JPS60130868A - Amorphous silicon solar cell - Google Patents

Abstract

PURPOSE:To output photovoltaic force from the back, which is not colorless and transparent, of a substrate by inserting a conductive projection formed to one part of an optical incident window frame into an electrode terminal hole for the substrate. CONSTITUTION:Rays projected from an optical incident window 13c pass through transparent electrodes 11, are converted into photovoltaic force in an amorphous silicon layer 10, and are outputted from terminals for the transparent electrodes 11 and metallic electrodes 9. Since conductive projections 13a formed to one parts of an optical incident window frame 13 are inserted into electrode terminal holes 12, photovoltaic force outputted to terminals at the ends of a battery is outputted to the noses of the conductive projections 13a through a metallic film 13b. Since the conductive projections 13a penetrate the electrode terminal holes 12 and protrude to the back, which is not colorless and transparent, of a substrate 8 in an amorphous silicon solar cell, photovoltaic force can be led out easily from the back, which is not colorless and transparent, of the substrate 8.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an amorphous silicon solar cell having a photovoltaic output electrode on the light incident side, and in particular, the photovoltaic force generated in the solar cell is transferred to the back side of a substrate. This relates to a configuration that can be taken out more easily.

Structures of conventional examples and their problems In recent years, solar cells made of amorphous silicon have advantages over single-crystal silicon solar cells in terms of material costs and manufacturing costs. It is attracting attention because it is easy to select the substrate.

In addition, since amorphous silicon solar cells exhibit excellent absorption characteristics under white light, they are widely used as power sources for electronic devices such as calculators that are normally used indoors. All of the 7 recon solar core ponds are formed on a glass sample plate, and light enters from the glass substrate side.

Hereinafter, a conventional amorphous silicon solar cell using a glass substrate will be explained with reference to FIG.

In the figure, 1 is a glass substrate, 2 is a transparent electrode, 3 is an amorphous silicon layer consisting of P layer, ■ layer, and N layer, 4 is a metal electrode, and transparent electrode 2 and metal electrode 4 are connected. One end is used as a photovoltaic output terminal and forms a pair. Also,
Reference numeral 6 indicates a protective resin body, which covers the transparent electrode 2, the amorphous/iricon layer 3, and the metal electrode 4 except for the photovoltaic output terminal.

Since light is incident from the glass substrate 111] 11, the amorphous □ silicon solar cell can output photovoltaic power to the side opposite to the light incident side, and the electronic circuit 6 and output terminal are connected to the electronic circuit board. Electrical connection was made by a leaf spring 7 attached to 6.

On the other hand, as mentioned above, one of the features of amorphous silicon solar cells is that it is easy to select the substrate. When an insulating plate coated on the surface is used as a substrate, light cannot enter from the substrate side. This will be explained with reference to FIG. 2) 1' is a colorless and non-transparent substrate, 2' is a metal electrode, 3' is an amorphous silicon layer consisting of one layer of Pli, and an N layer, and 4' is an amorphous silicon layer composed of one layer and an N layer. They are transparent electrodes, and one end of the metal electrode 2' and the transparent electrode 4' are used as a photovoltaic output terminal and form a pair. Further, 5' is a colorless and transparent protective resin body, except for the photovoltaic output terminal, which includes a metal electrode 2', an amorphous silicon layer 3', and a light electrode 4'.
is covered. Since light is incident from the transparent electrode 4'□ side, photovoltaic force is output from the light incident side, unlike in the case of an amorphous 7-licon solar cell using a glass substrate. Normally, the 'electronic circuit board 6' is located on the substrate 1' side, and in the case of an amorphous silicon solar cell using a glass substrate, it is not easy to output photovoltaic power to the electronic circuit board 4 (board 6'). However, in an amorphous silicon solar cell using a substrate 1' that is not colorless and transparent, if an electronic circuit board 6' is placed on the back side of the substrate 1', electrical contact cannot be established with a leaf spring as in the conventional case. Conversely, if the electronic circuit board 6' is placed on the front side of the amorphous silicon solar cell, it will block the incident light, and in the case of an amorphous silicon solar cell whose substrate is not colorless and transparent, it will be difficult to extract the photovoltaic power. Purpose of the Invention In view of the above-mentioned drawbacks, the present invention aims to provide an amorphous silicon solar cell capable of outputting photovoltaic power on the back surface of a substrate that is not colorless and transparent. Structure of the Invention In order to achieve this object, the amorphous silicon solar cell of the present invention has an electrode terminal hole in a portion of the colorless and non-transparent substrate that corresponds to the output terminal at the end of the amorphous silicon solar cell. A photovoltaic force is extracted from the back surface of the substrate by opening a hole and inserting a conductive protrusion into the electrode terminal hole from the light incident side.

With this configuration, the light incident from the transparent electrode side is
It is converted into photovoltaic force within the amorphous silicon layer composed of N layers, and is outputted from the back surface of the substrate via conductive protrusions from the respective output terminals of the transparent electrode and the metal electrode.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

3, 4, and 5 show an embodiment of the present invention. In Figure 3, 8 is colorless and not bright, 11 (
For the plate, it is possible to use a four-sided thermoplastic film such as polyimide, a ceramic such as alumina, or an insulating plate whose surface is coated with heat-resistant resin or ceramic on the surface of an aluminum or stainless steel plate. The present invention is effective even when a colorless transparent substrate is used to create a battery having the same structure as the present invention. 9 is a metal electrode, which is formed to obtain ohmic contact with the amorphous silicon layer. The materials include iron, molygden, chromium, nichrome, nickel, titanium, tungsten, aluminum/platinum,
Metals such as stainless steel are used. Moreover, its thickness is 0.5 to several μm. 1o is an amorphous silicon layer,
Consists of P layer, ■ layer, and N layer, the thickness of which is 0.6 to 0.
．． 7μ772 11 is a transparent electrode, In2O
3/5n02 etc. are used, and the thickness is 600~
There are 2,000 people.

12 is a conductive protrusion 13 attached to the light incidence window frame 13;
An electrode terminal hole into which & is inserted is made in the battery terminal terminal and the corresponding board. Its shape is not limited to circular,
It can be of any shape. 13 is a light incident window frame. 13 will be further explained with reference to FIG. 4. 513a is a conductive projection, and 13b is a metal electrode 9 or a transparent electrode 1.
This is a metal film for making electrical contact with the protrusion 13a. Further, 13C is a light entrance window. The conductive protrusion J', a 13 a is the protrusion of the light incident window frame 13! Metals such as aluminum, silver, copper, nickel, platinum, and gold are attached to the surface at 1°C by vapor deposition, physical methods such as sputter shielding, or chemical methods such as electroless plating to impart electrical conductivity. .

Further, the metal film 13b is also formed in exactly the same manner as the conductive protrusion 13a. Naturally, the metal film on the surface of the conductive protrusion 13a and the metal film 13b are formed at the same 1L'j,
Electrical contact is established.

The operation of the amorphous silicon solar cell configured as described above will be described below.

First, the light incident through the light incidence window 13C is transmitted to the transparent electrode 1.
1 , it is converted into photovoltaic force inside the amorphous silicon layer 10 and output from the terminals of the transparent electrode 11 and the metal electrode 9 . In FIG. 6, the conductive protrusion 13a is connected to the electrode terminal hole 12.
The photovoltaic force outputted to the terminal at the end of the battery is outputted to the tip of the conductive protrusion 13a through the metal film 13b. , conductive protrusion 1
3λ penetrates through the electrode terminal hole 12 and comes out on the back side of the non-colorless and transparent substrate 8 of the amorphous 7-licon solar cell.
Since the photovoltaic force is not colorless and transparent, it can be easily taken out from the center of the plate 8.

In this way, according to Honjitsu JA example, electrocardiogram H = protrusion 132L
By penetrating through the electrode terminal hole 12, the output of the amorphous/licon yogami i'lb is not completely colorless JM bright 1 (can be easily taken out from the back of the board, and it is different from the conventional core 1 (L
It is possible to easily make electrical contact with the circuit in electronic devices such as In addition to making it easier to position and fix the silicon solar cell, it also provides the effect of preventing positional displacement.

Effects of the Invention As described above, the present invention enables photoactivation by inserting a conductive protrusion provided on a light incident window frame into an output electrode terminal and an electrode terminal hole made in a corresponding substrate. Electric power can be extracted from the back side of the substrate, making it possible to connect to an electronic circuit board in the same way as a conventional amorphous silicon solar cell using a glass substrate. Further, since the protrusion is inserted into the electrode terminal hole, there are effects such as positioning, fixing, and preventing displacement of the amorphous silicon solar cell itself. In particular, for flexible substrates such as heat-resistant resin films or insulating metal plates coated with heat-resistant resin, it is necessary to position not only in the qf direction but also on curved surfaces and to prevent misalignment.11. 4. A simple explanation of the drawings: Figure 1 is a configuration diagram of a conventional amorphous silicon solar cell using a glass substrate, Figure 2 is a colorless and transparent solar cell. 1 (Block diagram of an amorphous silicon solar cell using a plate, Figure 3 is not colorless and transparent in the embodiment of the present invention), (Block diagram of an amorphous silicon solar cell using a plate, Figure 4) The figure shows the configuration of the incident light window frame according to the present invention. Board, 9...
・Metal electrode, 1O...Amorphous silicon layer, 11
...Transparent electrode, 12... Electrode terminal hole, 1
3... Light incidence window frame, 13a... Conductive protrusion, 13b... Metal film, 130...
Light entrance window.

Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] A colorless and non-transparent substrate, an amorphous silicon layer composed of a P layer, 1 layer, and an N layer, a metal electrode and a transparent electrode each having an output terminal at the end, and an output terminal at the end of this wood. A protective transparent resin body that covers the entire surface except for the output terminal portion, and
A light incidence window frame is provided, a conductive protrusion is formed on a part of the light incidence window frame, and the conductive protrusion is inserted into the electrode terminal hole to generate photovoltaic light from the back surface of the amorphous silicon solar cell substrate. An amorphous silicon solar cell configured to output electricity.