JPH0334472A - Amorphous semiconductor photovoltaic element - Google Patents

Abstract

PURPOSE:To form an output terminal on the reverse surface of a substrate without increasing the cost of manufacture by a method wherein a flexible material is used as the substrate, a cut is made in the part of the substrate which is located in the vicinity of the output terminal or in the part of the substrate wherein the output terminal is formed, and the output terminal formed on the light-sensing surface side of the substrate is bent along said cut and turned onto the nonlight-sensing surface side of the substrate. CONSTITUTION:Upper electrodes 5 are formed on the top of an amorphous semiconductor layer 4 by ITO evaporation. For lower electrodes 3 and the upper electrodes 5, output terminals 6 disposed on the surface side of a substrate 1 are formed as usual. Moreover, a protecting layer 7 formed by printing resin having an excellent light-transmitting property, e.g. epoxy resin, is provided on the whole ot the uppermost surface except the part of the output terminal 6. The output terminal 6 is made to face the reverse surface 1a of the substrate 1 by forming a cut 8 longitudinally in the part of the substrate 1 being located in the vicinity of the output terminal and by bending the terminal onto the reverse surface 1a side of the substrate 1 along a bending line 9.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an amorphous semiconductor photovoltaic device, and more particularly to an amorphous semiconductor photovoltaic device using a substrate made of a flexible material such as stainless steel or polyimide. The present invention relates to a semiconductor photovoltaic device.

(Prior Art) In recent years, amorphous semiconductor photovoltaic elements using the above-mentioned types of substrates such as stainless steel and polyimide have been widely used. However, since such a board is opaque, the element body and its output terminal must be placed on the front side of the board. In this case, it will be necessary to devise a connection with other electric circuits arranged on the back side of the board. For this reason, conventionally, a lead wire was connected to the output terminal with solder or the like, and the lead wire was extended and connected to the other electric circuit.

However, when the lead wires are connected with solder or the like in this manner, the solder portion is bulky and difficult to incorporate into devices such as watches and calculators.

Therefore, in Japanese Patent Application Laid-open No. 61-134080,
A structure has been proposed in which the output terminal portion has a protruding structure and the protruding portion is bent toward the back side of the board.

(Problem to be Solved by the Invention) However, in the structure proposed in the above-mentioned Japanese Unexamined Patent Publication No. 61-134080, the output terminal portion has a protruding structure. There was a problem that the part between them was wasted and the manufacturing cost of the amorphous semiconductor photovoltaic device increased.

Therefore, an object of the present invention is to provide an amorphous semiconductor photovoltaic device in which an output terminal is formed on the back surface of a substrate without increasing manufacturing costs.

(Means for Solving the Problems) The amorphous semiconductor photovoltaic device of the present invention uses a flexible material as a substrate, and connects an output terminal formed on the light-receiving surface side of the substrate to a point near the output terminal. The device is characterized in that a notch is made in the substrate or in the part of the substrate where the output terminal is formed together with the output terminal, and the device is bent along the notch so as to turn toward the non-light receiving surface side.

(Function) In the present invention, the output terminal itself, which has conventionally been formed on a substrate, is made by making a cut in the substrate portion near the output terminal and bending it along the cut.
The output terminal was formed on the back side of the substrate, that is, on the non-light-receiving surface side.

(Example) Hereinafter, an amorphous semiconductor photovoltaic device according to a preferred example of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a plan view of an amorphous semiconductor photovoltaic device according to a first embodiment of the present invention, and FIG.
FIG.

In this figure, reference numeral 1 indicates a stainless steel substrate, and this substrate 1 has an insulating film 2 on its entire surface and is an insulating substrate. This insulating film 2 can be formed by printing silicone resin, for example. A lower electrode 3 is formed on the substrate 1 by, for example, chromium vapor deposition. On this lower electrode 3, an amorphous semiconductor layer 4 is formed using a plasma CVD apparatus. This amorphous semiconductor layer 4
From the bottom, the P-type layer has a thickness of 50 to 150, and a thickness of 4.
A square layer of 000 to 600 OA and an N-type layer of 200 to 300 Å thick are formed.

Above the amorphous semiconductor layer 4, an upper electrode 5 is provided.
It is formed by O vapor deposition. The lower electrode 3 and the upper electrode 5 are provided with an output terminal 6 disposed on the front surface side of the substrate 1, as in the prior art.

Furthermore, a protective layer 7 is provided on the entire top surface, except for the output terminal 6 portion, which is formed by printing a resin with good translucency, such as an epoxy resin.

For example, as shown in FIG. 3, the output terminal 6 is formed by forming a vertical notch 8 in a portion of the substrate 1 near the output terminal, and forming a notch 8 at the bending line 9 in FIGS. 4(a), (b), ( By bending it toward the back surface la of the substrate 1 in the order shown in C), it is made to face the back surface 1a of the substrate 1.

Incidentally, as shown in FIG. 5, cuts 8 may be made in the transverse direction in the substrate 1 and the output terminals 6, and the parts may be bent at a bending line 9.

In this case, the cut 8 needs to end in the middle of the output terminal 6 as shown.

Next, referring to FIG. 6 and subsequent figures, a round amorphous semiconductor photovoltaic device according to a second embodiment of the present invention will be explained. In the case of this embodiment, as shown in FIG. , make a cut lO on both sides of the output terminal 6 of the board 1, and
By bending at the bending line 11, the output terminal 6 is made to face the back surface 1a of the substrate 1.

In this way, the surface of the round amorphous semiconductor photovoltaic element with the output terminal 6 bent, that is, the light-receiving surface side, is
8, and the back surface, that is, the non-light receiving surface side is shown in FIG.

In this embodiment, other parts and members correspond to those in the first embodiment, so the same reference numerals are given to them and the explanation thereof will be omitted.

(Effects of the Invention) In the present invention, the output terminal itself, which has conventionally been formed on the light-receiving surface of a substrate made of stainless steel, polyimide, etc., is cut into a portion of the substrate near the output terminal, and then the output terminal itself is cut along the cut. By bending it, the output terminal is formed on the back side of the board, that is, on the non-light-receiving surface side by turning it to the non-light-receiving surface side, so that a protruding terminal is formed as disclosed in JP-A-61-134080. Compared to the case where the conventional method is used, it is possible to save a large amount of material, and therefore, the manufacturing cost can also be reduced significantly.

[Brief explanation of drawings]

FIG. 1 is a plan view of an amorphous semiconductor photovoltaic device according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. Figures 4(a), (11), and (C) are enlarged views of the output terminal section showing one example of how to insert the terminal.
FIG. 5 is an enlarged view of the output terminal section showing another example of how to make the notches, and FIG. 6 is a side view showing the procedure for bending the output terminal section in which the notches are made. FIG. 7 is a plan view of a hole-type amorphous semiconductor photovoltaic device according to an example, and FIG. Figure 8 is
FIG. 3 is a schematic rear view of a hole-type amorphous semiconductor photovoltaic device according to a second embodiment, with the output terminal shown in a folded state. 1... Board 6... Output terminal 8, lO・
...Cut 9.1t...Bending wire rod application Taiyo Yuden Co., Ltd. Ri Kitamura Kin - (゛ and 3 other people)

Claims (1)

[Claims] A flexible material is used as a substrate, and an output terminal formed on the light-receiving surface side of the substrate is placed on the substrate near the output terminal, or together with the output terminal on a portion of the substrate where the output terminal is formed.
1. An amorphous semiconductor photovoltaic device characterized in that it is turned to a non-light-receiving surface side by making a notch and bending it along the notch.