▎ 摘　　要

NOVELTY - The utility model claims a spectral absorption enhanced graphene-silicon based solar cell, comprising a back electrode, a back electrode set on the monocrystalline silicon piece, monocrystal silicon sheet is provided with a silicon dioxide layer, the silicon dioxide layer is an annular structure having a through-hole, the silicon dioxide layer through holes exposed on mono-crystalline silicon surface provided with graphene film, graphene layer is provided with silicon nitride film improves the absorptivity of the spectrum. The utility model has simple structure, low cost, stable preparation technique is mature, silicon nitride film can increase absorption rate of spectrum, especially can improve the absorption of long wavelength spectrum, thereby improving the conversion efficiency of graphene silicon-based solar cell.