |
CN1820380A (zh) | 2006-08-16 |
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