JPS62111480A - Photovoltaic device - Google Patents

Abstract

PURPOSE:To simplify a constitution, to make an effective area large and to improve manufacturing efficiency, by connecting a plurality of photovoltaic elements, which form a continuous annular shape without cut parts, in series on a substrate. CONSTITUTION:A light-transmitting insulating substrate 1 is formed in a disk shape. On the main surface of the substrate, a transparent electrode 2, an amorphous semiconductor layer 3 and a back surface electrode 4 are formed and laminated in this order. Photovoltaic elements A and B in an continuous annular shape without cut parts are arranged at the inside and outside in a concentric pattern. The inner and outer photovoltaic elements A and B are connected in series.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a photovoltaic device in which a plurality of photovoltaic elements are connected in series.

C Prior Art] The current cumulative prior electromotive force T varies slightly depending on the materials used, structure, etc. 5. ``11! Pressure is o under sunlight
, G ~0.8 (V) 42 degrees. Therefore, in order to use it as an alternative energy source such as 屹den i!, it is necessary to connect multiple photovoltaic elements in series. Normally, photovoltaic elements maintain high area efficiency and also improve manufacturing efficiency. When viewed from the surface, it is formed into a rectangular shape, and the series connection 1 is also configured in an upside-down manner in which each of these photovoltaic elements is linearly arranged.

However, with this configuration, there is a problem in that there are significant design restrictions when considering the design effect for consumer use.

For this reason, even in the past, photovoltaic devices have been proposed in which each photovoltaic element has a triangular or annular shape, and the whole is combined to form a circular shape in plan view. Kosho 5l-2GO64).

No. 71 is a schematic bottom view of a conventional circularly configured photovoltaic device, in which photovoltaic elements A, B, C, each having approximately the same annular shape, are arranged in concentric circles on a circular insulating substrate 31. A cut is formed in a part of the annular photovoltaic elements B and C, and a connecting piece 3. Ia, 32a.

32h and 33a are used to interconnect each element in series.

[Problems that the invention attempts to resolve] In the conventional Vi2 as described above, each photovoltaic force, i? The shape of - is circular or annular, but it is not completely circular or annular, and in the case of a circular element, the connecting piece 31a is the main step from one place, and the X9 shape is not completely circular or annular. Element F3. In case of C, one checkpoint is broken, and connecting pieces 32a and 32b are connected from one end of 1t-C.

33.A has a configuration in which each of a is made l4, and in addition to the shape being a crosspiece χ, the four-face bar is small, and when a translucent material such as glass is used as the substrate, Ii these cuts As a result, there were problems such as the fact that it could be seen through from the surface side, which may be inconvenient in terms of design.

! 4-Q Ming was taken into consideration by these circumstances.
The purpose of this is that by making the δ photovoltaic element into a continuous, unbroken ring shape (4i structure is of course simplified, the self-surface viscosity increases, and When a translucent substrate is used, a) a photovoltaic device with an excellent design appearance is provided because there are no cuts;

The photovoltaic power device according to the present invention includes a photovoltaic element having an uninterrupted ring shape or an uninterrupted planar expanse on the main surface of a substrate, and an opening adjacent to the outside of the photovoltaic element and connected in series with the photovoltaic element. The photovoltaic device is characterized by forming a photovoltaic element in the form of a continuous ring without any breaks.

- [Actual ATh Example] The present invention will be specifically explained below based on drawings showing practical examples of the present invention. FIG. 1 is a schematic rear view of the optical 8 power device according to the present invention (hereinafter referred to as the present invention!j27i), and FIG.
It is a cross-sectional view of 11 folk 11i according to the [1-tl line of
In the mouth 1 is a transparent insulating substrate, 2 (2a, 2b, 2e
) i1i3 bright electrode, 3 (3a, 3b) is an amorphous semiconductor layer, and 4 (4, L, ib> is a back electrode).

The transparent insulating substrate l is formed in the shape of a disk, and has a transparent electrode 2 and an amorphous semiconductor F on its main surface (the bottom surface in FIG. 2).
ii 3. The back electrodes 4 are laminated in a uniform order to form a continuous ring-shaped photovoltaic device 82B,
Arranged concentrically outside and inside these.

The outer photovoltaic elements 8 and B are connected in series.

5, a, Sh, and 5b are all lead wires, and the lead wire 5a is a transparent wire exposed at the center to the inner photovoltaic element. a, and the lead wire 5b,
Sits are connected to the transparent electrodes 2c exposed on the outer periphery of the outer photovoltaic force 7-B at positions opposite to the center of the substrate.

Next, a method for manufacturing the apparatus of the present invention as described above will be explained in detail. FIGS. 3(A) to 3(F) are manufacturing process diagrams of the apparatus of the present invention. First, as shown in FIG. 3(a), the entire main surface (lower surface in the drawing) of a translucent insulating substrate 1 made of glass or the like is coated with ink. Retired metal 44i with tin oxide etc. as material Pi
2 to a partial thickness shape ttj9.4. Next, a pattern of resist 1- is printed on the transparent electrode 2 by screen printing 11, and then dried and etched using a mixture of diluted carbon dioxide and hydrochloric acid, hot phosphoric acid, etc., and a third flash is applied. ), circular grooves 2p and 2q with a depth reaching the main surface of the transparent insulating substrate 1 are formed concentrically to form a transparent electrode in a circular shape. 42a, 39 of the annular transparent electrodes 2b and 2e! Fi
Divide concentrically into areas.

Note that the transparent electrodes 2a and 2b can be taken out as photovoltaic elements,
In order to prevent the power from decreasing, the surfaces are set to be approximately equal.

Next, as shown in FIG. 3(c), mJ<transparent electrode 2δ, 2b, 2
Amorphous silicon or the like is used for the main surface of the transparent insulating substrate 1 exposed in the surface of c and in l1lI2ρ, 2Q between these (an amorphous semiconductor consisting of p-type, i-type, n!S2 j3
is formed to a required thickness, and this amorphous rj semiconductor layer 3 is
Furthermore, add back electrode 4 of htf7J to -4 on the surface of gjri.
Form.

Next, using an etching solution consisting of a mixture of phorcyst, solic acid, and nitric acid, the substrate was etched as shown in FIG. 3(d).
In the middle of the fire (a), place a ring 3p so that the small circular transparent core is exposed at the center of the circular electric pole 2a, and place it along the inner edge of the circular transparent 4-pole 2b.゛゛゛　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　, , 2e are formed in a different manner, and the waste quality semiconductor particles 3 are separated into annular quality semiconductors Fii 3m and 3b, respectively, and the back surface 4 is separated into annular back electrodes 4a, 4b, respectively. .Then the third
As shown in the figure (e), first etch it and make it transparent! fi
2a, 2b, 2. Stretch the g-plane 'III' pole of the CAZ calyx over the entire exposed part of the crystalline semiconductor layer 3 until it reaches the same height as the surface of the back electrode 4! Form M layer.

Then, '[il+ again the same photoresist as described.

1 Meiden! using etching solution as shown in Figure 3 (f). A hole 4111 connected to the transparent electrode 2a is formed in the center of fi2a exposed by etching earlier, and also along the inner periphery of the No. 1 quality semiconductor layer 3b. 1
The back electrode 4 is 4a by forming a full 4.9 part of the bulge that is connected to the 4a.

The back electrode to the photovoltaic element located on the inside and the pole of the photovoltaic element B located on the outside are connected in series with each other in series. It is assumed that the device of the present invention is modified to +4.

FIG. 4 is a schematic cross-sectional view taken along the V-V pupil in FIG. Fi!, and the photovoltaic elements Y formed on this day surface and located adjacent to each other inside and outside
-^, 13 are all configured in a polygonal (specifically hexagonal) annular configuration. And.

Correspondence' (Part 5 is given the same number as shown in Fig. 1.2 for explanation.

FIG. 6 shows a further embodiment C of the present invention.

Photovoltaic egg outside ^, both B and flower meandering inside and outside ``
It is formed into a shape (other than the outside is substantially the same as the embodiment shown in Section 1.2 [11] above, and corresponding parts are numbered in between.

4. The shape of each photovoltaic element A, B is limited to the above-mentioned configuration.
Strength! To complete, B can also be multiple circles, triangles, and other various polygons in the shape of 1g.Also, to complete photovoltaics,
) is U9 (not Je, circle, circular, disturbance, etc.)
1rl's mui l! The branched planar spread may be six.

In addition, although the above embodiment has been described for the 11th structure in which a transparent 143-color i-substrate made of glass or the like is used as the substrate S, it is of course possible to use a stainless steel substrate, etc., for example, without looking at the details. .

[・S1. 1.; ノ] In the present invention device, ζ is a continuous f9 shape with no break? ! Since several photovoltaic elements were connected in series on the substrate, adjacent to each other, the total number of 11
1. He has been promoted, and there is still a break, but that's it)
(It is also possible to make oil-faced seeds more attractive, and it is also possible to make them into a symmetrical shape.) Simplify the shape of O:!! l At the same time, it is possible to improve the rate of young production, and at the same time, it also increases the number of lazy young fruits. The invention is ((
This is what makes the effect worse.

[Brief explanation of drawings]

Figure 1 [, j is a schematic sectional view of the device of the present invention, Figure 2 is the first
In the figure, [1-TI line longitudinal cross-sectional view, Figures 3 (a) to (f) are VJ construction process diagrams, Figure 4 is another actual product of the present invention & 1P4
U)P'AK&')A”tMU:!J, Rough, 5
FIG. 6 is a longitudinal cross-sectional view taken through the v-v pupil 22 of r/l Li 4th ia, FIG. 6 is a schematic Tt view showing still another example of the present invention, and FIG. , l schematic /? It is a matter of fact. Standing... Light-transmitting insulating substrate 2.2a, 2b, 2c...
Transparent electrode 3, 3. +, 3'b=-amorphous W'! '4 bodies 4, 4a, 4t+-1 side electrode 5a,, Sb...
・Lee I line h j applicant 3! F Electric Li Shikikai I Agent Patent Attorney Noboru Kono ・4 9 11゛・′-b ,=a ,,l 1. “2S,
zeta
511.2 工 ゆゆみ〆・F 1、) 8.・-2shi9 ・Go15 PaC 43,7 Shirushima Xa, a Hizuke-side, l12shi No. 7

Claims (1)

[Scope of Claims] 1. A photovoltaic element having an uninterrupted ring shape or an uninterrupted planar extension on the main surface of the substrate, and a photovoltaic element having adjacent cuts outside the element and connected in series thereto. 1. A photovoltaic device characterized by forming a photovoltaic device in the form of a continuous ring. 2. The photovoltaic device according to claim 1, wherein the inner photovoltaic element and the outer photovoltaic element are connected so that their electrodes are connected in series over the entire opposing edges. Device. 3. The photovoltaic device according to claim 1, wherein each of the inner and outer photovoltaic elements has a ring shape or a square ring shape. 4. The photovoltaic device according to claim 1, 2 or 3, wherein each of the inner and outer photovoltaic elements includes an amorphous silicon layer as a photoactive layer.