Patent ID: 8679889

Claim:
A method for manufacturing a solar cell comprising a silicon substrate, the silicon substrate having a front side configured to face the sun during normal operation and a back side opposite the front side, and the method comprising: providing a silicon substrate having a thin dielectric layer on the back side, and a deposited silicon layer over the thin dielectric layer; forming a layer of doping material over the deposited silicon layer; forming an oxide layer over the layer of doping material; partially removing the oxide layer, the layer of doping material and the deposited silicon layer in an interdigitated pattern; growing an oxide layer while simultaneously raising the temperature to drive the dopants from the layer of doping material into the deposited silicon layer; doping the deposited silicon layer with dopants from the layer of doping material to form a crystallized doped polysilicon layer; depositing a wide band gap doped semiconductor and an anti-reflective coating on the back side of the solar cell; and depositing a wide band gap doped semiconductor and anti-reflective coating on the front side of the solar cell.