JP2007059923A - Semiconductor module for emitting light or receiving light - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify a semiconductor module structure to reduce a manufacturing cost, and to simplify a structure of connecting a plurality of semiconductor cells in parallel and a structure of connecting a plurality of semiconductor cells of each group and a plurality of semiconductor cells of the adjacent group in series. <P>SOLUTION: A pair of sheet bodies 81 and 82 and a plurality of granular semiconductor cells 11 are provided between these sheet bodies. Each semiconductor cell has a pair of electrodes 16 and 17 connected to both ends of a p-n junction and has a function of light emission or light reception. In the plurality of semiconductor cells, a conductive direction connecting the pair of electrodes is arranged in a prescribed direction orthogonal to the pair of sheet bodies. A plurality of film-shaped conductive film members 84 to 86 that can be electrically connected to an electrode of the semiconductor cells of a plurality of groups are respectively formed on inner surfaces of the first and second sheet bodies. A mechanism of connecting the plurality of semiconductor cells of each group in parallel through the conductive film members is provided. A mechanism of connecting the plurality of semiconductor cells adjacent to the plurality of semiconductor cells of each group in series is provided. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a light emitting or receiving semiconductor module, and in particular, a plurality of granular semiconductor cells each having a pn junction and a pair of electrodes are grouped and incorporated into a plurality of groups between a pair of sheet bodies, The present invention relates to a mechanism in which semiconductor cells are connected in parallel and a series connection mechanism in which a plurality of semiconductor cells in each group are connected in series to a plurality of adjacent semiconductor cells. This semiconductor module can be applied to various uses such as a solar battery panel and a lighting panel.

  Conventionally, a pn junction is formed on a surface portion of a small-diameter spherical semiconductor element made of a p-type or n-type semiconductor via a diffusion layer, and these semiconductor elements are connected in parallel to a common electrode and used for a solar cell. Technology is being researched. In US Pat. No. 3,998,659, a p-type diffusion layer is formed on the surface of an n-type spherical semiconductor, and a number of spherical semiconductor diffusion layers are connected to a common film-like electrode (positive electrode). An example is described in which a solar cell is configured by connecting a large number of spherical semiconductor n-type cores to a common film-like electrode (negative electrode).

  In U.S. Pat. No. 4,021,323, a p-type spherical semiconductor element and an n-type spherical semiconductor element are arranged in series, and these semiconductor elements are connected to a common film-like electrode, A solar energy converter (semiconductor module) is disclosed in which a diffusion layer of a semiconductor element is brought into contact with a common electrolytic solution, and sunlight is irradiated to cause electrolysis of the electrolytic solution.

  Even in the module using the spherical cells shown in US Pat. No. 4,583,588 and US Pat. No. 5,469,020, each spherical cell is attached by connecting it to a sheet-like common electrode. Therefore, it is suitable for connecting a plurality of spherical cells in parallel, but is not suitable for connecting a plurality of spherical cells in series.

  On the other hand, the inventor of the present application forms a diffusion layer, a pn junction, and a pair of electrodes on a spherical semiconductor element made of a p-type or n-type semiconductor, as shown in WO98 / 15983 and WO99 / 10935. A granular semiconductor cell for light emission or light reception was proposed. In WO98 / 15983, a photocatalytic device for connecting a large number of spherical semiconductor cells in series or connecting a plurality of series connected bodies in parallel for use in solar cells, water electrolysis, etc., various light emission We proposed a semiconductor module applicable to devices and color displays.

U.S. Pat. No. 3,998,659 U.S. Pat. No. 4,021,323 U.S. Pat. No. 4,583,588 US Pat. No. 5,469,020 International Publication WO98 / 15983 International Publication No. WO99 / 10935

  In the semiconductor module, when any semiconductor cell of any series connection body becomes open due to a failure, no current flows in the series circuit including the semiconductor element, and the remaining normal semiconductors in the series connection body The cell also stops functioning, and the output of the semiconductor module decreases. Therefore, the inventors of the present application have conceived a series-parallel connection structure in which a plurality of semiconductor cells are arranged in a matrix, a plurality of semiconductor cells in each column are connected in series, and a plurality of semiconductor cells in each row are paralleled. Has filed an international patent application.

  However, the semiconductor module of WO 98/15983 employs a structure in which a plurality of semiconductor cells are connected in series by connecting the electrodes of the semiconductor cells, and the series connection bodies are arranged in a plurality of rows in a plane. In addition, since the pair of electrodes of the semiconductor cell is very small, when the series-parallel connection structure is adopted, the manufacturing technology becomes complicated, and it is difficult to manufacture a large-sized semiconductor module. The manufacturing cost becomes expensive.

  That is, when a semiconductor module is manufactured, a plurality of semiconductor cells in the first row are connected in parallel, and a plurality of semiconductor cells in the next row are incorporated and connected in a state of being connected in series with a parallel connection. The series-parallel connection structure must be assembled by repeating this. In addition, since there is no space between cells connected in series, there is a problem in that it is not always good to capture ambient light and scattered light.

An object of the present invention is to provide a simple structure mainly composed of a pair of sheet bodies opposed in parallel in a light emitting or light receiving semiconductor module incorporating a plurality of granular semiconductor cells.
Each group of semiconductor cells can be connected in parallel via a conductive film member formed on the inner surface of a pair of sheet bodies, and each group via a metal conductive member connecting the conductive film members of a pair of sheet bodies A plurality of semiconductor cells and a plurality of adjacent semiconductor cells can be connected in series.

  The light emitting or receiving semiconductor module according to the present invention includes a pair of a first sheet body made of a light-transmitting insulating material and a second sheet body made of an insulating material opposed to the first sheet body in parallel. And a plurality of granular semiconductor cells arranged in groups between the sheet bodies, each of the semiconductor cells including a granular p-type or n-type semiconductor crystal, A pn junction formed in a surface layer of the semiconductor crystal, and a pair of electrodes formed opposite to each other at both ends of the semiconductor crystal and connected to both ends of the pn junction, and having a light emitting or receiving function, The semiconductor cell is disposed in a state in which the conductive direction connecting the pair of electrodes is aligned in a predetermined direction orthogonal to the pair of sheet bodies, and a plurality of semiconductor cells are disposed on the inner surface of the first sheet body facing the second sheet body. A plurality of electrically connectable electrodes to a group of semiconductor cells A plurality of conductive film members electrically connectable to electrodes of a plurality of groups of semiconductor cells are formed on the inner surface of the second sheet body facing the first sheet body; A plurality of sets of parallel connection mechanisms for connecting a plurality of semiconductor cells in each group in parallel via conductive film members corresponding to each group on the inner surface of the second sheet body are provided, and adjacent to the plurality of semiconductor cells in each group. A series connection mechanism for connecting a plurality of semiconductor cells in a group in series is provided, and the series connection mechanism is configured to electrically connect the conductive film member of the first sheet body and the conductive film member of the second sheet body. It is a metal conductive member, and is composed of one or a plurality of metal conductive members having substantially the same thickness as the interval between the first and second sheet bodies.

  In the case of a light receiving semiconductor module, when sunlight enters from above the first sheet body, the sunlight passes through the first sheet body and a plurality of semiconductor cells receive light, and the plurality of semiconductor cells generate photovoltaic power. The generated photovoltaic power is output to the outside through the parallel connection mechanism corresponding to each group and the series connection mechanism. In the case of a semiconductor module for light emission, when a forward current is supplied to a plurality of semiconductor cells from the outside through a parallel connection mechanism and a series connection mechanism, the wavelength corresponding to the material of the semiconductor crystal or diffusion layer from each semiconductor cell. Is emitted, and the light passes through at least the first sheet body and is emitted to the outside. In the case where the second sheet body and the conductive film member are light transmissive, light is also emitted from the second sheet body.

Here, it is also possible to appropriately adopt the following configuration.
(1) Each of the semiconductor cells has a light receiving function accompanied by photoelectric conversion, and a large number of fine pyramid cuts or irregularities are formed on the outer surface on the light receiving side of the first sheet body.
(2) Each of the semiconductor cells has a light emitting function involving electro-optic conversion.
(3) The granular semiconductor cell is a spherical semiconductor cell.
(4) The granular semiconductor cell is a cylindrical semiconductor cell.
(5) The second sheet body is formed of a light transmissive sheet body.

(6) The first sheet body is made of a glass sheet body .
(7) The pair of sheet bodies are made of a synthetic resin flexible sheet body.
(8) An insulating transparent synthetic resin is filled in a space between the plurality of semiconductor cells between the pair of sheet bodies.

  In this semiconductor module for light emission or light reception, a plurality of semiconductor cells, first and second sheet bodies, conductive film members corresponding to a plurality of groups of semiconductor cells formed on the inner surfaces of these sheet bodies, a plurality of semiconductors in each group Since it is composed of one or more metal conductive members that connect a cell and a plurality of adjacent semiconductor cells in series, the structure of the semiconductor module is simplified, the manufacturing technology is simplified, and the manufacturing cost is reduced. Can be reduced.

In particular, since the conductive directions of the plurality of semiconductor cells are aligned in a predetermined direction orthogonal to the pair of sheet bodies, the manufacture of the semiconductor module is simplified.
Since the semiconductor cells of each group are connected in parallel, the function of a normal semiconductor cell is not impaired by a failed semiconductor cell or electrical connection part. Moreover, since the series connection mechanism is composed of one or more metal conductive members, the structure of the series connection mechanism is simplified.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 and FIG. 2 show spherical solar cells 1 and 11 as granular light receiving semiconductor cells. The spherical solar cell 1 shown in FIG. 1 is formed from a spherical crystal 2 having a diameter of about 0.6 to 2.0 mm made of a p-type silicon single crystal having a resistivity of about 1 Ωm. A flat surface 3 having a diameter of about 0.6 mm is formed at the lower end of the spherical crystal 2, and an n ^{+ -type} diffusion layer 4 (thickness of about 0.4-0) in which phosphorus (P) is diffused on the surface of the spherical crystal 2. .5 μm) and a pn junction 5 are formed. The diameter 0.6 mm of the flat surface 3 is the size of the spherical crystal 2 having a diameter of 2.0 mm.

A pair of electrodes 6, 7 (positive electrode 6 and negative electrode 7) are provided on both ends facing each other across the center of the spherical crystal 2, and the negative electrode 7 is disposed on the flat surface 3. The positive electrode 6 is connected to the spherical crystal 2, and the negative electrode 7 is connected to the n ^{+ -type} diffusion layer 4. An antireflection film 8 (thickness of about 0.6 to 0.7 μm) made of an insulating film of SiO ₂ or TiO ₂ is formed on the entire surface excluding the positive electrode 6 and the negative electrode 7. The positive electrode 6 is formed, for example, by baking an aluminum paste, and the negative electrode 7 is formed by baking a silver paste.

Such a spherical solar cell 1 has a flat surface 3, an n ^{+ -type} diffusion layer 4, and a pair of electrodes 6, 7 after the spherical crystal 2 is manufactured by the method proposed by the present inventor in WO 98/15983. The antireflection film 8 can be formed. When manufacturing the spherical crystal 2, a drop tube with a height of about 14 m is adopted, and the surface tension is applied while free-falling the p-type silicon grains as a raw material by heating and melting inside the top end of the drop tube. While maintaining the true spherical shape, it is solidified to produce a substantially true spherical crystal 2. The spherical crystal 2 may be formed into a spherical or almost spherical crystal by a method such as a mechanical polishing method without depending on the dropping tube.

The flat surface 3 can be formed by mechanically polishing a part of the spherical crystal 2. Since the flat surface 3 is formed, the spherical crystal 2 is difficult to roll, and can be adsorbed by vacuum tweezers, and the positive electrode 6 and the negative electrode 7 can be distinguished. Next, in the case of forming the n ^{+ -type} diffusion layer 4, phosphorus (P) as an n-type impurity is a known method or a method disclosed in the above publication with a part of the top of the spherical crystal 2 being masked. To diffuse the surface of the spherical crystal 2. The pair of electrodes 6 and 7 and the antireflection film 8 can also be formed by a known method or the method disclosed in the above publication. The spherical solar cell 1 has a photoelectric conversion function, receives sunlight and generates a photovoltaic power of 0.5 to 0.6V.

The spherical solar cell 11 shown in FIG. 2 is constructed by reversing the positions of the n ^{+ -type} diffusion layer 14 and the pair of electrodes 16 and 17 as compared with the spherical solar cell 1 shown in FIG. is there. This spherical solar cell 11 includes a spherical crystal 12 made of p-type silicon single crystal, a flat surface 13, an n ^{+ -type} diffusion layer 14, a pn junction 15, a pair of electrodes 16 and 17 made of a positive electrode 16 and a negative electrode 17, and antireflection. The film 18 is the same as the spherical crystal 2, the flat surface 3, the n ^{+ -type} diffusion layer 4, the pn junction 5, the pair of electrodes 6 and 7, and the antireflection film 8 in the spherical solar cell 1. Can be similarly produced or formed.

  Next, a panel-shaped solar module as a semiconductor module can be configured by using one or both of the two types of spherical solar cells 1 and 11. Therefore, in this embodiment, the structure of the solar module 20 employing the spherical solar cell 11 will be described with reference to FIGS.

  The solar module 80 includes first and second sheet bodies 81 and 82, three groups of 72 spherical solar cells 11 incorporated between the sheet bodies 81 and 82, and a parallel connection in which the groups of spherical solar cells 11 are connected in parallel. The connection mechanism includes 24 series solar cells 11 in each group and 24 series solar cells 11 in groups adjacent to the connection mechanism.

  The 24 spherical solar cells 11 in each group are arranged in a matrix of 6 rows and 4 columns with the positive electrode 16 facing down and the negative electrode 17 facing up, and the conductive films 83 to 83 of the first and second sheet bodies 81 and 82 are arranged. 86 are connected in parallel. Six rows of spherical conductors 87 are arranged on the left side of the central group, and six rows of spherical conductors 87 are arranged on the left side of the right group. The spherical solar cells 11 in the group are connected in series by six spherical conductors 87, and the spherical solar cell 11 in the center group and the spherical solar cell 11 in the left group are connected in series by six spherical conductors 87. The conductive films 83 to 86 correspond to “conductive film member”, and the spherical conductor 87 corresponds to “metal conductive member”.

  The 1st sheet | seat body 81 is comprised with the glass plate which formed the pyramid cut on the upper surface side. The second sheet body 82 is composed of a printed circuit board made of FRP such as glass epoxy. FIG. 3 shows the first sheet body 81 upside down. On the inner surface of the first sheet body 81, three conductive films 83 made of a transparent conductive thin film of metal oxide are formed. Yes. As shown in FIG. 4, four conductive films 84 to 86 having a light reflecting function are formed on the inner surface of the second sheet body 82. The conductive films 84 to 86 are obtained by performing silver plating on the surface of a copper foil having fine irregularities formed on the surface.

  At the left end portion of the second sheet body 82, a positive electrode terminal 88 that is connected to the conductive film 84 and penetrates the second sheet body 82 is formed. At the right end portion of the second sheet body 82, a negative electrode terminal 89 connected to the conductive film 86 and a pin-like negative electrode terminal 89 penetrating the second sheet body 82 is formed. Between the conductive film 83 of the first sheet body 81 and the conductive film 86 of the second sheet body 82, a spherical diode 90 that prevents a current from flowing backward from the positive terminal 88 to the solar module 80 is connected.

  The spherical conductor 87 is obtained by silver-plating the surface of a small sphere of iron alloy and forming a pair of electrodes on the upper and lower ends (however, this can be omitted). The height of the spherical conductor 87 ( (Thickness) is the same as the interval between the first and second sheet bodies 81, 82, that is, the height of the end spherical solar cell 11.

  As shown in FIG. 6, the spherical diode 90 includes a spherical crystal 95 made of p-type silicon, an n-type diffusion layer 96, a substantially hemispherical pn junction 97, and a pair of electrodes 91 and 92 (anode 91 and cathode 92). And a metal film 92a and an insulating film 98 covering the upper half of the cathode 92 side. The anode 91 of the spherical diode 90 is connected to the conductive film 86.

Next, a method for manufacturing the solar module 80 will be briefly described.
First, first and second sheet bodies 81 and 82, 72 spherical solar cells 11, 12 spherical conductors 87, a spherical diode 90, and the like are prepared in advance. Next, the conductive film 83 is formed on the inner surface of the first sheet body 81, the conductive films 84 to 86 are formed on the inner surface of the second sheet body 82, and the positive electrode terminal 88 and the negative electrode terminal 89 are also formed. Next, 24 spherical solar cells 11 in 6 rows and 4 columns are arranged on the conductive films 84 and 85 of the second sheet 82, and the positive electrode 16 of each spherical solar cell 11 is applied to the conductive films 84 and 85 with a conductive adhesive. Glue. In addition, a spherical diode 90 is disposed at the center of the conductive film 86, and the anode 91 is bonded to the conductive film 86 with a conductive adhesive.

  Next, a conductive adhesive is applied to the negative electrodes 17 of all the solar cells 11, the tops of all the spherical conductors 87, and the cathodes 92 of the spherical diodes 90. And the sealant 93 is affixed on the outer peripheral part of the inner surface of the 2nd sheet | seat body 82, and the opening part 93a is formed. In this state, the first sheet body 81 in a normal posture is brought close to and opposed from above the second sheet body 82, and each conductive film 83 of the first sheet body 81 is made to correspond to the negative electrode of the spherical solar cell 11 of each group. 17 and the top of each row of spherical conductors 87 is bonded to the corresponding conductive film 83.

  Then, the sealant 93 is heated and cured in a state where the sealant 93 is adhered to the first sheet body 81. Thereafter, a melt of a transparent synthetic resin such as an acrylic resin is filled inside from the opening 93 a of the sealant 93 and is cured to obtain a transparent filler 94. In this way, the solar module 80 is completed.

Next, the operation and effect of the solar module 80 will be described.
In this solar module 80, the 24 spherical solar cells 11 of each group are connected in parallel by vertically conductive films 83, 84; 83, 85; 83, 85, and the left side of the spherical solar cells 11 and the central group. The spherical solar cells 11 are connected in series by six spherical conductors 87, and the central group of spherical solar cells 11 and the right group of spherical solar cells 11 are connected in series by six spherical conductors 87.

  As described above, in the solar module 80, the 72 solar cells, the first and second sheet bodies 81 and 82, and the conductive films 83 corresponding to the three groups of solar cells 11 formed on the inner surfaces of the sheet bodies 81 and 82 are provided. ˜86, because it is composed of six spherical conductors 87 that connect 24 solar cells 11 in each group and 24 solar cells 11 in adjacent groups in series, the structure of the solar module 80 is simplified and manufactured. Technology is also simplified and manufacturing costs can be reduced.

  In particular, since the conductive directions of the 72 solar cells 11 are aligned in a predetermined direction orthogonal to the main surfaces of the pair of sheet bodies 81 and 82, the solar module 80 can be manufactured easily. Since the 24 solar cells 11 of each group are connected in parallel, the function of the normal solar cell 11 is not impaired by the failed solar cell 11 or the electrical connection portion. Moreover, since the series connection mechanism is composed of the six spherical conductors 87, the structure of the series connection mechanism is simplified.

  When extraneous light incident on the first sheet 81 reaches the spherical solar cell 11, the spherical solar cells 11 of each group generate a photovoltaic power of about 0.6V, and are generated by the photovoltaic power (about 1.8V). The current is output from the positive terminal 88 to the battery or an external load. In the solar module 80, since the spherical solar cells 11 having a plurality of rows and a plurality of columns are provided in each group, the entire solar module 80 can increase the output current and keep the output voltage low as necessary.

  However, the output voltage can be increased by connecting a plurality of solar modules 80 in series. Moreover, since the diode 90 for backflow prevention is incorporated, it is possible to reliably prevent the reverse current flowing from the outside to the positive terminal 88 of the solar module 80 and to prevent the solar cell 11 from being destroyed due to the reverse current.

  In this solar module 80, since one kind of spherical solar cell 11 is adopted, the conductive direction of all the semiconductor cells 11 is aligned in a predetermined direction orthogonal to the pair of sheet bodies 81, 82. This is advantageous in terms of manufacturing the spherical solar cell 11 and assembling the solar module 80. Since the plurality of rows and columns of spherical solar cells 11 are provided in each group, the structure of the conductive films 83 to 85 is simplified. Since the conductive films 84 to 86 of the second sheet 82 have a light reflecting function, the light incident through the first sheet 81 is reflected and scattered and easily absorbed by the spherical solar cell 11.

  The second sheet 82 is made of a transparent material, and the conductive films 84 to 86 of the second sheet 82 are made of a transparent conductive metal oxide or synthetic resin, and receive light from both sides of the solar module 80. It is also possible to make it. Further, a solar module employing the solar cell 1 instead of the solar cell 11 may be used. Alternatively, the solar module 80 may have a flexible structure that can be bent like a curved surface. Instead of the spherical conductors 87 in each row, it is also possible to apply one metal rod having a thickness (height dimension) substantially equal to the distance between the first and second sheet bodies 81 and 82. In addition, a plurality of spherical diodes 90 may be provided. Furthermore, instead of the first sheet body 81, a first sheet body 81A shown in FIG. In this first sheet 81 </ b> A, three sets of printed wirings 99 (corresponding to “conductive film members”) as conductive films as shown in the figure are formed instead of the three conductive films 83.

Next, various examples for modifying the above-described embodiment and modified embodiments will be described.
1] The granular spherical solar cells 100 and 110 shown in FIG. 8 and FIG. 9 have the same size as the spherical solar cells 1 and 11 and have the same power generation function. Instead of the spherical solar cells 1 and 11, it can be applied to a solar module.

  A solar cell 100 shown in FIG. 8 includes an n-type silicon single crystal spherical crystal 101, a flat surface 102 formed at one end of the spherical crystal 101, a p-type diffusion layer 103, a pn junction 104, and a negative electrode 107 formed on the flat surface 102. And a positive electrode 106 facing the negative electrode 107 across the center of the spherical crystal 101, an antireflection film 105 made of an insulating film, and the like.

  A spherical solar cell 110 shown in FIG. 9 has a p-type silicon single crystal spherical crystal 111, flat surfaces 112 and 113 having different sizes formed at both ends of the spherical crystal 111, an n-type diffusion layer 114, a pn junction 115, and a large size. A positive electrode 117 formed on the flat surface 112, a negative electrode 118 formed on the smaller flat surface 113 facing the positive electrode 117 across the center of the spherical crystal 111, an antireflection film 116 made of an insulating film, and the like.

2] Since the granular cylindrical solar cell 120 shown in FIG. 10 has the same size as the spherical solar cells 1 and 11 and has the same power generation function, the spherical solar cells 1 and 11 or the spherical solar cells 1 and 11 are used. 11 can be applied to a solar module. This cylindrical solar cell 120 is manufactured from a cylindrical body made of p-type silicon having a resistivity of about 1 Ωm and having a diameter of 1.5 mm. The cylindrical solar cell 120 includes a pair of cylindrical crystals 121 made of p-type silicon, an n-type diffusion layer 122, a pn junction 123, a p ^{+ -type} diffusion layer 124, and both ends of the cylindrical solar cell 120 in the axial direction. Electrodes 125 and 126 (positive electrode 125 and negative electrode 126), an antireflection film 127 made of an insulating film, and the like.

  3] The solar module is an example of a light receiving semiconductor module, but instead of the spherical solar cells 1 and 11 in the solar module, a granular light emitting diode (LED) that emits light by electro-optic conversion, the spherical solar cell 1, By incorporating a light emitting diode having the same structure as that of No. 11, a light emitting semiconductor module that emits light in a planar manner can be manufactured. In the case of a light-emitting diode, the electrode in contact with the p-type crystal or diffusion layer becomes the anode, the electrode in contact with the n-type diffusion layer or crystal becomes the cathode, and when a forward current flows from the anode to the cathode, the crystal or diffusion from the vicinity of the pn junction. Light of a wavelength corresponding to the material of the layer is generated and emitted to the outside.

  Note that the spherical light emitting diode proposed by the inventor of the present application in WO98 / 15983 and a spherical light emitting diode having a similar structure can also be employed. In the light emitting semiconductor module, the transparent first and second sheet bodies are used to emit light from both sides, or the transparent first sheet body and the opaque second sheet that reflects light toward the first sheet body. A form such as a module that emits light only on one side using a body is adopted.

  4] In the solar module 80, the case where a large number of convex portions and pyramid cuts are formed only on the outer surface of the first sheet body 81 has been described as an example. However, when light is also received from the second sheet body 82, A large number of convex portions and pyramid cuts may be formed on the outer surface of the two-sheet body 22 similarly to the outer surface of the first sheet body 21. However, the pyramid cut on the surface of the first sheet body of the solar module 80 is not indispensable, and the surface of the first sheet body 81 may be formed on a flat surface having no irregularities.

5] The spherical solar cells 1 and 11 have been described with reference to a light receiving semiconductor cell made of a silicon semiconductor. However, SiGe, GaAs and a compound thereof, InP and a compound thereof, CuInSe ₂ and a compound thereof, CdTe and a compound thereof. It is also possible to constitute a light receiving semiconductor cell having a photoelectric conversion function with a semiconductor such as. Alternatively, when a semiconductor module for light emission is configured by incorporating a semiconductor cell for light emission, it is light-emitting with a semiconductor such as GaAs and its compound, InP and its compound, GaP and its compound, GaN and its compound, SiC and its compound, etc. A light emitting semiconductor cell having a conversion function can also be formed.

  6] The second sheet body 82 may be constituted by a printed board, a ceramic wiring board, a metal wiring glass board, or a transparent glass plate.

  7] Instead of the conductive adhesive, an indium alloy may be used. The filler 94 is not essential and may be omitted. The backflow preventing spherical diode 90 is not essential and may be omitted.

It is sectional drawing of the spherical solar cell which concerns on the Example of this invention. It is sectional drawing of another spherical solar cell. It is a back view of the 1st sheet | seat body of a solar module. It is a top view of the 2nd sheet object. It is sectional drawing of a solar module. It is sectional drawing of a spherical diode. It is a reverse view of the 1st sheet | seat body which concerns on the example of a change. It is sectional drawing of another spherical solar cell. It is sectional drawing of another spherical solar cell. It is sectional drawing of a cylindrical solar cell.

Explanation of symbols

80 Solar module 1, 11 Spherical solar cell 81 First sheet body 82 Second sheet body 6, 7, 16, 17 Electrode 91, 92, 106, 107 Electrode 117, 118 Electrode 100, 110 Spherical solar cell 120 Cylindrical solar cell

Claims (9)

A pair of sheet bodies including a first sheet body made of a light transmissive insulating material and a second sheet body made of an insulating material opposed in parallel to the first sheet body, and a plurality of sheets between the sheet bodies A plurality of granular semiconductor cells arranged in groups, and
Each of the semiconductor cells includes a granular p-type or n-type semiconductor crystal, a pn junction formed in a surface layer portion of the semiconductor crystal, and formed opposite to each other at both ends of the semiconductor crystal and connected to both ends of the pn junction. A pair of electrodes and a light emitting or receiving function,
The plurality of semiconductor cells are arranged in a state in which a conductive direction connecting a pair of electrodes is aligned with a predetermined direction orthogonal to the pair of sheet bodies,
On the inner surface of the first sheet body facing the second sheet body, a plurality of film-like conductive film members that can be electrically connected to the electrodes of the plurality of groups of semiconductor cells are formed,
A plurality of conductive film members that can be electrically connected to the electrodes of a plurality of groups of semiconductor cells are formed on the inner surface of the second sheet body facing the first sheet body,
Providing a plurality of sets of parallel connection mechanisms for connecting in parallel a plurality of semiconductor cells of each group via conductive film members corresponding to each group of the inner surfaces of the first and second sheet bodies;
A series connection mechanism for connecting a plurality of semiconductor cells in each group and a plurality of semiconductor cells in a group adjacent thereto in series,
The series connection mechanism is one or a plurality of metal conductive members that electrically connect the conductive film member of the first sheet body and the conductive film member of the second sheet body, between the first and second sheet bodies. Consists of one or more metal conductive members having the same thickness as the interval,
A semiconductor module for light emission or light reception characterized by the above.   2. The light emitting device according to claim 1, wherein each of the semiconductor cells has a light receiving function accompanied by photoelectric conversion, and a large number of fine pyramid cuts or irregularities are formed on an outer surface on a light receiving side of the first sheet body. Or a light receiving semiconductor module.   The semiconductor module for light emission or light reception according to claim 1, wherein each of the semiconductor cells has a light emission function accompanied by electro-optic conversion.   The light emitting or receiving semiconductor module according to claim 1, wherein the granular semiconductor cell is a spherical semiconductor cell.   The light emitting or receiving semiconductor module according to claim 1, wherein the granular semiconductor cell is a cylindrical semiconductor cell.   The light emitting or light receiving semiconductor module according to claim 1, wherein the second sheet body is made of a light transmissive sheet body.   The light emitting or light receiving semiconductor module according to claim 1, wherein the first sheet body is made of a glass sheet body.   2. The semiconductor module for light emission or light reception according to claim 1, wherein the pair of sheet bodies are made of a synthetic resin flexible sheet body.   The light emitting or receiving semiconductor module according to claim 1, wherein an insulating transparent synthetic resin is filled in a space between the plurality of semiconductor cells between the pair of sheet bodies.

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