掺杂SrTiO_3∶Sm^(3+)的纳米TiO_2光阳极的制备及其光电性能研究  

Preparation and Photoelectric Performance of Nano TiO_2 Photoanode Doping SrTiO_3∶Sm^(3+)

作　　者：李月英[1,2] 郭伟华[1,2] 郝洪顺[1,2] 王丽君[1,2] 秦磊[3] 高文元[1,2] 刘贵山[1,2] 

机构地区：[1]大连工业大学无机非金属材料工程系,大连116034 [2]大连工业大学新材料与材料改性省高校重点实验室,大连116034 [3]大连工业大学国家海洋食品工程技术研究中心,大连116034

出　　处：《人工晶体学报》2015年第6期1563-1568,共6页Journal of Synthetic Crystals

基　　金：辽宁省教育厅重大科技平台(2011-191);国家海洋食品工程技术研究中心开放基金(2012FU125X03);大连市科技平台建设项目(2010-354)

摘　　要：采用水热法制备SrTiO3∶Sm3+纳米粉体,将其作为下转换剂摻杂于纳米TiO2光阳极。用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能谱分析仪(EDS)和荧光光谱仪对SrTiO3∶Sm3+粉体进行表征,并探讨了SrTiO3∶Sm3+摻杂量对染料敏化纳米TiO2太阳能电池光电性能的影响。结果表明:合成的SrTiO3∶Sm3+纳米粉体具有下转换功能,将紫外光转换为592 nm处的黄光,拓宽了光谱响应范围;随着SrTiO3∶Sm3+摻杂量的增加,电池的短路电流密度显著增大,当其摻杂量为10wt%时,电池的暗电流密度最小,光电转换效率最大为4.38%,相对于纯Ti O2效率提高了27%。SrTiO3∶Sm3＋nanopowders were prepared by hydrothermal method,and then being doped in the nano TiO2 photoanode as down-conveter. The as-prepared SrTiO3∶Sm3＋nanoparticles were analyzed by X-ray diffraction,scanning electron microscopy,energy dispersive spectroscopy and fluorescence spectroscopy. The effect of SrTiO3∶Sm3＋nanoparticles doping content on the photoelectric performance of dye-sensitized solar cells（ DSSCs） were also investigated. The results show that the as-prepared SrTiO3∶Sm3 ＋nanoparticles could convert UV-light to yellow light at 592 nm and widen the spectra response range. As the SrTiO3∶Sm3＋doping content increasing, short current density of cells increase significantly,and when the doping content was 10wt%,the dark current density was the smallest,the corresponding efficiency reached 4. 38% which was improved by 27% compared with pure TiO2.

关 键 词：SrTiO3∶Sm3+ 下转换 染料敏化太阳能电池 光电性能 

分 类 号：TM914[电气工程—电力电子与电力传动]