Metal foil metallization for backplane-attached solar cells and modules
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United States of America Patent
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Oct 31, 2017
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app pub date -
Nov 12, 2014
filing date -
Nov 12, 2013
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Abstract
A back contact solar cell is described which includes a semiconductor light absorbing layer; a first-level metal layer (M1), the M1 metal layer on a back side of the light absorbing layer, the back side being opposite from a front side of the light absorbing layer designed to receive incident light; an electrically insulating backplane sheet backside of said solar cell with the M1 layer, the backplane sheet comprising a plurality of via holes that expose portions of the M1 layer beneath the backplane sheet; and an M2 layer in contact with the backplane sheet, the M2 layer made of a sheet of pre-fabricated metal foil material comprising a thickness of between 5-250 μm, the M2 layer electrically connected to the M1 layer through the via holes in the backplane sheet.
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