高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (12): 2353.

• 研究简报 • 上一篇    下一篇

活性粒子吸附对ZnO纳米粒子表面光伏特性的影响

王雪松, 王德军, 肇启东, 谢腾峰   

  1. 吉林大学化学学院, 长春130023
  • 收稿日期:2004-05-10 出版日期:2004-12-24 发布日期:2004-12-24
  • 基金资助:

    国家自然科学基金(批准号:20273027);教育部博士学科点基金(批准号:020183008);吉林大学纳米重点科研基金资助

Influence of Active Particle Adsorption on Surface Photovoltage Properties of ZnO Nanoparticle

WANG Xue-Song, WANG De-Jun, ZHAO Qi-Dong, XIE Teng-Feng   

  1. College of Chemistry, Jilin University, Changchun 130023, China
  • Received:2004-05-10 Online:2004-12-24 Published:2004-12-24

关键词: ZnO纳米粒子, 光电气敏, 表面光伏, 表面态

Abstract: Surface photovoltage spectrum(SPS), field-induced surface photovoltage spectrum(FISPS) and gas probe techniques are used together to study surface photovoltage(SPV) property of ZnO nanoparticles. The SPS of ZnO nanoparticles consists of two parts, band-to-band transition(P1,P2) and surface states transition(P3). The result shows that the SPV response is mostly attributed to the built-in field formed by active adsorbates, most of which is O2. Competitive adsorption of O2 and H2O exists on ZnO surface. They play different roles in the influence on SPS. The Adsorption of O2 weakens P3, whereas H2O enhances P3. And the velocity of adsorption and desorption of O2 on the surface is significantly faster than H2O. The adsorption and desorption of H2O may be correlated with the adjustment of surface structure.

Key words: ZnO nanoparticles, Photo-electric gas-sensitivity, Surface photovoltage, Surface state

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