Solar cell element and solar cell module
First Claim
1. A solar cell element comprising:
- a semiconductor substrate;
an antireflective film formed on a light-receiving surface of the semiconductor substrate;
a surface electrode formed on the light-receiving surface of the semiconductor substrate;
a back surface electrode formed on a non-light receiving surface of the semiconductor substrate;
a first solder layer covering the surface electrode; and
a second solder layer covering the back surface electrode, wherein two or more elements selected from a plurality of elements included in the surface electrode and two or more elements selected from elements included in the first solder layer are each identical to one another.
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Accused Products
Abstract
There is disclosed a solar cell element which comprises a semiconductor substrate 1; an antireflective film 3 formed on a light-receiving surface of the semiconductor substrate 1; a surface electrode 5 formed on the light-receiving surface of the semiconductor substrate 1; a back surface electrode 6 formed on a non-light receiving surface of the semiconductor substrate; a first solder layer 8 covering the surface electrode 5; and a second solder layer 9 covering the back surface electrode 6. Two or more elements selected from a plurality of elements included in the surface electrode 5 and two or more elements selected from a plurality of elements included in the first solder layer 8 are each identical to one another, which are, for example, Ag and Ti or P. The adhesion strength between the electrode and solder can be enhanced by this arrangement.
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Citations
22 Claims
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1. A solar cell element comprising:
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a semiconductor substrate;
an antireflective film formed on a light-receiving surface of the semiconductor substrate;
a surface electrode formed on the light-receiving surface of the semiconductor substrate;
a back surface electrode formed on a non-light receiving surface of the semiconductor substrate;
a first solder layer covering the surface electrode; and
a second solder layer covering the back surface electrode, wherein two or more elements selected from a plurality of elements included in the surface electrode and two or more elements selected from elements included in the first solder layer are each identical to one another. - View Dependent Claims (2, 3, 4)
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5. A solar cell module comprising:
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solar cell elements each including a semiconductor substrate, a surface electrode formed on a light-receiving surface of the semiconductor substrate and a back surface electrode formed on a non-light receiving surface of the semiconductor substrate; and
connection tabs for interconnecting the surface electrode on the light-receiving surface and the back surface electrode on the non-light receiving surface of the solar cell elements, wherein a first solder layer for connecting the surface electrode to the connection tab on the light-receiving surface and a second solder layer for connecting the back surface electrode to the connection tab on the non-light receiving surface have different melting points. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. A solar cell module comprising:
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solar cell elements each including a semiconductor substrate, a surface electrode formed on a light-receiving surface of the semiconductor substrate and a back surface electrode formed on a non-light receiving surface of the semiconductor substrate; and
connection tabs for interconnecting the surface electrodes on the light-receiving surface and the back surface electrodes on the non-light receiving surface of the solar cell elements, wherein the surface electrodes and the back surface electrodes are each connected to the connection tabs by means of a solder, and the connection tabs are provided with through holes at connection areas between the connection tabs and the surface electrodes or the back surface electrodes. - View Dependent Claims (14)
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15. A solar cell module comprising:
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a plurality of solar cell elements;
connection tabs for interconnecting surface electrodes on a light-receiving surface and back surface electrodes on a non-light receiving surface of the solar cell elements; and
a common connection line to which the connection tabs are connected by means of a solder, wherein the connection tabs are provided with through holes at connection areas between the connection tabs and the common connection line. - View Dependent Claims (16)
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17. A solar cell module comprising:
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a plurality of solar cell elements;
connection tabs for interconnecting surface electrodes on a light-receiving surface and back surface electrodes on a non-light receiving surface of the solar cell elements; and
a common connection line to which the connection tabs are connected by means of a solder, wherein the common connection line is provided with through holes at connection areas between the common connection line and the connection tabs. - View Dependent Claims (18)
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19. A solar cell module comprising;
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solar cell elements;
output wires connected to the solar cell elements; and
a terminal box including terminals to which the output wires are connected, wherein the output wires are provided with through holes at connection areas between the output wires and the terminals. - View Dependent Claims (20)
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21. A solar cell module comprising;
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solar cell elements;
output wires connected to the solar cell elements; and
a terminal box including terminals to which the output wires are connected, wherein the terminals are provided with through holes at connection areas between the terminals and the output wires. - View Dependent Claims (22)
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Specification