Schematic of the heterojunction back contact structure. Source: Sharp Solar

Sharp Solar, a subsidiary of Taiwan-based contract electronics giant Foxconn, has reported a 25.09 percent conversion efficiency for a heterojunction back contact (HBC) solar cell on a large-area (6-inch) N-type monocrystalline wafer.

Application of the HBC structure, a fusion of back contact structure, which is utilized in Sharp's high-efficient solar module BLACKSOLAR, formed an amorphous silicon film on the surface of mono-crystalline silicon substrate.

Cell performance was validated by the Japan Electrical Safety & Environment Technology laboratories.