锶掺杂TiO2薄膜电极的制备及其光电性能

采用水热法制备了不同Sr²⁺掺杂量的TiO₂胶体溶液，并以FTO玻璃为基底制备了Sr²⁺掺杂TiO₂薄膜电极。通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)、X射线光电子能谱(XPS)等对Sr²⁺掺杂TiO₂进行表征与分析。结果表明Sr²⁺掺杂抑制了部分锐钛矿型TiO₂ 向金红石型的转变及促进晶粒尺寸的减小，薄膜表面为三维多孔结构，Sr²⁺有效地掺杂到了TiO₂晶格中。薄膜电极的电流密度-电压测试表明，Sr²⁺掺杂有效提高了TiO₂薄膜电子的光电转换效率，其中1% Sr²⁺掺杂量薄膜的转换效率相对于未掺杂的TiO₂薄膜提高了11.5%。

Fabrication and photoelectric properties of Sr2+-doped TiO2 film electrodes

Sr²⁺-doped TiO₂ colloidal solutions with different amount of substance ratios of Sr²⁺/Ti⁴⁺ have been synthesized by a hydrothermal method, and their film electrodes were prepared using fluorine-doped tin oxide (FTO) glass as a substrate. The structure and composition of the Sr²⁺-doped TiO₂ film electrodes were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). XRD results showed that Sr²⁺ suppressed the transformation of TiO₂ from anatase to rutile and promoted a decrease in grain size; SEM showed that the electrodes had a three-dimensional porous structure; XPS confirmed that strontium ions were doped into the TiO₂ crystal lattice. Photocurrent density-voltage measurements indicated that the photoelectric conversion efficiency was effectively improved by doping strontium into the TiO₂ crystal lattice, and the maximum observed increase in photoelectric conversion efficiency relative to the undoped TiO₂ film electrode was 11.5%.