US Patent:
20150129031, May 14, 2015
Inventors:
- Milpitas CA, US
Thom Stalcup - Boulder CO, US
Karl-Josef Kramer - San Jose CA, US
Anthony Calcaterra - Milpitas CA, US
Virendra V. Rana - Los Altos CA, US
Sean M. Seutter - San Jose CA, US
Pawan Kapur - Burlingame CA, US
Michael Wingert - Los Gatos CA, US
International Classification:
H01L 31/0224
H01L 31/18
H01L 31/028
H01L 31/0216
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.
