SOLAR CELL AND METHOD FOR MANUFACTURING THE SAME
First Claim
1. A solar cell comprising:
- a crystalline semiconductor substrate containing impurities of a first conductive type;
a tunnel layer positioned on the crystalline semiconductor substrate;
a semiconductor layer formed on the tunnel layer, the semiconductor layer having a crystallinity less than a crystallinity of the crystalline semiconductor substrate, the semiconductor layer including a first doped region of a second conductive type opposite the first conductive type and a second doped region containing impurities of the first conductive type at a higher concentration than that of the crystalline semiconductor substrate;
a first electrode connected to the first doped region; and
a second electrode connected to the second doped region,wherein at least one of the first doped region or the second doped region includes a first portion having a first specific resistance and a second portion having a second specific resistance, the first specific resistance being larger than the second specific resistance.
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Abstract
A solar cell and a method for manufacturing the same are discussed. The solar cell includes a crystalline semiconductor substrate containing impurities of a first conductive type, a tunnel layer positioned on the crystalline semiconductor substrate, a semiconductor layer which is formed on the tunnel layer, has a crystallinity less than the crystalline semiconductor substrate, and includes a first doped region of a second conductive type opposite the first conductive type and a second doped region containing impurities of the first conductive type at a higher concentration than that of the crystalline semiconductor substrate, a first electrode connected to the first doped region, and a second electrode connected to the second doped region.
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Citations
20 Claims
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1. A solar cell comprising:
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a crystalline semiconductor substrate containing impurities of a first conductive type; a tunnel layer positioned on the crystalline semiconductor substrate; a semiconductor layer formed on the tunnel layer, the semiconductor layer having a crystallinity less than a crystallinity of the crystalline semiconductor substrate, the semiconductor layer including a first doped region of a second conductive type opposite the first conductive type and a second doped region containing impurities of the first conductive type at a higher concentration than that of the crystalline semiconductor substrate; a first electrode connected to the first doped region; and a second electrode connected to the second doped region, wherein at least one of the first doped region or the second doped region includes a first portion having a first specific resistance and a second portion having a second specific resistance, the first specific resistance being larger than the second specific resistance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for manufacturing a solar cell, the method comprising:
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preparing a crystalline semiconductor substrate containing impurities of a first conductive type; forming a tunnel layer on the crystalline semiconductor substrate; forming an intrinsic semiconductor layer on the tunnel layer; diffusing impurities of a second conductive type opposite the first conductive type into the intrinsic semiconductor layer to form a first doped region having a crystallinity less than a crystallinity of the crystalline semiconductor substrate; and diffusing impurities of the first conductive type into the intrinsic semiconductor layer to form a second doped region having a crystallinity less than the crystallinity of the crystalline semiconductor substrate, wherein the forming of the first doped region or the second doped region includes forming an impurity layer containing impurities of the second conductive type or impurities of the first conductive type at the intrinsic semiconductor layer, irradiating a laser onto the impurity layer, and diffusing the impurity layer. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method for manufacturing a solar cell, the method comprising:
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doping a second impurity layer of a second conductive type opposite a first conductive type on a back surface of a semiconductor substrate containing impurities of the first conductive type to form a first doped region; doping a first impurity layer containing impurities of the first conductive type on the back surface of the semiconductor substrate to form a second doped region; and additionally doping the first impurity layer or the second impurity layer on the first doped region or the second doped region to form a first portion or a second portion each having a different impurity doping concentration, wherein an impurity doping concentration of the first portion is lower than an impurity doping concentration of the second portion. - View Dependent Claims (20)
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Specification