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.
105 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