TiO2@CdS core-shell nanorods films:: Fabrication and dramatically enhanced photoelectrochemical properties
TiO2@CdS core-shell nanorods films:: Fabrication and dramatically enhanced photoelectrochemical properties
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DOI：
10.1016/j.elecom.2006.10.010
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发表时间：
2007-03-01
影响因子：
5.4
通讯作者：
Zhang, Lizhi
中科院分区：
文献类型：
--
作者：
Jia, Huimin;Xu, Hua;Zhang, Lizhi
在本文中，我们采用简单且低成本的化学浴沉积方法制备了TiO2@CdS核壳纳米棒薄膜电极。通过X射线衍射、扫描电子显微镜、透射电子显微镜和紫外-可见光谱技术对核壳纳米棒薄膜电极进行了表征。将这些TiO2@CdS核壳纳米棒电极应用于光伏电池后，我们发现与裸露的TiO2纳米棒和US薄膜电极相比，光电流显着增强。此外，TiO2@CdS核壳纳米棒薄膜电极比美国纳米粒子沉积的TiO2纳米粒子（P25）薄膜电极表现出更好的电池性能。当US纳米粒子在TiO2纳米棒薄膜上沉积约20 min时，在32 mW/cm(2)的光照下，获得了1.31 mA/cm(2)的光电流、0.43的填充因子、0.44 V的开路光电压和0.8%的转换效率。在500 rim的入射波长处获得了5.0%的最大量子效率。我们相信TiO2@CdS核壳异质结构纳米棒是研究光伏电池和光催化领域电荷分离和转移的一些基本方面的优秀候选材料。 (c) 2006 Elsevier B.V. 保留所有权利。
In this paper, we prepared TiO2@CdS core-shell nanorods films electrodes using a simple and low-cost chemical bath deposition method. The core-shell nanorods films electrodes were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and UV-vis spectrometry techniques. After applying these TiO2@CdS core-shell nanorods electrodes in photovoltaic cells, we found that the photocurrent was dramatically enhanced, comparing with those of bare TiO2 nanorods and US films electrodes. Moreover, TiO2@CdS core-shell nanorods film electrode showed better cell performance than US nanoparticles deposited TiO2 nanoparticles (P25) film electrode. A photocurrent of 1.31 mA/cm(2), a fill factor of 0.43, an open circuit photovoltage of 0.44 V, and a conversion efficiency of 0.8% were obtained under an illumination of 32 mW/cm(2), when the US nanoparticles deposited on TiO2 nanorods film for about 20 min. The maximum quantum efficiency of 5.0% was obtained at an incident wavelength of 500 rim. We believe that TiO2@CdS core-shell heterostructured nanorods are excellent candidates for studying some fundamental aspects on charge separation and transfer in the fields of photovoltaic cells and photocatalysis. (c) 2006 Elsevier B.V. All rights reserved.