Evaluation of Graphene Oxide as the Passivation Layer for Si Solar Cells

Graphene oxide, which owns negative fixed charge is evaluated to be the passivation film of commercial Si pn solar cells. The high-temperature co-firing process for contact formation was proved to degrade the passivation effects of GO. Hence, we apply GO on the commercial IBC solar cell directly. The efficiency is increased from 13.4 % to 14.3 %. As long as the GO is not suffering from high-temperature procedures, it can effectively passivate Si solar cells via suppressing recombination of electron-hole pairs.