Size dependence of Zn 2p 3∕2 binding energy in nanocrystalline ZnO
Size dependence of Zn 2p 3∕2 binding energy in nanocrystalline ZnO
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DOI：
10.1063/1.2198821
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发表时间：
2006-04
影响因子：
4
通讯作者：
Y. Tay;Sean Li;Changyong Sun;Peng Chen
中科院分区：
文献类型：
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作者：
Y. Tay;Sean Li;Changyong Sun;Peng Chen
电子结构和光学带隙的尺寸依赖性的实验结果表明，纳米ZnO具有两个束缚态，其能量低于体ZnO。结合态的这种尺寸依赖性与单个Zn离子的断裂键的数量有关，这可以通过纳米级的尺寸减小来修改。改变表面和底层上的断裂键的数量可能导致纳米ZnO的电子结构的可能的复杂化，从而引起不同的光学性质，而不是与量子尺寸效应相关的光学性质。
The experimental results in size dependence of electronic structure and optical band gap show that the nanocrystalline ZnO has two binding states which energies are lower than that of the bulk ZnO. This size dependence of binding states is associated with the number of broken bonds of the individual Zn ion, which could be modified by size reduction in nanoscale. Varying the number of broken bonds on the surface and the underneath layer might result in possible complications in the electronic structure of the nanocrystalline ZnO, thus giving rise to different optical properties rather than those relating to quantum size effects.