摘要
以异丙醇钛为前驱体,采用溶胶-水热方法合成了TiO2纳米晶.采用XRD和TEM等测试技术研究了合成条件对TiO2纳米晶的晶粒度、结晶度以及相转变的影响规律.研究显示,通过控制前驱液的预热处理、水热温度及前驱液浓度等条件,实现了对TiO2纳米晶的晶型、结晶度、晶粒度(10~20nm到120nm)的稳定调控.采用优化实验条件后得到的TiO2纳米晶的水性浆料,使用精确控制膜厚的涂布技术,制作成染料敏化太阳电池(Dye-Sensitized Solar Cells,DSSC).由于制备的TiO2纳米晶具有纯锐钛矿晶型、合适的晶粒大小和良好的结晶性,使DSSC的光电转换效率达到了7.33%,高于同样实验条件下以P25或商业TiO2浆料制作的DSSC的光电转换效率.
TiO2 nanopaticle was synthesised by sol-hydrothermal using titanium isopropoxide as the precursor.The effects of synthesis conditions on grain size,crystallinity and phase transformation between phase-pure rutile and phase-pure anatase,were analyzed by TEM and XRD.It was revealed that crystal-type,crystallinity and crystal-size(from 10-20nm to 120nm) of TiO2 nanoparticles could be controlled by the pre-thermal treatment,hydrothermal temperature and concentration of the precursor.A paste,made from the nanoparticles and water,and by a doctor-blade technology which could control the thickness of the film were utilized to make a Dye-Sensitized Solar Cell(DSSC),which achieved a photoelectric conversion efficiency of 7.33%,as a result of the phase-pure anatase,appropriate grain size and favorable crystallinity of the TiO2 nanoparticles.It exceeded those DSSC's efficiencies made from the commercial paste or P25 paste.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2009年第6期1110-1114,共5页
Journal of Inorganic Materials
基金
国家自然科学基金(10874077
50732004)
江苏省自然科学基金(BK2008252)