中文摘要：

采用溶胶-凝胶法分别制备出α-Fe_2O_3和Zn Fe2O_4两种胶体,在ITO透明导电玻璃上制备成不同厚度配比的α-Fe_2O_3/ZnFe_2O_4异质结.XRD检测结果表明,复合薄膜两种组分都达到了良好的结晶状态;而且,各复合薄膜体系都呈现出了异质结复合结构的光吸收特性,但光吸收性质差异不明显.稳态表面光电压谱测试结果表明,两组分的厚度分别在1.3μm（α-Fe_2O_3）和1.8μm（ZnFe_2O_4）时达到最佳光伏响应强度.在正的外电场诱导下,组分厚度分别为1.3μm（α-Fe_2O_3）和1.8μm（Zn Fe_2O_4）的复合薄膜具有更为优越的光伏响应特性.

英文摘要：

The colloids of α-Fe_2O_3 and ZnFe_2O_4 have been synthesized with a sol-gel method. Then the heterostructures with different thickness matching for α-Fe_2O_3 and ZnFe_2O_4 were fabricated on ITO conductive glass. The results of XRD show that α-Fe_2O_3 and ZnFe_2O_4 components can be indexed as the well-crystallized structures for each heterostructure. Moreover,all of composite films present the absorption characteristics of the composite structure,but there is not the obvious difference for these absorption spectra. The signals of steady state surface photovoltage spectroscopy indicate that the heterojunction with the thicknesses of 1.3 μm（ α-Fe_2O_3） and 1.8 μm（ ZnFe_2O_4） presents the highest photovoltage signal. Under the same positive bias,there is the highest photovoltage with the thicknesses of 1.3μm（ α-Fe_2O_3） and 1.8 μm（ Zn Fe2O4） under each bias.