高等学校化学学报

高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (11): 2581.

• 研究论文 • 上一篇    下一篇

退火对TiO2纳米管/线复合阵列表面光电性质的影响

杨峰1, 蔡芳共1, 柯川1, 赵勇1,2, 程翠华1,2   

  1. 1. 西南交通大学超导与新能源研究开发中心, 材料先进技术教育部重点实验室, 成都 610031;
    2. 新南威尔士大学材料科学与工程学院, 悉尼 2052
  • 收稿日期:2011-05-05 修回日期:2011-08-17 出版日期:2011-11-10 发布日期:2011-10-14
  • 通讯作者: 赵勇 E-mail:yzhao@home.swjtu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 50588201, 50872116)和中央高校基本科研业务费专项资金(批准号: 2009QK46, SWJTU09ZT24)资助.

Effects of  Annealing on the Surface Photoelectronic Properties of TiO2 Nanotube/Nanowire Composite Arrays

YANG Feng1, CAI Fang-Gong1, KE Chuan1, ZHAO Yong1,2*, CHENG Cui-Hua1,2   

  1. 1. Key Laboratory of Advanced Technology of Materials,  Ministry of Education,  Superconductivity and New Energy R & D Center, Southwest Jiaotong University,  Chengdu  610031, China;
    2. School of Materials Science and Engineering, University of New South Wales, Sydney  2052,  Australia
  • Received:2011-05-05 Revised:2011-08-17 Online:2011-11-10 Published:2011-10-14
  • Contact: ZHAO Yong E-mail:yzhao@home.swjtu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 50588201, 50872116)和中央高校基本科研业务费专项资金(批准号: 2009QK46, SWJTU09ZT24)资助.

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被引次数

1

摘要： 采用阳极氧化法制备了TiO2纳米管/线复合阵列. 利用表面光电压谱(SPS)和场诱导表面光电压谱(FISPS)研究了退火对TiO2纳米管/线复合阵列表面光电性质的影响. 结果表明, TiO2纳米管/线复合阵列在晶化前后的导带边缘均出现了束缚激子态, 晶化前由于自建场较弱, 束缚激子态能在正负电场作用下发生不对称偏转; 晶化后, 晶体结构从非晶态变为晶态, 自建场增强, 束缚激子态对正电场敏感并表现出明显的光伏响应, 而在负电场作用下束缚激子态没有任何光伏响应.

关键词: 表面光伏, 场诱导表面光电压谱, TiO2纳米管/线复合阵列, 束缚激子

Abstract: TiO2 nanotube/nanowire composite arrays were fabricated on the Ti substrate via anodic oxidation method. Annealing effects on the surface photoelectronic properties of TiO2 nanotube/nanowire composite arrays were studied by surface photovoltage spectrum(SPS) and the electrical field induced surface photovoltage spectrum(FISPS). The results show   that the bound excitons exist at the edge of conduction band both in as-prepared and annealed TiO2 nanotube/nanowire composite arrays. The build-in field in as-prepared TiO2 nanotube/nanowire composite arrays is weak and the bound excitons can inverse antisymmetrically under external field. After being annealed, TiO2 nanotube/nanowire composite arrays were crystallized from amorphous structure, the build-in field is increased, but the SPS responses related to the bound excitons could exhibit only under positive field.

Key words: Surface photovoltage; , Field induced surface photovoltage; , TiO2 nanotube/nanowire composite array; , Bound exciton

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