染料敏化太阳能电池中多孔电极制备及性能  

Preparation and performance of porous electrodes for dye-sensitized solar cells

作　　者：吴旭苹[1,2] 彭冰霜 刘桂成[3] 辛秦[1] 王新东[1,4] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]北京首钢吉泰安新材料有限公司,北京102206 [3]中国科学院北京纳米能源与系统研究所,北京100083 [4]北京科技大学钢铁冶金新技术国家重点实验室,北京100083

出　　处：《北京科技大学学报》2014年第11期1540-1544,共5页Journal of University of Science and Technology Beijing

摘　　要：将喷涂法应用于制备染料敏化太阳能电池光阳极,具有浆料制备简单、易操作、成本低廉等优势.本文以钛酸丁酯和P25为原料配制浆料,采用喷涂法制备二氧化钛薄膜,选择乙二醇作为造孔剂,探索了乙二醇的最佳加入量.通过对电池I-V曲线,二氧化钛薄膜表面粗糙度、染料吸附量和漫反射谱,以及光阳极的扫描电镜照片和交流阻抗图谱的分析,得到如下结果:当乙二醇与钛酸丁酯的体积比为1∶1时,二氧化钛薄膜的粗糙度最大,即孔隙率和比表面积最大,因此染料吸附量达到1.47×10-7mol·cm-2,电池性能最好,其中开路电压为0.69 V,短路电流为13.0 m A·cm-2,光电转化效率达到5.38%,比不加造孔剂时增加了将近1倍,此时电子的扩散转移电阻也最小.The spraying method, by which slurry preparation is simple, easy to operate and low cost, was applied to prepare photo-anodes for dye-sensitized solar cells. Nano-TiO2 thin films were prepared by a colloidal spray coating technique, and the spraying slurry mainly included tetra-n-butyl titanate （TBT） and P25. Ethylene glycol （EG） was selected as a pore-forming agent to investigate its optimum addition. Through analyzing the I- V curves of the cells, the roughness, dye adsorption amount and diffuse reflection spec-tra of the thin films, and the scanning electron microscopy images and electrochemical impedance spectra of the photo-anodes, we draw the following conclusions. When the ratio of EG to TBT is 1： 1 by volume, the thin film reaches the largest surface area, the dye ad-sorption amount is 1. 47 ＆#215; 10 - 7 mol·cm - 2 , and the cell has the best performance with the open-circuit voltage of 0. 69 V, the short cir-cuit current of 13. 0 mA·cm - 2 , and the photoelectric conversion efficiency of 5. 38% . The photoelectric conversion efficiency is nearly two times that without the pore-forming agent, and now the electron transfer resistance is the least.

关 键 词：染料敏化太阳能电池 多孔材料 电极 二氧化钛薄膜 喷涂 光电转化 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TB383[一般工业技术—材料科学与工程]