Solar cell
First Claim
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1. A solar cell, comprising:
- a first semiconductor region of a first conductivity type;
a second semiconductor region of a second conductivity type in contact with said first semiconductor region so as to form a PN junction therebetween;
a third semiconductor region of the first conductivity type in contact with both said first and second semiconductor regions to form a bypass diode, said third semiconductor region having an impurity concentration higher than the impurity concentration of said first semiconductor region; and
an electrode comprising a plurality of spaced apart elements formed on a surface of said second semiconductor region,wherein said third semiconductor region includes a plurality of island-like regions formed in said second semiconductor region each of said plurality of island-like regions being formed in the spaces between said spaced apart elements of said electrode without contacting said electrode.
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Abstract
A solar cell includes a first semiconductor region of a P type, a second semiconductor region of an N type in contact with the first semiconductor region so as to form a PN junction therebetween, and a third semiconductor region of a P+ type in contact with both the first and second semiconductor regions and having a higher impurity concentration than that of the first semiconductor region.
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Citations
17 Claims
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1. A solar cell, comprising:
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a first semiconductor region of a first conductivity type; a second semiconductor region of a second conductivity type in contact with said first semiconductor region so as to form a PN junction therebetween; a third semiconductor region of the first conductivity type in contact with both said first and second semiconductor regions to form a bypass diode, said third semiconductor region having an impurity concentration higher than the impurity concentration of said first semiconductor region; and an electrode comprising a plurality of spaced apart elements formed on a surface of said second semiconductor region, wherein said third semiconductor region includes a plurality of island-like regions formed in said second semiconductor region each of said plurality of island-like regions being formed in the spaces between said spaced apart elements of said electrode without contacting said electrode. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A solar cell, comprising:
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a first semiconductor region of a first conductivity type; a second semiconductor region of a second conductivity type in contact with said first semiconductor region so as to form a PN junction therebetween; a third semiconductor region of the first conductivity type in contact with both said first and second semiconductor regions to form a bypass diode, said third semiconductor region having an impurity concentration higher than the impurity concentration of said first semiconductor region; and an electrode comprising a plurality of spaced apart elements formed on a surface of said second semiconductor region, wherein said third semiconductor region comprises a plurality of island-like regions formed along a major portion of the periphery of said second semiconductor region and is formed without contacting said electrode. - View Dependent Claims (8, 9, 10, 11)
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12. A solar cell, comprising:
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a first semiconductor region of a first conductivity type; a second semiconductor region of a second conductivity type in contact with said first semiconductor region so as to form a PN junction therebetween; a third semiconductor region of the first conductivity type in contact with both said first and second semiconductor regions to form a bypass diode, said third semiconductor region having an impurity concentration higher than the impurity concentration of said first semiconductor region; and electrodes formed on a surface of said second semiconductor region, wherein said third semiconductor region is formed as a plurality of well-like regions extending from said PN junction into said first semiconductor region and is formed without contacting said electrodes. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification