Heterostructural Composites of TiO2 Mesh−TiO2 Nanoparticles Photosensitized with CdS: A New Flexible Photoanode for Solar Cells
Heterostructural Composites of TiO2 Mesh−TiO2 Nanoparticles Photosensitized with CdS: A New Flexible Photoanode for Solar Cells
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DOI：
10.1021/jp110200s
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发表时间：
2011-04
影响因子：
3.7
通讯作者：
Y. Smith;V. Subramanian
中科院分区：
文献类型：
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作者：
Y. Smith;V. Subramanian
研究了一种利用阳极法生长的TiO 2纳米管（T_NT）作为太阳能电池的柔性电极。采用连续离子层吸附反应（SILAR）法制备了可见光吸收硫化镉纳米晶（CdS）。添加TiO 2纳米颗粒层（T_NT/T_NP）通过TiCl 4暴露和随后的热处理制备的T_NT上的CdS沉积之前，发现增加沉积和利用的CdS相同数量的SILAR循环相比，没有TiO 2纳米颗粒。由于T_NP的沉积，CdS的负载量增加，可见光吸收以及光电化学性能增强。光谱和光电化学研究表明，T_NP对CdS分散性的改善使其光电流比T_NT/CdS体系提高了2倍以上。初步试验表明，该系统性能稳定。
A flexible electrorde utilizing TiO2 nanotubes (T_NT) anodically grown on titanium mesh with TiO2 nanoparticles as an overlying layer for solar cell applications has been investigated. Deposition of cadmium sulfide nanocrystals (CdS) for visible light absorption was carried out through successive ionic layer adsorption and reaction (SILAR) method. The addition of a TiO2 nanoparticle layer (T_NT/T_NP) prepared via TiCl4 exposure and subsequent heat treatment on T_NT before CdS deposition was found to increase the deposition and utilization of CdS for the same number of SILAR cycles as compared to without TiO2 nanoparticles. The increased loading of CdS, as a result of T_NP deposition, enhanced visible light absorbance as well as the photoelectrochemical properties. Spectroscopic and photoelectrochemical studies indicate that the T_NP assisted improved dispersion of CdS results in at least 2-times higher photocurrent than did the T_NT/CdS system. Preliminary tests demonstrate the stable performance of the T...