JPS6042876A - Cloth-like solar battery - Google Patents

Abstract

PURPOSE:To contrive to improve the efficiency of power take-out by the alleviation of resistive potential drop by a method wherein the outermost layer of semiconductor inscribed to a transparent insulation layer of the outermost layer is provided with a metallic electrode layer. CONSTITUTION:An N-Si layer 32 is adhered on a glass fiber 30 coated with a transparent conductive film 31, next an I-Si layer 33 on the Si 32, and further a P-Si layer 34 theron. Then, an In ribbon 35 is wound on the layer 34 in close contact, and thus a conductive zone is provided in a spiral form. When it is heated, In-Si alloy is formed and the ribbon 35 welds to the layer 34. The transparent insulation layer 36 is formed on this multilayer-structural fiber. Using this translucent multilayer-structural solar battery fiber as the warp, and the glass fiber as the woof, the title solar battery is manufactured by corsswise-alternate knitting. Thereby, the improvement of the efficiency of power take-out and the reduction of manufacturing cost are enabled.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to solar cells, and particularly to a fabric solar cell having a two-dimensional wide-1tiD structure by knitting solar cell fibers having a multilayer structure.

Solar cells are expected to be a source of clean energy and have been considered as an alternative energy source amid concerns about the depletion of oil resources. However, the power generation cost of solar cells is extremely high due to the cost of materials (approximately 4,000 yen/W in 980).
) It seems likely that it will still be some time before it becomes widespread as a power source for general electricity. However, as the power generation efficiency of commercially available products has reached 5 to 10 inches, demand for portable power sources and local power generation on remote islands is rapidly increasing. At this stage, what is essentially desired for solar cells is lower costs and higher added value. In other words, in order to rapidly expand the market, it is necessary for it to occupy the position of an essential item as a "household power source" in a different sense from a power source for electric power. With high value-added solar cells in mind, the inventor of the present application disclosed a multilayer coaxial fibrous solar cell in Japanese Patent Publication No. 58-55718. While conventional solar cells have a flat panel shape, this solar cell has a two-dimensional shape made of flexible multilayer coaxial solar cell wires. In addition to being easy to increase in area, it has extremely high flexibility and sufficient mechanical strength, making it extremely easy to process into secondary products.

The problem with the above-mentioned multilayer coaxial fibrous solar cell is mainly the power generation cost. In other words, when a two-dimensional fisherman creates a two-dimensional effect by knitting multilayer coaxial solar cell wires using core wires and conductive layers that do not transmit visible light, when the lines intersect alternately in the vertical and horizontal directions, the light is blocked in the area located below the point of intersection. It does not generate electricity due to If you make a cloth that is evenly knitted vertically and horizontally without any gaps,
“Because the back surface also does not contribute to power generation, only about 1/2 of the total surface area of the solar cell edge has power generation capacity.Furthermore, in a structure in which several solar power curves are twisted together and then organized vertically and horizontally, the g-element area ratio is even greater. As a result, the material cost increases by about an order of magnitude compared to the case where the entire surface area of the solar cell edge contributes to power generation.Of course, since this solar cell wire has a thin film structure, the crystalline wafer cut from the ingot - the material from the solar cell. The cost is low. However, when comparing thin-film solar cells, the substantial increase in material costs is undesirable because it reduces the high added value of this new type of solar cell. In order to improve this problem, the inventors of the present invention As a result of further studies, they came to disclose a cloth-like solar cell having the structure as described above.That is, (1) Alternating arrangement in the vertical and horizontal directions.

In the fabric-like solar cell, the multilayer structure solar cell fiber is used only in one of the warp and weft, and the other is made of non-power generating transparent fiber. battery. (2) When knitting vertically and horizontally alternately, create a gap between adjacent warp or weft yarns,
A cloth that allows outside light to be introduced to the back side by using fibers that are transparent or mixed with non-power generating transparent fibers, and that has power generation ability not only on the front side but also on the back side by arranging a scattering reflector on the back side. It is a shaped solar cell. Depending on the purpose of use (
It is obvious that 1) and (2) can be used alone or in combination.

Furthermore, as a result of studying the power generation efficiency of the multilayer structure solar cell fiber, the present inventor found that in order to reduce the resistive potential drop in the long fiber, it is necessary to add metal to the outermost semiconductor layer inscribed in the outermost transparent insulating layer. It was concluded that it is effective to provide an electrode layer 11. In order not to prevent the metal electrode layer from entering the semiconductor layer for photoelectric conversion, the metal electrode layer is wound spirally at an appropriate pitch or arranged in thin filaments along the long axis of the solar cell fiber.

It is desirable that the transparent insulating layer constituting the outermost layer of the multilayered solar cell fiber is made of a synthetic resin with a low melting point. This is because there is a difference in height on the surface due to the arrangement of the metal electrode layer of the outermost layer of the semiconductor, and since the materials of the semiconductor and metal are different, it is difficult to cover the entire surface of the solar cell fiber with a transparent oxide film due to the continuous manufacturing process. This is because it is difficult and ultimately leads to an increase in manufacturing costs. A transparent insulating coating can be easily applied by immersing it in a synthetic resin melt having a low melting point of 300° C. or less.

The present invention will be described in detail below based on examples.

(Part 1) A Ni wire with a diameter of 1 m is used as the core wire 1, and as shown in FIG. 1, it is filled in a quartz container 3 heated in a nitrogen gas atmosphere and immersed in a -fcSi saturated Sn solution 4. . The bottom of the quartz container 3 is filled with polycrystalline silicon lumps 2 doped with phosphorus at a high concentration, and is held in contact with the bath liquid 4 by partition plates 5 having a large number of small holes. As shown in the figure, the solution 4 is provided with a temperature gradient such that the temperature is higher at the bottom of the container and becomes lower toward the top of the container. The silicon lump 2 is dissolved in the Sn solution in a saturated amount at the temperature TI, and is carried to the upper part of the container at a lower temperature by the convection and diffusion of the solution, so the phosphorus dope S1 in the solution becomes supersaturated near the upper part of the solution. ing. Ni core IIi! 1 is immersed in the solution 4 through a quartz rotating shaft 11 provided in the supersaturated region of the solution 4 and provided with 2G as shown in the figure. At this position, the Ni core wire 1 is at the temperature T* of the rotating shaft 11.
It is heated to a temperature close to (Ta < Tt), and n-Si can be precipitated on the Ni core wire 1 by an amount corresponding to the temperature difference between TI and T3. The actual precipitated f is the bath solution 4 of the Ni core wire 1.
The immersion time can be adjusted by adjusting the immersion time, that is, the pulling speed of the core wire 1. Usually, this tensile speed is adjusted so that the thickness of the n-8n layer on one core wire 1 is about 5 μm. At this time, the carrier concentration of the n-8i layer is approximately ''×10''e-
Adjust the phosphorus level in the silicon lump so that

The N1 core wire 1 on which the n-Si layer was deposited is connected to the quartz rotating shaft 6
After that, the quartz rotating shaft 12 is wound and immersed in the second 81 saturated anium solution filling container 7. The bottom of the quartz container 7 is filled with a polycrystalline silicon block 8 doped with boron at a high concentration, and is partitioned by a porous quartz partition plate 10. Container 7
The temperature T3 of the polycrystalline silicon lump 8 at the bottom of the is lower than T1, and the temperature T4 of the an solution at the position of the rotating shaft 12 is
(<Tl') is kept lower than T8, so p-St is in a supersaturated state at the position of the rotating shaft 12, and the gap N
The '20 L fc n-81 layer deposited on the 1-core wire 1 does not dissolve even when immersed in the solution 9 (a crystalline p-8i layer is deposited on the n-81 layer).

In this case, the temperature Ts and the boron concentration contained in the silicon lump 8 are adjusted so that the thickness of the p-8 upper layer is about 4 μm and the carrier concentration is about IX'10''(II-'). The Ni core wire 1 #'i on which the St layer containing the p-n junction is coated is taken out into the air through the quartz rotation 11118, and then immersed in the glue solution 17 held in the container 16 to form a thin layer of glue. After application, the surface has a width of 3
A 00 μm AN ribbon 14 is tightly wound in a spiral shape.

The pitch will be approximately 100m. Next, when this ribbon-wrapped 81-layer MNi core 1Is1 is heated to 450°C in an electric furnace in an air or oxygen atmosphere, the glue is oxidized and removed, but the Sn glue remains on the surface of the p-st layer directly under the IJ bond 14. a
n-St gold alloy formed Sn IJ bond 14 p-s
Weld to the i-layer. This Sn ribbon layer acts as a good surface metal electrode for the p-8n layer. The N1 core wire 1 can be used as is as a resistive electrode for the N-81 layer.

A comparative sample was made to test the effectiveness of the Sn ribbon layer. Sample A has a diameter of 1 m (after forming a Si layer including a p-n junction on a DNi core wire as in the above example,
-5nC on the surface of the p-Si layer as in the example of No. 35718
j) 5nOa film (thickness approx. 2
0ODA), and this transparent conductive layer t-'p-8t
There were five resistive electrodes for each layer. Also sample B
No resistive electrode was provided for the p-8 upper layer, and the rest was exactly the same as the above example. Sample C of the sn ribbon layer-strapped solar cell fiber of this example was prepared, and each sample was prepared in lengths of 5o (to). At one end of each sample, remove the adhesion layer on the N1 core wire by 51 m using an acidic etching solution.
11 were exposed. In sample A, a thin layer (thickness 3000A) of Au was evaporated on the top layer 5N (h layer), and in sample B, a thin layer of Au was evaporated on the top p-st layer, and the lead wire was attached as a terminal. Au evaporation part The thickness was kept at about 3 cm directly above the Nl core exposed portion, and care was taken to prevent short-circuiting of the p-n junction due to Au evaporation.At the ends of each sample A, B, and C,
A wire was soldered to the exposed Ni core wire and the Au vapor deposited film or the Sn ribbon, and a voltmeter was connected between the plus and minus lead wires of each sample. Each sample was placed in a simulated solar source generator under the same conditions and irradiated with simulated sunlight at an intensity equivalent to direct sunlight in midsummer. At this time, the open circuit voltage of sample C was approximately 0.78V, but that of sample A was approximately α68V.

Sample B was approximately 0.46V, demonstrating the superiority of the metal electrode over the p-81 layer. This generated voltage difference increases as the irradiation light intensity becomes weaker, and at an intensity of about 175V under the above experimental conditions (direct midsummer sunlight), the potential difference between Sample A and Sample C reached Q, 22V.

Now, in this example, n-8i and p-19i are placed on the Ni core wire.

After successively forming each layer of ribbon-like an, a transparent plastic liquid was applied thereon and dried. This transparent plastic layer acts as a transparent insulating layer. By winding this wire at a constant speed, as long as the silicon lumps 2 and 8 remain at the bottoms of the quartz containers 3 and 7, filamentous fibers having a constant thickness of the St source electroelectric conversion layer are continuously formed. The wound multilayer solar cell fiber is thin (about 1 am in diameter), highly flexible, and has sufficient mechanical strength.

This multilayer structure solar cell fiber is used for the weft 201, and the warp 201 is used for the weft 201.
In 00, a cloth (knitted fabric) having a two-dimensional spread 9 can be obtained by knitting a transparent synthetic fiber yarn, such as a nylon yarn, with a diameter of about 1 am in alternating length and width directions. This cloth is cut to an appropriate size, and only one end of the weft is immersed in an organic solvent to remove the insulating plastic film on the surface. FIG. 2 shows an example of series connection of weft threads at one end with the plastic film removed.

That is, as shown in FIG. 2(a), when one end of the weft (+4 on the right in the figure) made of multilayer solar cell fiber is immersed in an organic solvent and the outermost transparent plastic film 201 is removed, the Sn ribbon is formed. Layer 202 T-helical VC welded p-8i layer 205 is exposed. As mentioned above, the warp is made of transparent synthetic fiber yarn 200, and even if the weft intersects so that it is located below the warp, visible light passes through the warp and enters the weft at the crossing point, so the surface The non-power generation area is 8
It is only directly under the n-ribbon layer 202. Exposed P-81
When a part of the layer 205 is immersed in a fluoronitric acid etching solution, s
n ribbon 202. Since the p-8i layer 203 and the n-81 layer 204 are removed, as shown in FIG. 2(b), the N
1 core! 11 is exposed. Next, the Sn ribbon layer 202 and the n-8i layer 20 are formed by the resistive electrode of the D-8i layer 203.
Solder lead wires using a known method to each of the N1 core wires 1, which are resistive electrodes of 4, and attach solar cell fibers to the wefts.
If they are connected in series, the result will be as shown in Fig. 2(c). For simplicity, only three weft threads are shown in the figure, but the same effect applies no matter how many weft threads are connected. The lead wire pulled out from the Sn ribbon layer 202 forms the (+)lIIl terminal of the battery, and the N1 core 1!1
The lead wire from forms the (-) side terminal. Although not shown in this example, in order to connect these solar cell fibers in parallel, the Sn ribbon layers 202 are connected in parallel, as is usually done.
It is obvious that it is sufficient to connect the N1 core wires 1 to each other.

Further, since the end opposite to the illustrated weft end is left exposed by cutting, this part is again insulated by applying and drying a transparent plastic liquid. This treatment is performed at the ends to prevent short circuits at the Cp-n junctions, unintentional contact with adjacent solar cell fiber conductive parts, electric shocks and leakage to the user, and to mechanically protect the ends. Needless to say, this can be achieved not only by the plastic treatment of this embodiment but also by various other known techniques, such as insulating rubber seals, glass coach inks, and other desired methods.

After connecting all the weft threads, that is, multilayer solar cell fibers in series and parallel as shown in Figure 2, connect the lead wire to one positive terminal (
p-ss side) and one negative terminal (n-8i side). If external capital is absorbed, an electromotive force will be generated between the positive and negative terminals, and if a load resistor is connected between these terminals, it can be taken out as electric power.

When the adjacent weft and warp yarns are tightly knitted with almost no gaps, this fabric solar cell can generate approximately 120 W/W under direct sunlight in midsummer.
The output of 1rL2 was shown. This cloth-like solar cell is woven in such a dense manner, but it is
Compared to the multilayer coaxial fibrous solar cell disclosed in 2006, the material cost was reduced to approximately 172% because cheaper fibers were used for the warp, and the material cost was reduced to about 172, and the use of a p-81 layered metal electrode and the non-power generation area on the surface side (where the warp and weft intersected Elimination of the shaded fiber portion located below the dot showed a significant effect in that the power extraction efficiency was improved by approximately 40%.

Of course, the advantages of the solar cell of the prior application, that is, high flexibility, mass productivity, easy expansion into a large area, and easy processing into multiple shapes, are retained.

(Part 2) Approximately 500μ in diameter covered with transparent conductive film Snow 51
81 amorphous layers were formed on glass fibers 30 of 30 m by using a well-known glow discharge method. The pressure inside the high-frequency discharge vessel was set to α1~10'l'orr during discharge.
On the Oa 31, a PHs-doped n-S 1 layer 32 of about 1
2pm, then undoped 1-St on n-8152
The layer 33 has a thickness of about α6 pm, and furthermore, B, H, doped p-
The st layer 54 was deposited to a thickness of approximately α3 μm.

The high frequency input power is 10-2~1Q-' W/(Ilk
It was set as 2. The formation of these multilayer S1 films requires two
A rotating shaft of a book was introduced, and the fiber was wound little by little from one shaft to the other. This amorphous multilayer 81 solar cell has a forbidden band width of 1.7 to 1.8 tV and is reddish brown and translucent to external light. p-st layer 34
An In'J bond 65 having a width of 600 .mu.m was wrapped thereon as in Example (Part 1) and tightly wound at a pitch of about 3 scratches to form a spiral conductive wire. When this is heated to about 200°C for a short time, an In-Si alloy is formed, and In-! J
The bond 35 is welded to the p-st layer 64. In ribbon 35
The welded area becomes opaque to outside light. Also In
The p-81 region immediately below the 1J bond 35 is crystallized from an amorphous state to form a microcrystalline region. This microcrystalline region has a conductivity about two orders of magnitude higher than other amorphous regions, and is effective in reducing conduction loss of generated carriers.

After that, a transparent synthetic resin liquid f is applied to this multilayer structure fiber.
: After coating and drying, a transparent insulating layer 36 with a thickness of several μm was formed on the surface. The structure of the obtained multilayer solar cell fiber is shown in FIG.

This translucent multilayer structure solar cell fiber was used as the warp yarn, and glass fibers with a diameter of about 500 μm were used as the weft yarn, and were knitted alternately in the vertical and horizontal directions to produce a cloth-like solar cell. In this case, the yarns were knitted tightly with almost no gaps between adjacent yarns. After cutting this cloth into an appropriate size, the Snug electrode layer 31 and the In1J bond layer 35 are exposed only at one end of the warp as in the previous embodiment, and connected in series and parallel to form one positive terminal and one negative terminal. summarized in. Next, the entire fabric battery was immersed in a transparent plastic solution, pulled up and dried, and the surface was covered with a transparent insulating film. Such surface retention is, for example, 5ins.
YaTi01+ At! Ox Any transparent oxide insulating film formed by sputtering or chemical vapor deposition will serve the purpose, but it is inferior to the organic coating as in this embodiment in terms of manufacturing cost and mass productivity.

The fully plastic-coated multilayer fabric solar cell has sufficient flexibility because the plastic layer on the surface is thin. This training surface was lined with an external light reflective cloth made of white opaque synthetic fiber.

When exposed to direct sunlight in midsummer, this fabric solar cell will produce approximately 12
It generated a power of 5 W/m2. This is thought to be due to the fact that external light penetrates to the back surface of the translucent multilayered solar cell fiber and is reflected by the reflective cloth on the back surface, so that the entire surface of the solar cell fiber contributes to power generation. Since the solar energy conversion efficiency of the amorphous St solar cell used in this example was about 6 cm, it can be seen that an increase in the effective surface area led to a significant increase in power generation capacity.

In addition, when forming the p-type amorphous layer by the glow discharge carried out in the above ii2 disaster, if C3 is mixed with the base gas 5IH4, the p-8i1-1Cx layer is deposited on the layer 1-81. The forbidden band width of 511-xCx is wider than that of St, and the transparency of the p layer is further increased, so the absorption efficiency of sunlight is also increased, and the energy conversion efficiency of this heterojunction type multilayer solar cell fiber is higher than that of amorphous Sl. 8-9 from 6% of solar cells
It was confirmed that the rice was even improved.

(Part 6) A multilayer solar cell fiber was made as shown in Figure 1. However, in this case, the core wire 1 is not a Ni wire but has a diameter of approximately 1.2 m.
carbon fiber was used. Also, the p-si layer 205
The metal electrode placed on top is the Sn ribbon layer 20 of the previous example.
A straight Ag layer was used, which was different from 2. To form the Ag1t electrode layer on the p-Si layer 203, a thin groove-shaped tank is filled with an electroless Ag plating solution and heated, and the carbon fiber wire with the S1 layer including the p-n junction is coated with the p-Si layer 203. - It is sufficient to run the groove-shaped tank in the longitudinal direction so that a part of the surface of the -st layer 2030 is immersed in the plating solution. In this example, the width is approximately 100 μm.

Thickness approximately 200OA (D Ag x drive electrode cal-
81 was formed on the surface of the layer 205 in the longitudinal direction of the core wire. The electrode width can be adjusted by the immersion depth, and the electrode thickness can be adjusted by the plating solution concentration, temperature, and immersion time.

In addition, the electrode metals are Au, Ni, Sn, and C.
Many types such as u can be used. After forming the Ag electrode layer, a transparent insulating plastic coating was applied to the coating surface as in the previous example.

This multilayer structure solar cell fiber 201 is made into a weft thread with a diameter of approximately 1
．． A cloth-like solar cell was formed by using 200 strands of 2 mm transparent amylan fiber as the warp and knitting it alternately in the vertical and horizontal directions. However, in this case, both warp and weft were knitted with a gap of about 1.2 m between adjacent yarns. After cutting to an appropriate size, one end of the weft is exposed as shown in FIG.
Lead wires were attached to the stripe electrode and the carbon fiber electrode for the n-81 layer 204. In the case of carbon fibers, Ag was vapor-deposited on the ends before soldering and soldering was carried out through the Ag. After connecting all the weft threads in series and parallel, the lead wires were combined into one positive and negative terminal. Next, the entire surface of this solar cell was immersed in a transparent plastic liquid and dried to coat the entire surface with a transparent insulating film. As shown in a partial view in FIG. 4, a white synthetic fiber cloth 206 has a diffused reflection surface with a slight gap on the back side of the cloth solar cell.
The fabric solar cell was stretched and exposed to direct midsummer sunlight.

Direct sunlight is not only absorbed by the different surfaces of the fabric solar cell and converted into electricity, but also enters the diffused reflection surface of the white synthetic fiber cloth 206 in a stripe pattern from the weft gap of approximately 1.2 inches in width and is scattered. It is also absorbed by the back side of solar cells. As a result, almost the entire surface area of the multilayer solar cell fiber contributes to electrical conversion. This fabric solar cell exhibited an output of about 100 W/m2. That is, even though the amount of multilayer solar cell fiber used was reduced to 1/2 compared to Example (Part 1), the reduction in power generation remained at about 15%. This can be said to be a very effective method for increasing the effectiveness of fabric solar cell full-surface power generation and reducing material costs.

In addition, in the above example, in addition to opening the weft yarn gap by 1.2 i + 0, transparent amylan fibers (diameter approximately 1
．． In a cloth-like solar cell in which the mechanical strength of the woven cloth was increased by inserting 2 m) without any gaps, the output under direct sunlight in midsummer was about 95 W/m2. This is considered to be the effect of light reflection loss due to the transparent amylan fiber.

(Part 4) A flat Fe wire with a width of 6 mm and a thickness of 200 μm is used as the core wire 1, and p-
An InP polycrystalline thin film layer containing an n-junction was crystallized. In this case, the quartz container 3.7 is filled with In solvent 4.9 and n-
Sn-doped polycrystalline InP block 2 is used as the l-source.
A Zn-doped polycrystalline InP lump 8 was used as the Cp-InP source. As shown in Fig. 1, Fe core wire 1 is filled in a quartz container.
By continuously immersing and running in P-saturated In solution 4.9 mm, n-InP with a thickness of about 4 pm is deposited on the surface of the Fe core wire.
A p-InP layer with a thickness of about 6 pm is laminated in this order. This step is carried out in an N3 atmosphere, and then 1050
When this line is run while flowing steam containing 5 nCts in an oxidizing atmosphere at ℃, 2000 ~
A Snow transparent electrode layer 51 having a thickness of 5000 A is formed. Next, if this wire is immersed in a transparent plastic solution and then pulled up and dried, the Snow film 61 film surface 1 surface insulating film 36 is formed.
is formed.

The thus obtained multilayer structure solar cell fiber was made into warp threads, and transparent nylon threads having a diameter of 3 IIm were used as weft threads, which were knitted alternately in the vertical and horizontal directions. In this case, the special KM yarn was knitted closely so that there were no gaps between adjacent yarns to create a cloth-like solar cell.

This cloth is cut to an appropriate size, and as shown in Figure 2, the electrode layer, that is, the 5nO8 and Fe'X: wires are exposed only at one end of the warp, and the wires are connected in series and parallel to each other. into one positive terminal and one negative terminal. After the surface was treated with an insulating plastic film, the output was measured under direct sunlight in midsummer, and approximately 105 W/TrL2 was obtained. The energy conversion efficiency of the polycrystalline InP solar cell was about 12 yen, but the resistance of the p-InP electrode layer 5n02 film was relatively large and a slight extraction loss was observed. However, it was confirmed that the compound semiconductor fabric solar cell using this flat multilayer structure solar cell fiber also had sufficient flexibility and mechanical strength.

(Part 5) A fabric-like solar cell was fabricated by knitting multilayered St solar cell fibers having a diameter of about 1 inch, which were produced in exactly the same process as in Example (Part 1), in a dense state and alternating length and width. In this case, both the vertical and horizontal lines are solar cell fibers, so after cutting them to an appropriate size,
Each wire was connected in series and parallel at one end on the vertical line side and one end on the horizontal line side as shown in Fig. 2, and finally they were combined into one positive side terminal and one negative side terminal. The entire fabric solar cell was immersed in a transparent plastic solution, pulled up and dried. This fabric solar cell produces approximately 100W under direct sunlight in midsummer.
/m2 output. The reason why the power generation capacity is smaller than that of the first embodiment is considered to be because the light-shielding portions below the vertical and horizontal intersections cause power extraction loss. However, p-s
As a result of connecting the an ribbon layer 202 to the i layer 205 to reduce conduction loss, the power generation capacity is improved by about 15% compared to the case of Japanese Patent Publication No. 58-33718.

On the other hand, when knitting the above multilayer structure St solar cell fiber vertically and horizontally, transparent nylon threads of I IIK diameter, which is the same as the fiber diameter, are mixed and knitted every other thread, cut in series and parallel at one end, and after transparent insulation treatment. In a double cloth structure such as Example (No. 6) in which a light-reflecting white synthetic fiber cloth 206 was arranged on the back side of the solar cell cloth, the output power under direct sunlight was about 88 W/m2.

In the embodiments of the fabric solar cell described above, Sl is used as the photoelectric conversion layer material of the multilayer solar cell fiber.

811-z CX * InP, and the manufacturing method is the "external attachment method" in which the solar cell layer is formed on the outside of the core wire.
only dealt with. However, as the material for this complementary electric conversion layer, C
It is obvious that the present invention can also be applied to compound semiconductor materials such as dS and GaAa. In addition to ``external attachment is the law,'' for example, as described in Japanese Patent Publication No. 5.8-55718, it is ``the law to attach flesh'' to form a solar cell layer inside the hollow core wire.
The fabric solar cell of the present invention can also be obtained by
This is obvious from the structure of the present invention.

The present invention improves the power extraction efficiency and manufacturing cost of fabric solar cells that are extremely flexible, have sufficient mechanical strength, and are easy to increase in area, mass production, and have multiple shapes.1. In particular, it has become possible to significantly reduce material costs.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the multilayer structure solar cell fiber manufacturing process according to the present invention, and FIG. 2 is a diagram showing an embodiment of each line connection in the fabric solar cell type of the present invention (a ),
(b) and (c) show the process for connection. FIG. 3 is a diagram showing the structure of a multilayer solar cell fiber in another embodiment of the present invention, and FIG. 4 is a diagram showing the structure of a fabric in still another embodiment of the fabric solar cell of the present invention. FIG. In the figure, 1 is a conductive core wire, 204 is a crystalline n-8i layer, 203 is a crystalline p-8i layer, 202 is a Sn ribbon layer,
201 is a multilayer structure solar cell fiber, 200 is a transparent synthetic fiber thread, 206 is a white synthetic fiber cloth, 36 is a transparent insulating layer, 35
is In ribbon layer, 30 is glass fin (-core wire, 31
32 is an amorphous n-81 layer, 33 is an amorphous iSi layer, and 54 is an amorphous p-st layer. Patent...Applicant Masahisa Muroki Agent Patent Attorney Tadashi Akimoto Figure 1 Figure 2 (a) Figure 2 (C) Figure 3 5 4■ FDfDDtD+Dgo

Claims (1)

[Scope of Claims] 1. One of the warp and weft of a solar cell, which is made by knitting flexible solar cell fibers having a multilayer structure to give a two-dimensional spread), is connected to the multilayer structure solar cell fiber. Alternatively, the multilayer solar cell fiber may be composed of a mixed fiber of a nuclear solar cell fiber and a non-power-generating fiber, and the other may be composed of only a non-power-generating transparent fiber, and the multilayer solar cell fiber has an outermost transparent electrically insulating layer through which external light enters. and p-n or P-i- provided on the inner periphery of the insulating layer.
The n-junction photoelectric conversion layer, the conductive parts located on both sides of the photoelectric conversion layer and provided in part or all of the skeleton photoelectric conversion layer, and the above p-n or p-1-n through the nuclear conductive part. A fabric solar cell consisting of a means for extracting the electromotive force generated by the bonding to the outside. 2. A solar cell cloth having a two-dimensional spread by weaving flexible solar cell fibers having a multilayer structure, and a light reflecting plate disposed on one side of the solar cell cloth so as not to come into close contact with the solar cell. At least one of the warp and weft of the solar cell is knitted with an appropriate gap between adjacent threads or transparent non-power generating fibers are inserted, and the solar cell fabric is irradiated with light. Part of the outside light reaches the original reflector and is reflected to illuminate the back side of the nuclear solar cell fabric. a p-n or p-1-n junction type photoelectric conversion layer provided on the inner periphery of the core insulating layer; A fabric solar cell comprising: a conductive part; and means for extracting the electromotive force generated at the p-n or p-to-1 junction to the outside via the conductive part. (5) In a solar cell in which flexible solar cell fibers having a multilayer structure are woven together to provide a two-dimensional spread, the solar cell fibers include an outermost transparent electrically insulating layer through which external light enters; p-n or #1p-1 provided on the inner periphery of the insulating layer
-n junction type photoelectric conversion layer, and the p-n or p-i-n
A spiral or straight helical metal electrode layer provided on the bottom surface of the semiconductor layer located close to the electrically insulating layer among the p-type or n-type semiconductor layers forming the junction, and the provision of the metal electrode layer. A conductive portion provided on a part or all of the surface of the semiconductor layer having a conductivity type opposite to that of the semiconductor layer, and the p-n or p-i-
A fabric solar cell comprising means for extracting electromotive force generated at an n-junction to the outside.