JPS6173386A - Manufacture of photovoltaic device - Google Patents

Abstract

PURPOSE:To fit a photovoltaic device for multikind and small quantity produc tion by forming a plurality of filmy unit photovoltaic elements capable of singly generating electromotive force for operating an electronic apparatus onto the insulated surface of a large-size substrate, electrically coupling output terminals from adjacent unit elements selectively and dividing the substrate while being made to correspond to coupling. CONSTITUTION:The surface of a large-sized substrate 1 consisting of light- transmitting glass and stainless, the surface thereof is insulated and treated, or a polyimide is divided into four in the direction such as X-Y axes directions, and filmy unit photovoltaic elements 2A-2D are loaded in these divided regions. These elements are constituted by photoelectric conversion regions 4a-4c under three-step series connection capable of operating a 1.5V system electronic apparatus by beam projection of 200 lux under a white fluorescent lamp, and plus and minus output terminals 8 and 9 are each fitted previously at the end sections of the regions 4a and 4c. According to such constitution, the elements 2A-2D are connected selectively as required, and the sections are cut, thus manufacturing a photovoltaic device having desired output voltage.

Description

DETAILED DESCRIPTION OF THE INVENTION B) Industrial Application Field The present invention relates to a method for manufacturing a photovoltaic device that generates an electromotive force when irradiated with light.

(b) Conventional technology A variety of materials and structures have been researched and developed as photovoltaic devices that generate electromotive force when exposed to light, but recently, compared to devices using conventional semiconductor single-crystal wafers, unit power generation has been improved. BACKGROUND ART Film-like semiconductors such as amorphous silicon-based semiconductor films, which are suitable for quantity and cost reduction, are used in photoactive layers that contribute to photoelectric conversion, and have been put into practical use and are attracting attention.

Since the above-mentioned photoactive layer is in the form of a film, a support substrate is essential, and there are currently existing photoactive layers that use glass, metal, or heat-resistant polymer resin as the support substrate. When glass is used as a substrate, the substrate is used as a light-receiving surface, and has a structure in which a transparent electrode layer forming a photoelectric conversion region on the light-receiving surface, a single active layer, and a metal electrode layer are sequentially laminated, and a metal substrate or a polymer resin is used. As for the board.

From the substrate side (metal electrode layer), photoactive layer and transparent electrode layer (
translucent or grid electrodes) are deposited in layers.

In the output obtained from a single photoelectric conversion region, the current is proportional to the light receiving area, and the voltage is constant regardless of the area and is usually about 1 V or less. Therefore, in order to obtain a desired voltage, a plurality of such single photoelectric conversion regions must be electrically connected in series.

When the surface of the support substrate has insulation properties.

A plurality of photoelectric conversion regions can be simultaneously manufactured on the insulating surface of such a substrate, and a plurality of photoelectric conversion regions can be connected in series during the manufacturing process.

Normally, the electromotive voltage of the photovoltaic devices connected in series should be set to the operating voltage, and when irradiated with light from the white fluorescent knife 2001ux, a voltage that can operate at least an electronic device with a standard operating voltage of 1.5V should be generated. Approximately three to five stages of photoelectric conversion regions are connected in series.

However, the power supply voltage for electronic devices is not only 1.5V, but also an integral multiple of that, for example, 50V.9.
Also, even if the standard operating voltage is the same.

Electronic devices can be used under low illuminance, and even under the same illumination, electronic devices that require a large current cannot operate if the operating current output from the photovoltaic device is small. , ie.

In order to obtain a high electromotive voltage, the number of series-connected stages must be increased, and in order to obtain a large rated current, the area of one photoelectric conversion region must be increased.

Conventionally, in order to provide such various electromotive voltages and currents, a solution has been to produce a wide variety of photovoltaic devices in small quantities, each with a different number of series connection stages and a different light-receiving area.

(c) Problems to be Solved by the Invention The present invention attempts to solve the above-mentioned decrease in work efficiency caused by the production of multiple models in small quantities.

B) Means for Solving the Problems In order to solve the above problems, the present invention provides a plurality of film-like unit photovoltaic elements that generate an electromotive voltage that can independently operate an electronic device on the insulating surface of a large substrate. After selectively electrically coupling the output ends of adjacent unit photovoltaic devices on the insulating surface to obtain a desired output, the large substrates are separated into individual photovoltaic devices corresponding to the electrical coupling. It has a configuration in which it is divided for each photovoltaic device.

(E) Function: As described above, a plurality of film-like unit photovoltaic elements, which can operate an electronic device by themselves, are simultaneously formed on the insulating surface of a large substrate, and the unit photovoltaic elements are selectively activated. By electrically coupling, a photovoltaic device with arbitrary output power is formed.

(f) Example FIG. 1 shows a state in the middle of the manufacturing method of the present invention.

FIG. 2 is a sectional view taken along the line ■--■ in FIG. 1.

In Figures 1 and 2, (11 is a large substrate with an insulating surface, made of transparent glass, stainless steel with an insulated surface, aluminum, polyimide, etc.); An embodiment in which glass is used as the substrate material and light is irradiated from the substrate side will be described.

(2A) to (2D) are divided into first to fourth regions (3A) to (3D) which are divided into four by the X-axis and Y-axis as shown in FIG. 3 on the insulating surface of the large substrate (11). The film-like unit photovoltaic device (2 people)
~(2D) are each of the first to third photoelectric conversion regions (
4a) to (4c). Each of the first to fifth photoelectric conversion regions (4a) to (4C) has a transparent electrode layer (5a) made of a transparent conductive oxide such as SnOZ%XTO when viewed from the substrate (1) side. ) to (5c), and amorphous silicon-based photoactive layers (6a) to (6C) that are formed by glow discharge in a silicon compound atmosphere and have semiconductor junctions such as pin junctions parallel to the film surface.

Ohmic back electrode layer made of aluminum, chromium, etc.
It has a laminated structure of 7a) to (7c).

In the unit photovoltaic elements (2N) to (2D), the photoelectric conversion regions (4a) to (4c) that are adjacent to each other have transparent electrode layers (5a) (
The back electrode stone (7b) extends from the right side to the exposed part of 5b).
) (7c) are electrically connected in series by overlapping each other.

f81 (91 is the positive and negative output terminals provided at both electrical ends of each of the unit photovoltaic elements (2A) to (2D), and the transparent electrode layer (5c) exposed from the third photoelectric conversion region (4C) The side controls the positive output end (8), and the extended portion of the back electrode layer (7a) of the first power conversion region (4a) controls the negative output end (9).

Each of the unit photovoltaic elements (2A) to (2D) dividedly arranged in the first to fourth regions (3A) to (3D) of the insulating surface of the large substrate (11) is connected to the large substrate (11). It is assumed that a standard operating voltage of 1.5 µA and a standard operating current of 10 μA are output when a white fluorescent knife is irradiated with 200 fux of light through the By dividing the large substrate [11] into four parts along the Y axis, four photovoltaic devices with a standard operating voltage of 1.5 V and a standard operating current of 10 μA are formed under the above light irradiation conditions as shown in Fig. This allows low power consumption electronic equipment with a power supply voltage of 1.5V to operate.

On the other hand, the standard operating voltage of 1.5 V, which is the electromotive voltage of the unit photovoltaic elements (2A) to (2D), is a low voltage.
Double! h, when OV voltage is required.

Adjacent spacing parts of the unit photovoltaic elements (2A) (2B) of the first and second regions (3A) (3B) and the third and fourth regions (
? )C) (3D) unit photovoltaic device (20) (2D)
As shown by hatching in FIGS. 5 and 6, a positive output end (8) and a negative output end (9) adjacent to the boundary on the Y axis in each of the adjacent interval parts are formed with a metal vapor deposited film ( 1
Electrically coupled by 0i. After that, when the large substrate (1) is divided into two along the X axis, two unit photovoltaic elements (2A) (2E) and (20) (2
D) are electrically connected in series and have a standard operating voltage of 6. Two photovoltaic devices can be formed that output Ov (
Figure 7).

Figures 8 and 9 show unit photovoltaic elements (28) to (2D
) is an example in which a current value twice the operating current generated by each of the above is obtained. That is, the first region (3
A) and the output terminals of the same polarity (s+(s+,
91 (91 together, also the 2nd ° 4th area (3B)
Unit photovoltaic element (2B) located at (3D) (2D)
Output ends f81f81 of the same polarity, (91(9) are shown by hatching in both figures, metal vapor deposition film α1oiz,
They are electrically coupled by uaz.

Therefore, unit photovoltaic elements (2A) located in the vertical direction
(2C), (2B) and (2D) are electrically connected in parallel, and when the large substrate (1) is divided into two along the Y axis, the state shown in Figure 10 is obtained, and the metal vapor deposited film on both ends (one plate 3.
Unit photovoltaic elements (2A) to (2D
) Two photovoltaic devices are manufactured which output a standard operating current of 20 μ8, which is −2 times the standard operating current of 20μ8.

(g) Effects of the Invention As is clear from the above description, the present invention simultaneously forms a plurality of film-like unit photovoltaic elements on the insulating surface of a large substrate, which can operate an electronic device by itself. Even a photovoltaic device obtained by dividing into unit photovoltaic elements can operate a low power consumption type electronic device by itself, and it is possible to operate a low power consumption type electronic device by itself, and it is also possible to operate a low power consumption type electronic device by itself. Even if an operating voltage or operating current is required, a photovoltaic device capable of providing any output can be manufactured simply by electrically connecting them in series, parallel, or series-parallel. Therefore, one crop can be shared even to the point of forming a unit photovoltaic element, improving work efficiency.
Suitable for multi-machine, low-volume production.

[Brief explanation of the drawing]

The figures are for explaining the manufacturing method of the present invention, and include 1
The Iti diagram is a plan view of four unit photovoltaic elements formed on a large substrate, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIG. FIG. 4 is a plan view of the unit photovoltaic device, FIG. 5 is a plan view of two unit photovoltaic devices electrically connected in series, and FIG. 6 is a plan view showing the fourth area. 5 is a sectional view taken along the line V[-Vl, FIG. 7 is a plan view of the photovoltaic device divided along the X axis in FIG. 5, and FIG. 9 is a cross-sectional view taken along the line ■-IX in FIG. 8, and FIG. 10 is a plan view of the photovoltaic device divided along the Y axis in FIG. 8. shown respectively. fll...Large substrate, (28) to (2D)...Unit photovoltaic element, (4a) to (4C)...Photoelectric conversion area, (8191...Plus/minus output terminal. Q , 01 (1 plate 2...metal vapor deposition film.

Claims (1)

[Claims] (1) A plurality of film-like unit photovoltaic elements that generate an electromotive voltage capable of operating at least an electronic device by themselves when irradiated with light of 200 lux under a white fluorescent lamp are simultaneously formed on the insulating surface of a large substrate, and arbitrary output After selectively electrically coupling the output ends of adjacent unit photovoltaic devices on the insulating surface in order to obtain the above, the large substrate is divided into individual photovoltaic devices according to the electrical coupling. A method of manufacturing a photovoltaic device characterized by the following.