摘要
采用水热合成技术,以盐酸、去离子水和钛酸丁酯为反应前驱物,在透明导电玻璃（FTO）衬底上合成TiO2纳米花薄膜。采用扫描电子显微镜（SEM）、高分辨透射电镜（HRTEM）和X射线衍射（XRD）对其形貌和结构进行了分析。结果表明在FTO衬底上形成的纳米花是由四方形柱状结构的纳米棒构成的,纳米棒由具有金红石晶型的直径为4-6 nm的几十条单晶纳米线束聚集在一起构成的。研究了以TiO2纳米花薄膜为光阳极制备的染料敏化太阳能电池的光电性能,电池的开路电压、短路电流密度和转换效率均随着反应前驱物中钛酸丁酯的浓度的增加而变小,这是由于纳米花的比表面积随着钛酸丁酯的浓度增加而减少造成的。
TiO2 nano-flowers films on transparent conductive fluorine-doped tin oxide（FTO） substrates were prepared by hydrothermal method using tetra-n-butyl titanate,deionized water and hydrochloric acid as raw materials.The morphology and structure characteristics of samples were analyzed by scanning electron microscopy（SEM）,transmission electron microscopy（TEM） and X-ray diffraction（XRD）.The results revealed that TiO2 nano-flowers are made up of nanorods with flat tetragonal crystallographic planes.Dye-sensitized solar cells（DSSCs） were assembled from TiO2 nano-flowers films.The open-circuit voltage,short-circuit current density and light-to-electricity efficiency of DSSCs obviously decreased as the amounts of titanium butoxide in precursors increasing,which is because of the small specific surface area of nano-flowers resulted by increasing of tetra-n-butyl titanate in the precursors.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2010年第5期1181-1185,共5页
Journal of Synthetic Crystals
基金
广东省科技计划项目(2008B010800004)
