XPS results showed that a stoichiometric CuInS2 film could be obtained when cCu/ cIn ratio in solution was 1.25, for which the absorption coefficient was > 104 cm-1 and the optical band gap Eg was 1.45 eV.

• 通过XPS测定薄膜表面的化学组成证明当cCu2+/cIn3+=1.；25时；CuInS2薄膜接近其标准的化学计量组成。 此时薄膜的吸收系数大于>104cm-1；禁带宽度Eg为1