Front film contact solar cell

Details Front film contact solar cell Front film contact solar cell

H - Electricity

01

L

H01L 31/0224 (2006.01) H01L 31/04 (2006.01) H01L 31/06 (2006.01) H01L 31/07 (2006.01)

Patent

CA 2068668

FRONT FILM CONTACT SOLAR CELL ABSTRACT OF THE DISCLOSURE A solar cell (20) includes a photovoltaic junction (26) having a front face (24), a back face (32), and a lateral side (42). A first electrical contact (28) for the photovoltaic junction (26) includes a first electrically conductive contact pad (38) located on the back face (32) of the photovoltaic junction (26). A second electrical contact (30) includes a transparent, electrically conductive layer (40) on the front face (24) of the photovoltaic junction (26), a second electrically conductive contact pad (46) located on the back face (32) of the photovoltaic junction (26), and an electrically conductive trace (48) extending from the electrically conductive layer (40) on the front face (24) of the photovoltaic junction (26), over the lateral side (42), and to the second contact pad (46) on the back face (32) of the photovoltaic junction (26). The transparent, electrically conductive layer (40) is preferably a transparent conducting oxide such as indium tin oxide or zinc oxide. The use of the transparent conductive layer (40) on the sun-facing portion of the photovoltaic junction avoids the need for collector grid lines on the front face, which if present shade a portion of the photovoltaic junction and reduce its output.

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