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SnO_2(110)表面电子结构的第一性原理 被引量:1

Theoretically studying the electrical structure of SnO_2(110) surface with first principle DFT theory
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摘要 应用第一性原理DFT(密度泛函理论)研究了具有(1×1)和(2×1)对称性的SnO2(110)氧化表面、还原表面和缺陷表面的几何结构与电子结构,重点分析了表面氧空穴(O vacancy)对表面电子结构的影响以及对气体分子吸附的影响。研究结果表明,由于表面空穴的存在,SnO2(110)表面能隙中都出现了明显的表面态,由于表面氧的流失而留下来的电荷是产生这些表面态的主要原因,这些电荷主要集中在Sn上和附近的空穴中,与这些电荷相关的轨道是氧化物表面吸附研究的关键。 Calculation on electrical structure of SnO2 (110) surface of ( 1 × 1 ) and (2× 1 ) symmetry with first principle DFT (density functional theory) is performed. The effect of O vacancies on surface electronic structure and future adsorption is emphasized. Due to the exist of the O vacancies, the surface state originating from the electron left by the removal of oxygen appeared at the band gap, these electrons located on the top of tin atoms and O vacancies, and the orbitals associating with these electrons were considered to be the potential site where adsorption would take place.
出处 《功能材料与器件学报》 CAS CSCD 北大核心 2008年第1期59-64,共6页 Journal of Functional Materials and Devices
基金 国家重点基础研究发展计划项目(973)〔2006CB300407〕 国家自然科学基金资助重点项目(90207003)
关键词 SNO2 密度泛函理论 电子结构 能隙 SnO2 density functional theory electronic structure band gap
作者简介 金仁成(1969-),男,博士,副教授,(E-mail:rejin@dlut.edu.cn).
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