发明名称 |
Method for the Contact Separation of Electrically-Conducting Layers on the Back Contacts of Solar Cells and Corresponding Solar Cells |
摘要 |
A method for fabricating a solar cell ( 1 ) comprising a semiconductor substrate ( 2 ) is proposed where electrical contacting is made on the back side of the semiconductor substrate. The back side of the semiconductor substrate has locally doped regions ( 3 ). The adjacent regions ( 4 ) exhibit different doping from the region ( 3 ). The two regions ( 3, 4 ) are initially coated with electrically conductive material ( 5 ) over the entire area. So that the conductive material ( 5 ) does not short-circuit the solar cell, the two regions ( 3, 4 ) are covered with a thin electrically insulating layer ( 7 ) at least at the region boundaries ( 6 ). The electrically conductive layer ( 5 ) is separated by applying an etch barrier layer ( 8 ) over the entire surface which is then removed free from masking and selectively e.g. by laser ablation, locally above the insulating layer ( 7 ). The conductive layer is locally removed in the area of the openings ( 9 ) of the etch barrier layer ( 8 ) by subsequent action of an etching solution.
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申请公布号 |
US2008035198(A1) |
申请公布日期 |
2008.02.14 |
申请号 |
US20050665318 |
申请日期 |
2005.10.13 |
申请人 |
INSTITUT FUR SOLARENERGIEFORSCHUNG GMBH |
发明人 |
TEPPE ANDREAS;ENGELHART PETER;MUELLER JOERG |
分类号 |
H01L31/02;H01L21/00;H01L31/068 |
主分类号 |
H01L31/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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