锶掺杂TiO_2薄膜电极的制备及其光电性能  

Fabrication and photoelectric properties of Sr^(2+)-doped TiO_2 film electrodes

作　　者：付国柱[1] 杨彦秋[2] 邓利[2,3] 魏刚[1] 舒心[4] 方杰[1] 乔宁[1] 

机构地区：[1]北京化工大学化工资源有效利用国家重点实验室,北京100029 [2]北京化工大学生命科学与技术学院,北京100029 [3]厦门北化生物产业研究院,厦门361026 [4]北京化工大学理学院,北京100029

出　　处：《北京化工大学学报（自然科学版）》2013年第5期51-55,共5页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家"863"计划(2009AA03Z802/2009AA03Z803)

摘　　要：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%。Sr2＋-doped TiO2 colloidal solutions with different amount of substance ratios of Sr2＋/Ti4＋ have been syn- thesized 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 Sr＋＋ 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 maxi- mum observed increase in photoelectric conversion efficiency relative to the undoped TiO2 film electrode was 11.5%.

关 键 词：TIO2 掺杂 薄膜电极 光电性能 纳米复合材料 

分 类 号：TQ050[化学工程]