Abstract: The solar cells are made of several kinds of nonsingle crystalline silicon that are now obtained in our country. The relations between the characteristic of the materials and the solar cell performances are analysed with the effects of the solar cells. The nonsingle crystalline silicon materials that suit to make solar cells shold be of large grains, (which should be ≥ 1mm²)The grain-boundaries must be perpendicular to the sliced silicon surface, and the resistivity of these materials should be less than 40Ωcm. The demand for the purification of materials may be relaxed. The photovoltaic efficiency of the solar cells made of these kinds of materials is 6-10.5 percent.