TiO2 flowers and spheres for ionic liquid electrolytes based dye-sensitized solar cells

被引：22
作者：
Feng, Liang [1 ]
Jia, Jianguang [1 ]
Fang, Yanyan [2 ]
Zhou, Xiaowen [2 ]
Lin, Yuan [2 ]
机构：
[1] Beijing Univ Chem Technol, Sch Sci, Dept Chem, Beijing 100029, Peoples R China
[2] Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Key Lab Photochem, Beijing 100190, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2013年 / 87卷
基金：
中国国家自然科学基金;
关键词：
TiO2; Flower; Sphere; Photoelectrode; Dye-sensitized solar cells; RUTILE;
D O I：
10.1016/j.electacta.2012.09.037
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Micro-sized 3D branched flower like and sphere TiO2 have been synthesized through a controlled hydrolysis followed by hydrothermal process. The resultant flower and sphere TiO2 were characterized by SEM, XRD, BET and light scattering measurements. Overwhelming anatase and strong light scattering were exhibited for the flower sample. Pure sphere and flower and sphere-mixed (flower/sphere) films were formed and applied as photoelectrodes for dye-sensitized solar cells (DSCs) with both ionic liquid and gelled ionic liquid electrolytes. The devices exhibited considerably enhanced overall energy conversion efficiency in comparison with that of those derived from TiO2 nanoparticles. The superior performances were attributed to their fast electrolyte diffusion and good interfacial contact of TiO2/electrolyte as validated by EIS investigations as well as light scattering. The participation of flowers with the sphere films further improved the electrolyte penetration and light scattering, making the flower/sphere device the most efficient with a low dye loading. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：629 / 636
页数：8
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