Solar cell and method of making same

Details Solar cell and method of making same Solar cell and method of making same

H - Electricity

01

L

H01L 31/04 (2006.01) H01L 31/0224 (2006.01) H01L 31/18 (2006.01)

Patent

CA 2087707

2087707 9222928 PCTABS00018 An improved solar cell of the type including a semiconductor substrate (2) having a shallow p-n junction (3) adjacent its front surface (4), a rear electrode (6) affixed in adherent mechanical and electrical contact with the rear surface (7) of the semiconductor substrate (2), and a front generally grid-shaped electrode including an array of narrow, elongate, parallel fingers (10) and at least one bus bar (13) extending at right angles to the fingers in electrical contact therewith affixed in mechanically adherent and low resistance electrical contact with the front surface (4) of the semiconductor substrate (2). The improvement includes the removal of the bus bar portion (13) of the front grid-shaped electrode from intimate mechanical and electrical contact with the front surface (4) of the semiconductor substrate. The improvement increases the open circuit voltage and efficiency of the solar cell, and allows the bus bar portion (13) of the grid shaped electrode to be formed of materials different from the finger portions (10) of that electrode thereby providing cost advantages and design flexibility without detriment to solar cell efficiency. A method of making the improved solar cell also is disclosed.

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