CoCr_2O_4/TiO_2复合薄膜光阳极的制备及其在DSSC中的应用  

Preparation and application of CoCr_2O_4 /TiO_2 composite film photoanode in DSSC

作　　者：秦颖[1] 胡志强[1] 杨冬雪[1] 

机构地区：[1]大连工业大学纺织与材料工程学院,辽宁大连116034

出　　处：《大连工业大学学报》2014年第1期49-52,共4页Journal of Dalian Polytechnic University

基　　金：国家高技术研究发展计划(863计划)项目(2006AA05Z417);辽宁省教育厅重点实验室科技项目(2008S017)

摘　　要：采用柠檬酸凝胶法制备了尖晶石型CoCr2O4纳米粉体,通过X射线衍射光谱分析了煅烧温度对CoCr2O4纳米粉体晶型及粒度的影响;通过紫外-可见吸收光谱测试了CoCr2O4/纳米粉体和CoCr2O4/TiO2复合薄膜的吸光度。以CoCr2O4/TiO2复合薄膜为光阳极制备了DSSC,应用太阳光模拟器及数字源表测试了DSSC的光电性能,分析了CoCr2O4纳米粉体复合量对电池性能的影响;应用分光计器测试了复合薄膜电池的单色光转换效率。结果表明,CoCr2O4纳米粉体的最佳煅烧温度为700℃,禁带宽度为1.6eV;当CoCr2O4纳米粉体的复合量质量分数为1%时,电池的短路电流和转换效率提高较多,分别提高了61%和55%。CoCr204 nanopowders were prepared by citric acid gel method. The effect of roasting temperature on the crystal structure and particle size was studied by X ray. The absorbance of CoCr204 nanopowders and CoCr204/TiO2 porous composite films were tested by UV-visible absorption spectroscopy, and the band gap of CoCrzO4 nanopowders was calculated. The DSSC was prepared using CoCr204/TiOe composite films as the photoanode. The optical performance of the DSSC was tested by solar simulator and sourcemeter. The results showed that the optimum roasting temperature of CoChO4 powders was 700 ℃and the band gap energy of CoCr204 powder was 1.60 eV, which suggested that it was narrow band gap semiconductor material. Isc and conversion efficiency were increased by 61% and 55%, respectively when the amount of CoCrzO4 powder is 1%.

关 键 词：尖晶石 铬酸钴 DSSC 

分 类 号：TB321[一般工业技术—材料科学与工程]