Hierarchical TiO2 submicron-sized spheres for enhanced power conversion efficiency in dye-sensitized solar cells

被引：10
作者：
Wang, Hao [1 ,2 ,3 ]
Guo, Zhiguang [1 ,2 ,3 ]
机构：
[1] Hubei Univ, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Wuhan 430062, Peoples R China
[2] Hubei Univ, Minist Educ, Key Lab Green Preparat & Applicat Funct Mat, Wuhan 430062, Peoples R China
[3] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
来源：
MATERIALS RESEARCH BULLETIN | 2015年 / 70卷
关键词：
Solvothermal method; Hierarchical TiO2 submicron-sized spheres; Light scattering; Dye-sensitized solar cells; SCATTERING LAYER; ORGANIC-DYES; FILM; FABRICATION; BEADS; MICROSPHERES; 10-PERCENT; TITANIA; LIGHT;
D O I：
10.1016/j.materresbull.2015.06.037
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Hierarchical TiO2 submicron-sized spheres (TiO2 HSSs) with diameters of 400-600 nm were synthesized by a facile one-step solvothermal method in ethanol solvent. The HSSs composed of nanoparticles of 14 nm have a relatively large surface area of 35 m(2)/g. When applied as the scattering overlayer in dye-sensitized solar cells (DSCs), such TiO2 HSSs effectively improved light harvesting and led to the increase of photocurrent in DSCs. Furthermore, bilayer-structured photoanode also provided fast electron transportation and long electron lifetime as confirmed by electrochemical impedance spectra. As a result, DSC based on P25 nanoparticle underlayer and HSS-2 overlayer exhibited the highest cell efficiency (6.23%) compared with ones with pure P25 (5.50%) or HSS-2 (2.00%) photoanodes. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：928 / 934
页数：7
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