Surfactant-assisted nanocrystal filling of TiO2 nanotube arrays for dye-sensitized solar cells with improved performance

被引:29
|
作者
Yang, Zuobao [1 ,3 ]
Pan, Dengyu [1 ,2 ]
Xi, Chen [2 ]
Li, Jinghui [2 ]
Shi, Jianwei [1 ]
Xu, Fei [1 ]
Ma, Zhongquan [1 ]
机构
[1] Shanghai Univ, Dept Phys, SHU SolarE R&D Lab, Shanghai 200444, Peoples R China
[2] Shanghai Univ, Inst Nanochem & Nanobiol, Shanghai 200444, Peoples R China
[3] Xinyu Univ, Dept New Energy Sci & Engn, Xinyu 338004, Peoples R China
关键词
Titanium oxide; Nanotube arrays; Nanocrystal; Surfactant; Dye-sensitized solar cells; ELECTRON-TRANSPORT; IMPROVED EFFICIENCY; REDOX ELECTROLYTE; BACK-REACTION; PHOTOANODE; FILMS; NETWORK; RECOMBINATION; NANOPARTICLE; TEMPERATURE;
D O I
10.1016/j.jpowsour.2013.02.037
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Uniform, debris-free, fewer-crack, and highly ordered TiO2 nanotube arrays are prepared by a two-step anodic oxidation method, and a surfactant-assisted vacuum impregnation approach is developed to control the incorporation of sub-10-nm TiO2 nanocrystals into the nanotube arrays. By using the double polymer surfactants of polyethylene glycol and Polyvinyl Pyrrolidone as a sacrificed template, nanocrystal over-agglomeration is prohibited, and thin nanocrystal mesoporous layers are formed on both inner and outer nanotube walls. The application of the nanocrystal filled nanotube arrays as the photoanode for dye-sensitized solar cells has been evaluated. The incorporation of the nanocrystals into the nanotube arrays is found to enhance dye absorption and light-harvesting capacities markedly. As a result, the solar cells based on the filled nanotube arrays hold a short-circuit current density 2.06 times and a power-conversion efficiency 1.94 times higher than those based on the unfilled nanotube arrays. (c) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:10 / 16
页数:7
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