1results about How to "Reduce photoelectric conversion efficiency" patented technology

This invention discloses a lithium-doped crystalline silicon photovoltaic cell, silicon wafer, ingot, and doping method thereof, belonging to the field of photovoltaic cells. By combining appropriate amounts of impurity lithium and impurity boron with lithium to form p-type first lithium silicon, lithium, with an electronegativity of only 0.98, saturates some of the boron atom holes when not exposed to high-energy space radiation. Upon exposure to high-energy space radiation, on the one hand, the outer electrons of lithium are easily attracted by electron traps, objectively passivating the electron traps and "releasing" the boron atom holes. As a result, the majority carrier holes in the p-type silicon material increase, and the conductivity increases instead of decreasing. On the other hand, due to the "accompaniment" of positive lithium ions to the electron traps, the probability of the electron traps capturing photogenerated minority carrier holes is greatly reduced, which is beneficial to improving the photoelectric conversion efficiency of the space cell.