WO2005041312A1 - 受光又は発光モジュールシート及びその製造方法 - Google Patents
受光又は発光モジュールシート及びその製造方法 Download PDFInfo
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- WO2005041312A1 WO2005041312A1 PCT/JP2003/013666 JP0313666W WO2005041312A1 WO 2005041312 A1 WO2005041312 A1 WO 2005041312A1 JP 0313666 W JP0313666 W JP 0313666W WO 2005041312 A1 WO2005041312 A1 WO 2005041312A1
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- Prior art keywords
- light
- solar cell
- spherical
- light receiving
- module sheet
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Classifications
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Definitions
- the present invention relates to a light receiving or light emitting module sheet and a method for manufacturing the same, and in particular, a conductive wire electrically connected to a spherical element and an insulating tension wire for fixing the conductive wire are woven in a mesh shape.
- the present invention relates to a light receiving or light emitting module sheet. Background art
- a high-purity metal silicon raw material is melted and dripped to produce a granular p-type crystal, and n-type impurities are diffused into the p-type crystal to form a spherical pn junction.
- a solar cell module in which the solar cell elements are connected by an aluminum foil is disclosed in US Pat. No. 4,581,110.
- an independent electrode is not formed before the spherical solar cell element is modularized, but the solar cell element is mechanically installed in a hole formed in one aluminum foil.
- the p-type silicon, which is the core, is removed by etching or the like to remove part of the surface of the n-type layer of the solar cell element protruding downward from the hole.
- a positive electrode is formed by exposing this p-type silicon to the surface of another aluminum foil.
- a plurality of solar cell elements are formed with electrodes and thickened by two aluminum foils.
- the positive cell elements are connected in parallel to be modularized.
- This configuration of solar cell module has the advantage that two aluminum foils can be used to form a junction electrode and connect them in parallel, but the n-type layer and aluminum foil are connected and the p-opening region is exposed. Therefore, it is difficult to judge the characteristics and quality of individual solar cell elements. Also, since this configuration is limited to parallel connection, it must be connected to another solar cell module to increase the output voltage.
- the distance between the two aluminum foils becomes shorter, making it difficult to insulate the aluminum foils from each other, and the manufacturing process becomes complicated.
- the position of the positive and negative electrodes is below the center of the solar cell element, that is, both electrodes are formed at asymmetric positions, so the current flowing between the positive and negative electrodes is biased to a short electrode distance, and the photoelectric conversion efficiency
- the light is blocked by the aluminum foil, and the light receiving surface is limited above the aluminum foil. There is a disadvantage that it cannot be improved.
- Japanese Laid-Open Patent Publication No. 9 _ 1 6 2 4 3 4 discloses a plurality of spherical shapes made of glass fiber cloth formed by weaving linear conductor wires extending vertically and glass fibers extending horizontally.
- a sheet-like solar cell in which a solar cell element is supported is disclosed. In this solar cell, the insulation between the conductor wires is simplified by supporting the solar cell elements with the conductor wires.
- the positive conductor wire connected to the p-type region is also connected to the n-type layer, the positive conductor wire is made p-type by electrochemically etching and pn junction separation while irradiating light. Although only the region is connected, it is difficult to reliably perform pn junction separation in all the solar cell elements because the etching progress speed is different in each solar cell element. Also in the solar cell element of this publication, since it is connected to the positive electrode conductor and the negative electrode conductor at positions asymmetric with respect to the center, the same problem as that of the above-mentioned cited reference occurs.
- the problem is that force light emission does not occur only in a narrow region between the conductor wires, so that light cannot be emitted in all directions, and the spherical There is a problem that the advantage of the light emitting diode is lost.
- spherical elements which are solar cell elements or light emitting devices, and a light receiving or light emitting module in which the spherical elements are connected.
- a sheet is proposed.
- This spherical element consists of a spherical p-type (or n-type) single crystal semiconductor (such as silicon), an n-type (or p-type) diffusion layer formed near the surface of the single crystal semiconductor, and a substantially spherical surface. Pn junction and a pair of positive and negative electrodes provided at opposite positions across the center of a spherical single crystal semiconductor.
- These many spherical elements are arranged in a matrix of multiple rows and multiple columns, and these are connected in series or in parallel to constitute a light receiving or light emitting module sheet.
- spherical elements are provided with electrodes facing each other across the center thereof, a plurality of spherical elements can be arranged by arranging the positive and negative electrodes of adjacent spherical elements in direct contact with each other. It is easy to connect the elements in series, but it is not easy to connect the spherical elements in parallel.
- the applicant of the present application arranges the electrodes so that the directions of the electrodes are aligned by two conductive wires arranged in parallel in International Publication WOO 3/0 1 7 3 8 2.
- a spherical element array is formed by connecting in parallel so as to sandwich the positive and negative electrodes of the installed spherical element, and the spherical element arrays are connected in series by connecting the conductive wires of adjacent spherical element arrays. .
- An object of the present invention is to provide a light-receiving or light-emitting module sheet that can be composed of only good spherical elements, and to provide a light-receiving or light-emitting module sheet that is strong in tensile strength. It is to provide a light receiving or light emitting module sheet with high efficiency of photoelectric conversion or electro-optical conversion by a spherical element, and to provide a light receiving or light emitting module sheet that is easy to manufacture.
- the light-receiving or light-emitting module sheet according to the present invention is a plurality of spherical elements having a light-receiving or light-emitting function, each connected to both ends of a substantially spherical pn junction and p ⁇ junction, and positioned at both ends of the spherical element.
- the wire In order to fix the wire, it has a plurality of conductive wires and a plurality of insulating tension wires woven in a mesh.
- this light receiving module sheet In the case of this light receiving module sheet, light is incident on the light receiving module sheet regardless of the incident direction of light, and when this light is irradiated to a plurality of spherical elements arranged in a matrix with the same polarity, the spherical element Light is received by the substantially spherical ⁇ ⁇ junction formed in, and converted into electrical energy by the light receiving function of the spherical element. The electrical energy is output to the outside through the positive and negative conductive wire connection portions connected to both ends of the ⁇ ⁇ junction and positioned at both ends of the spherical element.
- the electrical energy supplied from the conductive wire to the spherical element through the conductive wire connecting portion is converted into light energy by the ⁇ ⁇ junction of the spherical element, and this light is emitted to the outside.
- the spherical element Since the spherical element has positive and negative conductive wire connections connected to both poles of the ⁇ -junction, it is possible to inspect the spherical element before threading the spherical element into the light receiving or light emitting module sheet. Only good quality spherical elements can be incorporated into the light receiving or light emitting module sheet, and high quality products can be manufactured stably.
- the positive and negative conductive wire connection portions on the spherical element before assembly the connection between the conductive wire connection portions and the conductive wires is simplified, and the manufacturing process is simplified.
- the strength is excellent. Since the positive and negative conductive connections of the spherical element are connected to a substantially spherical pn junction and at both ends of the spherical element, the entire area of the pn junction is effectively used to increase the efficiency of power and light generation. Can do.
- the positive and negative conductive wire connecting portions are located opposite to each other across the center of the spherical element.
- a transparent synthetic resin or transparent glass sealing member is provided that accommodates the plurality of spherical elements together with a plurality of conductive wires and a plurality of tension wires.
- Each of the spherical elements is a photodiode element or a solar cell element.
- Each of the spherical elements is a light emitting diode element.
- the conductive wire is one that is selected from solder, conductive synthetic resin, and alloyed metal, and is connected to the positive and negative conductive wire connecting portions.
- the conductive wire is embedded in the seal member so that at least a part of the conductive wire is exposed.
- An insulating tension wire woven into conductive wires parallel to the conductive wires is provided between the rows of the spherical elements.
- the seal member is configured as a flexible member using a transparent synthetic resin material.
- a reflective film that reflects light incident from the incident side is formed on the surface of the seal member opposite to the light incident side.
- the sealing member includes a flexible transparent cushion layer that accommodates a plurality of spherical elements in an embedded state, and a transparent surface layer bonded to both surfaces of the cushion layer.
- the sealing member has a heat reflecting film made of a polymer material that selectively reflects heat rays that cannot be absorbed by the spherical element.
- the light receiving or light emitting module sheet manufacturing method includes a plurality of spherical elements having a light receiving or light emitting function arranged in a matrix, and a conductive wire electrically connecting the plurality of spherical elements in each row in parallel.
- a spherical element having positive and negative conductive wire connecting portions is manufactured in a method of manufacturing a light receiving or light emitting module sheet comprising a conductive wire and an insulating tension wire woven in a mesh shape to fix the conductive wire.
- this light receiving or light emitting module sheet manufacturing method first, a plurality of spherical elements having positive and negative conductive wire connecting portions are manufactured in the spherical element manufacturing process, and then melted by a current flowing through the conductive lines in the connecting process.
- the plurality of spherical elements arranged in a matrix and the conductive wires are connected in parallel by the joining members.
- the spherical element is a non-defective product or a defective product through this conductive wire connecting portion, and it is possible to prevent the defective spherical device from being incorporated into the light receiving or light emitting module sheet.
- the positive and negative conductive wire connecting portions in the spherical element before assembly, the connection between the conductive wire connecting portions and the conductive wires is surely and easily made, and the manufacturing process is simplified.
- the joining member is melted by the current flowing through the conductive wire, and the conductive wire and the spherical element are connected, so that the thermal efficiency is high and the connection can be easily made, and the energy saving and the manufacturing process are simplified.
- FIG. 1 is a plan view of a light receiving module sheet according to an embodiment of the present invention
- FIG. 2 is a partially enlarged plan view of the light receiving module sheet
- FIG. 3 is an enlarged sectional view of a solar cell element
- FIG. Fig. 5 is an arrow view seen from arrow IV in Fig. 2
- Fig. 5 is an arrow view seen from arrow V in Fig. 2
- Fig. 6 is a sectional view taken along line VI-VI in Fig. 2
- Fig. 7 is a light receiving module.
- 8 is an equivalent circuit diagram of the solar cell module included in the sheet
- FIG. 8 is a diagram showing the solar cell element at each stage of manufacturing the solar cell element
- FIG. 9 is a diagram showing a positioning jig for positioning the solar cell element and the conductive wire. It is explanatory drawing explaining the process of electrically connecting using, Fig. 10 is a partially enlarged plan view of the light receiving module sheet according to the modified embodiment, Fig. 11 is a longitudinal sectional view of the main part of the light receiving module sheet incorporating the sealing member according to the modified embodiment, and Fig. 12 is a modified view.
- FIG. 13 is a longitudinal sectional view of a main part of a light receiving module sheet in which a seal member according to a form is incorporated, and FIG. 13 is a partially enlarged plan view of a light receiving module sheet according to a modified form.
- This embodiment is an example in which the present invention is applied to a light receiving module sheet (solar cell module sheet) in which spherical solar cell elements are arranged in a matrix of multiple rows and multiple columns.
- a light receiving module sheet solar cell module sheet
- spherical solar cell elements are arranged in a matrix of multiple rows and multiple columns.
- the light receiving module sheet 1 is composed of a large number of solar cell elements 2 (corresponding to spherical elements), a mesh member 3 (conductive wire mixed glass cloth), and a seal member. 4 etc.
- many solar cell elements 2 have a light-receiving function that converts light energy into electrical energy, and are arranged in a matrix with the same polarity. For example, about 200 solar cell elements 2 are used per 1 watt of power generation output.
- each solar cell element 2 has a spherical crystal 10 made of p-type silicon single crystal having a resistivity of about 0.3 to 1 ⁇ m and a diameter of about 0.6 to 2.0 mm. It is formed as a material.
- a flat surface 11 is formed at one end of the spherical crystal 10.
- An n + -type diffusion layer 12 (having a thickness of about 0.4 to 0.0) in which phosphorus (P) is diffused over substantially the entire surface of the spherical crystal 10 excluding the flat surface 11 is formed.
- a substantially spherical pn junction 13 is formed at the interface between the n + -type diffusion layer 1 2 and the p-type region 1.
- the flat surface 1 1 The diameter is about 0.5 mm It is formed.
- the diameter of the flat surface 1 1 may be about 0.5 mm or less.
- the flat surface 11 is provided with a positive electrode 14 (corresponding to a conductive wire connecting portion), and a negative electrode 15 (conductive wire connection) at a position facing the positive electrode 14 across the center of the spherical crystal 10. Corresponding to the part).
- the positive electrode 14 is connected to the p-type region of the spherical crystal 10, and the negative electrode 15 is connected to the n + -type diffusion layer 12.
- the positive electrode 14 is formed by firing an aluminum paste, and the negative electrode 15 is formed by firing a silver paste.
- S i 0 2 or T I_ ⁇ 2 made of an insulating film antireflection film 1 6 (thickness of about 0.6 to 0. Is formed
- This solar cell element 2 has a light receiving function, receives sunlight and generates a photovoltaic power of 0.5 to 0.6 V between the electrodes 14 and 15.
- the mesh member 3 includes a positive electrode conductive wire 20, a negative electrode conductive wire 21, and a glass fiber tension wire 22.
- Conductive wires 20 and 21 are wires with a diameter of 120 m made of an alloy of nickel (42%), iron (52%), and chromium (6%). 3 ⁇ ).
- both the conductive lines 20, 21 extend in parallel in the column direction, and are the centers of the positive electrode conductive line 20 and the negative electrode conductive line 21 in each column of the adjacent solar cell elements 2.
- the distance between the lines is about 0.75 m, and the distance between the centers of the solar cell elements 2 in the P-contact with the solar cell elements 2 in each row is about 1.75 mm.
- the positive electrode conductive wire 20 is electrically connected to the positive electrode 14 via the solder paste 23, and the negative electrode conductive wire 21 is electrically connected to the negative electrode 15 via the solder paste 23.
- the plurality of solar cell elements 2 in each column are electrically connected in parallel by the two conductive wires 20 and 21, and the solar cell elements 2 in all columns are electrically connected in series. However, this will be described later.
- the conductive wire is not limited to the one having the above-mentioned configuration, but iron, iron (58%) 'nickel (42%) alloy wire, other iron alloy wire, copper wire, beryllium copper wire, phosphor bronze Wires, other copper alloy wires, silver, silver alloy wires, nickel, nickel alloy wires, etc.
- a wire rod such as a beryllium copper wire or a phosphor bronze wire has a panel force, so that the contact with the solar cell element 2 can be reliably maintained.
- the tension wire 2 2 is disposed so as to extend in the row direction so as to be orthogonal to the conductive wires 20 and 21 between the solar cell elements 2 in each row and the solar cell elements 2 in the row adjacent thereto.
- Each tension wire 2 2 is formed by repairing seven glass fibers (diameter: about 9.0 ⁇ ⁇ ).
- Each set of these three tension wires 2 2 has a pitch of about 1.7 5 mm. Arranged between lines.
- Each tension wire 2 2 is woven so as to sew up and down between the two conductive wires 20, 2 1 in order to fix the conductive wires 20, 21.
- a number of tension wires 2 2 are woven into a mesh shape to form a mesh member 3.
- the sealing member 4 includes a plurality of solar cell elements 2, conductive wires 20, 21, and tension wires 2 2 in order to protect the large number of solar cell elements 2 and the mesh member 3. It is configured to be accommodated in an embedded state.
- the seal member 4 is formed into a sheet shape having a thickness of about 100 zm using an insulating transparent polyparaxylene resin.
- This polyparaxylene resin can be coated evenly with few pinholes up to minute parts, has low permeability to gas and water vapor, has high stability to radiation, and has a high refractive index (about 1.6 4).
- Features include low reflection loss on the surface of battery element 2. Therefore, since the sealing member 4 can be formed so as to cover the surface of the solar cell element 2 thinly, the light receiving directivity is wide, the reflection loss is small, the flexible light weight, the bow I tension and the Advantages include high bending strength and high light collection rate.
- the light receiving module sheet 1 regardless of the light incident direction, the light is incident on the light receiving module sheet 1, and when this light is irradiated to a plurality of solar cell elements 2 arranged in a matrix with the same polarity, Light is received by the substantially spherical pn junction 13 formed in the solar cell element 2, and is converted into electric energy by the light receiving function of the solar cell element 2. The electric energy is output to the outside through positive and negative electrodes 14 and 15 that are connected to both electrodes of the pn junction 13 and face each other across the center of the solar cell element 2.
- Fig. 7 shows the equivalent of the solar cell module included in the light receiving module sheet 1.
- Circuit 30 is shown. This equivalent circuit 30 is obtained by replacing each of a large number of solar cell elements 2 arranged in a matrix of a large number of rows and a large number of columns with a diode 31, for example.
- each column of diodes 31 (solar cell elements 2) is connected in parallel by a positive electrode conductive wire 20 and a negative electrode conductive wire 21, and further, for each column positive electrode
- the conductive wire 20 is connected in series to the negative electrode conductive wire 21 in the adjacent row by the serial conductive wire 3 4.
- a fixed amount of molten silicon droplets are allowed to freely fall, and a p-type spherical single crystal 10 having a diameter of about 1.0 mm is formed by rapid solidification by supercooling in the middle of the droplet.
- a portion of the crystal 10 is mechanically polished to form a flat surface 11 (see FIG. 8 (a)).
- the spherical single crystal 10 is heated in oxygen gas containing water vapor at about 100 ° C. for about 40 minutes to form a silicon oxide film 35 having a thickness of about 0.3 m. (See Fig. 8 (b)).
- an acid-resistant wax is melted on the glass plate with a uniform thickness. Press the flat surface 1 1 against the surface to solidify the wax.
- it is immersed in a buffer etchant (NH 4 HF 2 aqueous solution), and only the silicon oxide film 35 exposed from the solidified wax is removed by etching. After that, the spherical single crystal 10 is removed from the glass plate, and the wax is removed (see FIG. 8 (c)).
- the spherical single crystal 10 is heated in a nitrogen carrier gas bubbled with a solution of phosphorus trichloride (POC 1 3 ) for about 3 minutes at about 90 ° C. to obtain a silicon oxide film 3 5
- a solution of phosphorus trichloride POC 1 3
- POC 1 3 phosphorus trichloride
- Forming a phosphorous silicate glass film 36 on the surface of a spherical single crystal 10 on which no oxygen is formed further switching the atmospheric gas to dry oxygen and heating it at about 90 ° C. for 60 seconds, n-type impurity
- the material (phosphorus) is thermally diffused inside the spherical single crystal 10 near the surface.
- the n-type impurity is thermally diffused to form the n + -type diffusion layer 12 on the flat surface 11 covered with the silicon oxide film 35 serving as a mask and the portion other than its vicinity, and this A pn junction 1 3 is formed at the interface between the n + -type diffusion layer 12 and the p-type region of the spherical single crystal 10 (see Fig. 8 (d))
- the silicon oxide film 35 formed on the flat surface 11 and the vicinity thereof is removed with a buffer etchant and heated again in dry oxygen gas at about 80 ° C. for 60 seconds.
- An antireflection film 16 made of a silicon oxide film and also a passivation film is formed on the entire surface of the spherical single crystal 10 (see FIG. 8 (e)).
- aluminum paste 3 7 is dot-printed on the flat surface 1 1, and to form the negative electrode 15, the flat surface 1 across the center of the spherical single crystal 10.
- Silver paste 3 8 is printed on the surface of the n + -type diffusion layer 1 2 opposite to 1 by dot printing, and the spherical single crystal 10 in this state is placed in nitrogen gas at approximately 80 ° C. for 60 minutes. After heat treatment, aluminum paste 3 7 and silver paste 3 8 penetrate antireflection film 1 6, aluminum paste 3 7 is a p-type region of spherical single crystal 10, and silver paste 3 8 is an n + -type diffusion layer 1 2 and low resistance contact (omitter contact), respectively, to complete the solar cell element 2 (see Fig. 3)).
- the voltage-current characteristics of the completed solar cell element 2 under light irradiation by a solar simulator light source are measured, and the solar cell element 2 is selected into a non-defective product and a defective product.
- a quartz positioning jig 41 in which positioning holes 40 are formed at predetermined intervals to prepare the solar cell element 2 is prepared.
- the solar cell element 2 determined to be non-defective is placed in the direction of electrodes 14 and 15 (polarity of electrodes 14 and 15). Align and place in the positioning hole 40 of the positioning jig 41.
- the positive and negative electrodes 14 4 and 15 can be easily identified, and the directions of the electrodes 14 and 15 are simply aligned. be able to.
- the equator line on the horizontal plane of the solar cell element 2 disposed on the positioning jig 41 is substantially the same height as the upper surface of the positioning jig 41.
- the pressure in the positioning hole 40 is reduced to fix the solar cell element 2 to the positioning hole 40.
- the upper surface of the positioning jig 41 is coated with a carbon or boron nitride film so as not to be bonded to a bonding material such as the solder paste 23.
- a mesh member 3 in which the conductive wires 20 and 21 and the tension wire 2 2 are woven is prepared, and the portion of the mesh member 3 where the positive electrode conductive wire 20 and the positive electrode 14 are connected;
- the mesh member 3 and the positioning jig 41 are brought into close contact with a holding jig (not shown) and the solder paste 2 3 and the electrode 14 attached to the conductive wires 20 and 21 , 1 and 5 are in close contact.
- the solder paste 23 is irradiated with a focused beam from an infrared lamp to melt the solder paste 23.
- the conductive wire 20 and the electrode 14 are electrically connected by the solder paste 23, and the conductive wire 21 and the electrode 15 are electrically connected.
- the flux contained in the solder paste 23 is washed away and dried.
- connection method an electric current is applied to the conductive wires 20 and 2 1, the solder paste 2 3 is melted by Joule heat due to the electric current, and the surface tension and fluidity of the solder paste 2 3 are used. May be connected.
- the solder paste 23 may be melted and connected using an infrared lamp and Joule heat. According to this connection method, connection in a short time becomes possible.
- the electrodes 14 and 15 and the conductive wires 20 and 21 can be connected by a conductive epoxy resin.
- the mesh member 3 is placed on the solar cell element 2, and then the epoxy resin is discharged to a desired location by a dispenser. Just heat and cure the Poxy resin.
- a polyparaxylene resin film as the seal member 4 is formed to a thickness of about 100 m over the entire light receiving module sheet 1 such as the solar cell element 2 and the mesh member 3.
- the seal member 4 may be formed by a chemical vapor deposition (CVD) coating system developed by Union Carbide 'and' Plastic, Inc., USA.
- the seal member 4 is not limited to polyparaxylene resin, and a transparent resin such as silicone resin, polyvinyl chloride, or polyester (PET) is formed in a liquid state by spraying or dipping method. It may be formed by forming a film and curing.
- the sealing member 4 is formed on the light receiving module sheet 1 by such a method, and the light receiving module sheet 1 is completed.
- the solar cell element 2 has a positive electrode 14 connected to the flat surface 11 of the spherical crystal 10 and a negative electrode 15 connected to the n + -type diffusion layer 12. Therefore, the solar cell element 2 can be inspected by a solar simulator or the like before being incorporated in the light receiving module sheet 1. Therefore, only the non-defective solar cell element 2 that has passed the inspection can be incorporated into the light receiving module sheet 1, and a high quality light receiving module sheet 1 can be manufactured.
- the positive and negative electrodes 14 and 15 on the solar cell element 2 before assembly the electrodes 14 and 15 and the conductive wires 20 and 21 can be reliably and easily connected. The manufacturing process is simplified.
- the flexible light receiving module sheet 1 can be realized and has excellent strength.
- the light receiving module sheet 1 can be realized.
- the solar cell element 2 Since the solar cell element 2 is provided with the electrodes 14 and 15 at positions facing each other across the center of the solar cell element 2, the current generated in the solar cell element 2 flows symmetrically without being biased. Resistance loss can be greatly reduced, and almost all of the power generated by the pn junction of the solar cell element 2 can be output. Moreover, solar cell element 2 Since it is formed in a spherical shape, it can generate power by receiving incident light from all directions, and can output all the generated power, thereby improving power generation efficiency. Since the light receiving module sheet 1 is protected by the flexible seal member 4, it can be deformed without damaging the solar cell element 2 and the conductive wires 20 and 21.
- the solar cell element 2 is mainly composed of an n-type diffusion layer formed on the surface of the p-type spherical single crystal 10, but the p-type diffusion is formed on the surface of the n-type spherical single crystal 10. It may be composed mainly of those in which a layer is formed. Further, the semiconductor used for the solar cell element 2 is not limited to silicon, but GaAs, GaAl As, InP, InGaP, Ge, GaSb, InGaAs, InGa A semiconductor such as N may be applied. An example in which the embodiment is partially changed will be briefly described.
- the light receiving module sheet 1A is manufactured by connecting the solar cell elements in the state where the electrode is not formed by alloying joining with the conductive wire.
- this manufacturing method will be described.
- both conductive wires 2 OA and 21 A are made of an aluminum wire having a diameter of about 120 ⁇ m and containing 1 to 2% of silicon capable of eutectic reaction with silicon. Since the tension wire 22 is the same as the tension wire 22 in the above-described embodiment, the description thereof is omitted.
- a large number of solar cell elements 2A are arranged on a positioning jig similar to the positioning jig 41, and a mesh member 3A is covered thereon, and both conductive wires 2OA, 21A and a solar battery
- the flat surface 11 of the element 2A (corresponding to the conductive wire connecting portion) and the part (corresponding to the conductive wire connecting portion) facing the flat surface 11 across the center of the solar cell element 2A are brought into contact.
- a passivation film such as a silicon oxide film or a titanium oxide film is formed on the solar cell element 2A by the CVD method, and the sealing member is spread over the entire surface of the light receiving module sheet. 4 is formed to complete the light receiving module sheet 1A.
- an alloy wire of nickel (42%), iron (52%) and chromium (6%) (diameter approximately 120 mm) is used.
- Aluminum or an aluminum alloy film containing 1 to 2% of silicon may be deposited at the junction between the alloy wire and the electrode. Even in this configuration, the conductive wires 2 OA, 21 A and the solar cell element 2 A are connected by melting the aluminum or aluminum alloy film by Joule heat generated by passing an electric current through the alloy wire. be able to. Since this alloy wire has lower electrical conductivity and thermal conductivity than aluminum wire, it has the advantage that it can be joined with less current and has improved tensile strength.
- gold alloy films such as gold / silicon alloy, gold / germanium alloy, gold / tin alloy are deposited at the junctions of the copper wires. Then, these gold alloy films are melted by Joule heat generated by applying current to the conductive wires 20 A and 21 A, and the conductive wires 20 A, 21 A and the solar cell element 2 A are joined. You can do it.
- Gold alloys can be alloyed by eutectic reaction at a lower temperature than aluminum.
- the positive and negative positive electrodes do not need to be formed in advance, and the solar cell element 2 A and the conductive wires 2 OA and 2 1 A can be easily connected. It can be improved and manufacturing costs can be reduced.
- the light receiving module sheet 1 B may be configured.
- the seal member 4 B is bonded to the flexible cushion layer 46 that accommodates the solar cell element 2 and the mesh member 3 in an embedded state, and the upper and lower surfaces of the cushion layer 46.
- the surface layer 45 is made of a transparent white plate tempered glass plate having a thickness of about 2 mm.
- the surface layer 45, the E VA (ethylene butyl acetate) sheet, the mesh member 3 to which the solar cell element 2 is joined, the E VA sheet, and the surface layer 45 The EVA sheet is melted by heating in a laminating device while being evacuated, and the EVA sheet is filled between the upper and lower surface layers 45 and cushion layer 4 6 and the solar cell element 2 and the mesh member 3 are fixed by the cushion layer 46.
- the light receiving module sheet 1 B can be reduced in cost and weight by forming the surface layer 45 with a transparent plate member made of a resin such as polycarbonate or acrylic. Also, as the cushion layer 46: P B V (polybulu petitlar), transparent resin such as acrylic, silicone, etc.
- the solar cell element 2 and the mesh member 3 are sandwiched between the two surface layers 45, so that the strength against mechanical shock can be improved. It can be used as a window glass as a light receiving module sheet.
- the seal member 4 C of the light receiving module sheet 1 C may be configured.
- the seal member 4 C of the light receiving module sheet 1 C is made of a flexible PE (polyester) resin film 50 from the lower layer, an aluminum deposited film 51, a multilayer reflective film 52 of PE resin, and an EVA resin. It consists of the same filler 53 as the cushion layer in which the solar cell element 2 and the net-like member 3 are embedded, a PE-based lunar layer 5 4, a heat ray reflective film 5 5, and a PE-based resin layer 5 6.
- the reflective film 52 is formed on the surface opposite to the light incident side, and reflects and scatters the light incident from the incident side but passing through the solar cell elements 2 to irradiate the solar cell elements 2.
- the heat ray reflective film 55 is a multilayer of polymer materials having different refractive indexes.
- the heat ray reflective film 5 5 selectively reflects heat rays (wavelength 1 350 nm or more) that cannot be absorbed by the solar cell element 2 due to the interference effect due to multilayering, reducing the temperature rise of the solar cell element 2 and photoelectric conversion efficiency Is to improve. Therefore, the light incident from the light-receiving surface (upper surface) of the light-receiving module sheet 1 C is first reflected by the heat ray reflective film 55 and part of unnecessary heat rays, and a part of the remaining light is applied to the solar cell element 2. A part of the light is received and passes between the solar cell elements 2, and the light passing through the solar cell element 2 is reflected by the reflective film 52 and received by the solar cell element 2.
- the PE resin may be made of a flexible synthetic resin such as polycarbonate, polyethylene naphthalate, or fluorine resin.
- a filling material 5 3 may be used such as silicone or poly Biel butyral ⁇ instead of E VA resin.
- the reflective film 52 and the heat ray reflective film 55 can be omitted as appropriate, and other layers can be appropriately changed in accordance with a desired function.
- a roll-to-roll method may be adopted as a method for manufacturing the light receiving module sheet.
- both ends of the mesh member in the width direction are fixed with a heat-resistant resin film such as a polyimide film, and a sprocket hole is provided on the heat-resistant resin film. What is necessary is just to comprise so that a sprocket may be engaged with a hole, a net-like member may be sent, and it may scoop off.
- the light receiving module sheet in which the spherical element is a solar cell element has been described.
- the spherical element is not limited to the solar cell element, and a spherical photodiode or a light emitting diode may be applied.
- these spherical photodiodes and light emitting diodes have almost the same configuration as the solar cell element 2 described above, and the details are described in the applicant's publication W09 / 15/983. The explanation is omitted here.
- a light emitting module sheet having a light emitting diode when a forward current flows through the light emitting diode, electric energy is converted into light energy by the pn junction, and the crystal or diffusion layer material is selected from the vicinity of the pn junction. Light of wavelength is generated and radiated outside.
- a light emitting module sheet comprising a spherical light emitting diode
- light can be irradiated in all directions, and light can be irradiated only in a desired direction by providing a reflection sheet in part. I can do it.
- the light emitting module sheet can be made into a color display by arranging three light emitting diodes of RGB in a matrix and making these light emitting diodes controllable by a control device.
- a single color display may be constituted by a single color light emitting diode.
- a light-receiving module sheet consisting of photodiodes can convert light in all directions into electrical signals.
- the example in which the solar cell elements of all the columns are connected in series has been described.
- a plurality of switches capable of changing the number of columns to be connected in series are provided, and the light intensity and the required amount of power are provided.
- the switch can be configured so that multiple switches can be switched by the control unit.
- the seal member is provided.
- the seal member is not always necessary and can be omitted as appropriate.
- the number of tension members can be changed as appropriate.
- the three tension wires 2 2 are arranged as a set between the rows of the solar cell elements 2.
- the number of tension wires is not limited to three, and according to a desired configuration, 1 A book or multiple books may be arranged as one set.
- the tensile wire may be made of high-strength synthetic resin or plastic such as insulating aramid fiber. With this configuration, the light receiving or light emitting module sheet is further reduced. Flexibility and tensile strength can be improved, and material costs can be reduced.
- Raw tension wire 2 2 is placed not only in the direction perpendicular to the conductor wire, but also between each solar cell element array, as shown in Fig. 1-3. It may be provided so as to be woven in a direction parallel to the conductor wire. With this configuration, the tensile strength in the direction in which the conductor wire extends can be improved.
- FIG. 13 the same components as those in the embodiment are denoted by the same reference numerals and the description thereof is omitted.
- the positive and negative conductive lines are provided in each column.
- the conductive lines may be constituted by one conductive line so that the adjacent positive electrode conductive line and negative electrode conductive line can be used together. With this configuration, it is possible to simplify the configuration by omitting the series conductive wires, and to reduce the interval between the columns and reduce the size of the light receiving or light emitting module sheet.
- the flat surface 11 is formed on the spherical solar cell element 2, but a solar cell element in which the flat surface 11 is omitted may be applied. In such a configuration, it is desirable to change the shape of the positive and negative electrodes so that the positive and negative electrodes can be easily identified.
- a plurality of spherical elements having a light receiving or light emitting function each of which is connected to both electrodes of a substantially spherical pn junction and p ⁇ junction, and has positive and negative conductive wire connecting portions located at both ends of the spherical element.
- a light receiving or light emitting module sheet A light receiving or light emitting module sheet.
- a transparent synthetic resin or transparent glass sealing member is provided, which accommodates the plurality of spherical elements in an embedded state together with a plurality of conductive wires and a plurality of tension wires.
- Light receiving or light emitting module sheet is provided.
- each of the spherical elements is a photodiode element or a solar cell element.
- each of the spherical elements is a light-emitting diode element.
- the conductive wire is connected to the positive / negative conductive wire connecting portion using any one selected from solder, conductive synthetic resin, and alloyed metal.
- solder conductive synthetic resin
- alloyed metal any one selected from solder, conductive synthetic resin, and alloyed metal.
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Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
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JP2005509854A JP3899111B2 (ja) | 2003-10-24 | 2003-10-24 | 受光又は発光モジュールシートの製造方法 |
US10/569,166 US7214557B2 (en) | 2003-10-24 | 2003-10-24 | Light receiving or light emitting modular sheet and process for producing the same |
AU2003275663A AU2003275663B2 (en) | 2003-10-24 | 2003-10-24 | Light receiving or light emitting modular sheet and process for producing the same |
CA2537777A CA2537777C (en) | 2003-10-24 | 2003-10-24 | Light receiving or emitting modular sheet and production method thereof |
CNA2003801102835A CN1771608A (zh) | 2003-10-24 | 2003-10-24 | 受光或发光模块板及其制造方法 |
PCT/JP2003/013666 WO2005041312A1 (ja) | 2003-10-24 | 2003-10-24 | 受光又は発光モジュールシート及びその製造方法 |
EP03758902.5A EP1677362A4 (en) | 2003-10-24 | 2003-10-24 | LIGHT-RECEIVING OR LIGHT-EMITTING MODULAR SHEET AND MANUFACTURING PROCESS THEREFOR |
Applications Claiming Priority (1)
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PCT/JP2003/013666 WO2005041312A1 (ja) | 2003-10-24 | 2003-10-24 | 受光又は発光モジュールシート及びその製造方法 |
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WO2005041312A1 true WO2005041312A1 (ja) | 2005-05-06 |
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PCT/JP2003/013666 WO2005041312A1 (ja) | 2003-10-24 | 2003-10-24 | 受光又は発光モジュールシート及びその製造方法 |
Country Status (7)
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US (1) | US7214557B2 (ja) |
EP (1) | EP1677362A4 (ja) |
JP (1) | JP3899111B2 (ja) |
CN (1) | CN1771608A (ja) |
AU (1) | AU2003275663B2 (ja) |
CA (1) | CA2537777C (ja) |
WO (1) | WO2005041312A1 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
CA2537777C (en) | 2011-08-02 |
CA2537777A1 (en) | 2005-05-06 |
CN1771608A (zh) | 2006-05-10 |
EP1677362A1 (en) | 2006-07-05 |
EP1677362A4 (en) | 2015-11-11 |
US7214557B2 (en) | 2007-05-08 |
AU2003275663A1 (en) | 2005-05-11 |
US20060169992A1 (en) | 2006-08-03 |
JP3899111B2 (ja) | 2007-03-28 |
JPWO2005041312A1 (ja) | 2007-04-05 |
AU2003275663B2 (en) | 2008-04-24 |
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