Fabrication of Three-Dimensionally Ordered Macroporous TiO2 Films with Enhanced Photovoltaic Conversion Efficiency
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- 作者：Yang Chen (1) (2)
Zhaofang Tang (1)
Zhigang Chen (3) - 关键词：Colloidal crystal template ; Three ; dimensionally ordered macroporous TiO2 ; Photoanode ; Dye ; sensitized solar cell
- 刊名：Journal of Inorganic and Organometallic Polymers and Materials
- 出版年：2013
- 出版时间：July 2013
- 年：2013
- 卷：23
- 期：4
- 页码：839-845
- 全文大小：459KB
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Zhaofang Tang (1)
Zhigang Chen (3)
1. School of Materials Science and Engineering, Changzhou University, Changzhou, 213164, Jiangsu, China
2. Key Laboratory of Advanced Metallic Materials of Changzhou City, Changzhou University, Changzhou, 213164, Jiangsu, China
3. Department of Chemistry and Bioengineering, Suzhou University of Science and Technology, Suzhou, 215011, Jiangsu, China - ISSN：1574-1451
文摘
Negative-charged polystyrene (PS) microspheres were prepared through a soap-free emulsion polymerization method using potassium persulfate as initiator. Three-dimensionally ordered macroporous TiO2 films were fabricated using the high-quality PS colloidal crystals templates obtained via a horizontal deposition method. The as-prepared macroporous TiO2 films were applied as the photoanodes in dye-sensitized solar cell (DSSC). The microstructure of the products were characterized by X-ray diffractometer, fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy and nitrogen adsorption–desorption analyzer. The results showed that the macroporous TiO2 films replicated well the 3D ordered structure derived from PS colloidal crystal templates and revealed a relatively large specific surface area (69.99?m2/g), which could increase the capacity of TiO2 film anode for absorbing dyes and scattering light. The photocurrent–voltage (I-em class="a-plus-plus">V) characteristics of DSSC were measured by a digital source meter under simulated solar light. The results indicated that the introduction of an ordered macroporous TiO2 interfacial layer increased the photovoltaic conversion efficiency, which was improved by 68?% from 3.61 to 6.08?%, as compared to a device using a bare P25 TiO2 photoanode. Our results showed that the hierarchically ordered macroporous TiO2 bilayer films photoanode for DSSC could be helpful to improve the photovoltaic conversion efficiency.