高等学校化学学报

高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (4): 828.

• 研究论文 • 上一篇    下一篇

种子层对TiO2纳米棒阵列取向生长及界面态的影响

袁占强,  庞山,  程轲,  刘兵,  王广君,  张兴堂,  杜祖亮   

  1. 河南大学特种功能材料教育部重点实验室,  开封 475004
  • 收稿日期:2010-08-17 修回日期:2010-11-29 出版日期:2011-04-10 发布日期:2011-03-09
  • 通讯作者: 杜祖亮 E-mail:zld@henu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:  10874040)和教育部科技创新工程重大项目培育基金（批准号: 708062）资助.

Influence of Seed-layer to Orientation of TiO2 Nanorod Array and Interface State

YUAN Zhan-Qiang, PANG Shan, CHENG Ke, LIU Bing, WANG Guang-Jun, ZHANG Xing-Tang, DU Zu-Liang   

  1. Key Laboratory for Special Functional Materials,  Ministry of Education,  Henan University,  Kaifeng 475004,  China
  • Received:2010-08-17 Revised:2010-11-29 Online:2011-04-10 Published:2011-03-09
  • Contact: DU Zu-Liang E-mail:zld@henu.edu.cn
  • Supported by:

    国家自然科学基金(批准号:  10874040)和教育部科技创新工程重大项目培育基金（批准号: 708062）资助.

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被引次数

31

摘要： 利用水热法制备了金红石相的单晶TiO2纳米棒阵列, 利用扫描电子显微镜(SEM)、Ｘ射线衍射仪(XRD)、紫外可见分光光度计(UV-Vis)以及表面光电压谱仪(SPS)研究了其形貌、结构以及光电性质. 通过不同生长基底对比实验发现F掺杂SnO2导电玻璃基底和种子层对纳米棒阵列的生长起决定作用, TiO2种子层与SnO2:F基底晶格匹配, 有利于晶体外延生长, 使TiO2纳米棒阵列的取向性更强. 根据场调制表面光电压测量结果, 金红石相的TiO2与基底界面处的能带向上弯曲, 在FTO/TiO2界面存在大量界面态, 这些界面态可能成为光生载流子的复合中心. 实验结果表明引入种子层不仅有利于TiO2纳米棒的取向生长, 而且极大地减少界面态, 有望提高电荷的收集效率.

关键词: TiO2阵列, 表面光电压, 界面态, 收集效率

Abstract: The single crystle TiO2 nanorod arrays gown on FTO substrate were prepared by hydrothermal method. The morphology, structure and photoelectric property were investigated with Scanning electron microscope (SEM), X-ray diffraction spectrum (XRD), ultraviolet-visible absorption spectrum (UV-Vis) and surface photovoltage spectrum (SPS) respectively. In the contraction of different arrays with different substrates we found that the FTO substrate had a decisive effect on the growth of nanorod arrays. The lattices of TiO2 seed layer and SnO2:F matched very well, which helped the epitaxial growth and the orientation of nanorod arrays. According to the Field induced surface photovoltage spectroscopy, there was a band upward bending in TiO2 nanorods at the interface of TiO2 and FTO. Introducing seed layer into the process of growth would help the orientation of array, decrease the interface state greatly and provide the potential to increase the collection efficiency of carrier.

Key words: TiO2 array, surface photovoltage spectrum, interface state, collection efficiency

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