Patent ID: 8173528

Claim:
A method for manufacturing a gallium-doped monocrystalline silicon solar cell, comprising: classifying sheets of gallium-doped monocrystalline silicon according to resistivity as sheets of gallium-doped monocrystalline silicon having a resistivity greater than or equal to 0.5 Ω-cm, and sheets of gallium-doped monocrystalline silicon having a resistivity greater than or equal to 0.2 Ω-cm and less than 0.5 Ω-cm; texturing and washing the sheets of gallium-doped monocrystalline silicon; diffusing the classified, textured and washed sheets of gallium-doped monocrystalline silicon for 20 to 25 minutes at a diffusion temperature; etching and depositing the diffused sheets of gallium-doped monocrystalline silicon; and metalizing the etched and deposited sheets of gallium-doped monocrystalline silicon, wherein, when the resistivity of the gallium-doped monocrystalline silicon sheet is greater than or equal to 0.5 Ω-cm, the diffusion temperature is 849 to 851° C., and, when the resistivity of the gallium-doped monocrystalline silicon sheet is greater than or equal to 0.2 Ω-cm and less than 0.5 Ω-cm, the diffusion temperature is 840 to 845° C.