TiCl_4水解法制备的阻挡层对染料敏化太阳能电池光电性能的影响  

Effect of Blocking Layers Prepared by the Hydrolysis of TiCl_4 Solution on the Photovoltaic Performance of a Dye-Sensitized Solar Cell

作　　者：陈东坡[1,2] 张晓丹[1] 魏长春[1] 刘彩池[2] 赵颖[1] 

机构地区：[1]南开大学光电子薄膜器件与技术研究所,光电子薄膜器件与技术天津市重点实验室,光电信息技术科学教育部重点实验室,天津300071 [2]河北工业大学信息功能材料研究所,天津300130

出　　处：《物理化学学报》2011年第2期425-431,共7页Acta Physico-Chimica Sinica

基　　金：国家高技术研究发展规划(863)(2007AA05Z436,2009AA050602);国家重点基础研究发展规划(973)(2006CB202602,2006CB202603);国家自然科学基金(60976051);教育部新世纪人才计划(NCET-08-0295)资助项目~~

摘　　要：通过不同浓度的TiCl4溶液水解,在光阳极导电玻璃(FTO)基底上制备了阻挡层薄膜,以此来抑制FTO表面的光生电子与I-3之间的复合反应,采用X射线光电子能谱(XPS)和X射线衍射分别测试了阻挡层薄膜的组成,用场发射扫描电子显微镜(FE-SEM)和紫外-可见(UV-Vis)分光光度计测试了阻挡层的形貌和对光的透过率,在AM1.5和暗环境下分别测试了染料敏化太阳能电池(DSSC)的光电性能.实验结果表明:用此方法可以获得由TiO2粒子组成的阻挡层薄膜;阻挡层薄膜的形貌随着TiCl4溶液浓度的增加而改变,它的厚度随着TiCl4溶液浓度的增加而增加;引入阻挡层后,FTO对光的透过率都会下降;这一薄膜的引入可以提高电池的光电性能,用0.04 mo·lL-1的TiCl4溶液制备的阻挡层对暗电流的抑制作用最为明显,电池在AM1.5的条件下测试,转换效率最高7.84%.Blocking layer thin films were prepared on a conductive fluorine-doped tin oxide（FTO） substrate by the hydrolysis of TiCl4 solution with different concentrations.This blocked the recombination between photoelectrons and I-3.Blocking layer compositions were characterized by X-ray diffraction（XRD） and X-ray photoelectron spectroscopy（XPS）.The surface morphology and transmittance were determined by field emission scanning electron microscopy（FE-SEM） and UV-visible spectrophotometry.The photovoltaic performance of the dye-sensitized solar cells（DSSC） was measured under AM1.5 illumination and under dark conditions.We found that the blocking layers were composed of TiO2 particles.Increasing the concentration of TiCl4 in solution leads to an increase in the blocking layer thickness.Apart from the increase in thickness,the morphology develops as the concentration increases.The transmittance of FTO decreases after the blocking layers deposit on the surface and the blocking layers prepared using 0.04 mol·L-1 TiCl4 solution can suppress the dark current most efficiently and we thus obtained the highest power conversion efficiency of 7.84% under AM1.5 illumination conditions.

关 键 词：染料敏化太阳能电池 阻挡层 TIO2薄膜 暗电流 TICL4 

分 类 号：TM914.4[电气工程—电力电子与电力传动]