Among all types of solar cells,polycrystalline silicon(Si)solar cells are the most widely produced.The enhancement of the efficiency of polycrystalline Si solar cells may help broaden the deployment of solar cells worldwide.Colloidal quantum dots(QDs)are attractive for use in light down-conversion to enhance the Si solar cells,but their small Stokes shift results in re-absorption losses and the instability of pain QDs that hinder the realization of effectively improve the efficiency of Si solar cells.