Solar cell and manufacturing method of the same

A method for manufacturing a solar cell, comprising steps of:

• a) providing a semiconductor substrate having a light-receiving side and a back side, wherein a passivation layer is formed on the back side;
• b) applying a second conductive paste comprising an aluminum powder in a prescribed pattern on the back side of the semiconductor substrate, thereby forming an aluminum conductor pattern;
• c) applying a first conductive paste comprising a silver-containing powder in a prescribed pattern on the back side of the semiconductor substrate, thereby forming an silver conductor pattern, at least part of the silver conductor pattern being superimposed on at least part of the aluminum conductor pattern;
• and
• d) firing the silver conductor pattern and the aluminum conductor pattern at the same time, thereby forming an electric contact between the semiconductor substrate and the aluminum conductor pattern by way of fire through in a region where the silver conductor pattern and the aluminum conductor pattern are superimposed,
• wherein the electric contact by way of the fire through is not formed in a region where the silver conductor pattern and the aluminum conductor pattern are not superimposed.

A method for manufacturing a solar cell, comprising steps of:

• a) providing a semiconductor substrate having a light-receiving side and a back side, wherein a passivation layer is formed on the back side;
• b) forming a silver conductor pattern comprising silver-containing powder in a prescribed pattern on the back side of the semiconductor substrate;
• c) forming an aluminum conductor pattern comprising aluminum powder in a prescribed pattern on the back side of the semiconductor substrate, at least part of the aluminum conductor pattern being superimposed on at least part of the silver conductor pattern;
• and
• d) firing the silver conductor pattern and the aluminum conductor pattern at the same time, thereby forming an electric contact between the semiconductor substrate and the aluminum conductor pattern by way of fire through in a region where the silver conductor pattern and the aluminum conductor pattern are superimposed,
• wherein the electric contact by way of the fire through is not formed in a region where the silver conductor pattern and the aluminum conductor pattern are not superimposed.

A method for manufacturing a solar cell, comprising steps of:

• a) providing a semiconductor substrate having a light-receiving side and a back side, wherein a passivation layer is formed on the back side;
• b) forming an aluminum conductor pattern comprising an aluminum powder in a prescribed pattern on the back side of the semiconductor substrate;
• c) forming a silver conductor pattern comprising a silver-containing powder in a prescribed pattern on the back side of the semiconductor substrate, at least part of the silver conductor pattern being superimposed on at least part of the aluminum conductor pattern;
• and
• d) firing the silver conductor pattern and the aluminum conductor pattern at the same time, thereby forming an electric contact between the semiconductor substrate and the aluminum conductor pattern by way of fire through in a region where the silver conductor pattern and the aluminum conductor pattern are superimposed,
• wherein the electric contact by way of the fire through is not formed in a region where the silver conductor pattern and the aluminum conductor pattern are not superimposed.