Traditional formal PEDOT: in PSS/ c-si heterojunction solar cells, the back electrode is in direct contact with c-si. Due to the existence of schottky barrier, the back surface carrier compound is serious and the open pressure is reduced. In addition, PEDOT:PSS film has a strong parasitic absorption of 600-1100] nm wavelength light [10], resulting in short circuit current less than 30 mA/cm2. Chapter on research in this section a - Si: H/c - Si heterojunction (SHJ) solar battery back field and passivation technology applied to the PEDOT: PSS/c - Si heterojunction solar cells (simplified as HSC), reducing the recombination current interface, USES the trans structure at the same time, avoid the PEDOT: PSS passivation film in 600-1100 - nm wavelength light parasitic absorption loss, not only effectively improves the photovoltaic performance of the battery, and improves the stability of the battery.