Facet-dependent electrochemiluminescence spectrum of nanostructured ZnO

文献类型： 外文期刊

第一作者： Wang Lei

作者： Wang Lei;Yue QiaoLi;Li HaiBo;Xu ShuLing;Guo LianShun;Zhang XianXi;Wang HuaiSheng;Liu JiFeng;Gao XueXi;Wang WenJun;Liu Peng

作者机构：

关键词： ZnO crystal facet;ECL spectrum;surface state

期刊名称：SCIENCE CHINA-CHEMISTRY （ 影响因子：9.445； 五年影响因子：5.238 ）

ISSN： 1674-7291

年卷期： 2013 年 56 卷 1 期

页码：

收录情况： SCI

摘要： A facet-dependent electrochemiluminescence (ECL) behavior was found for nanostructured ZnO with different dominant exposing planes. The ECL spectrum of nanostructured ZnO was recorded by the emission scan mode with a fluorescence spectrometer and applied to investigate the difference of surface state for different crystal planes. Electronic structure calculations based on density functional theory were used to study the effect of crystal plane on the band structure and density of states. It revealed that the ECL emission was originated primarily from the recombination of electrons from Zn 4s and the hole from O 2p, which could be utilized to study the physical and chemical properties of surface structures of as-prepared nanostructured ZnO. A physical model was suggested to elucidate the differences of ECL spectra. A concept was proposed that the energy released as photons during ECL process of nanocrystalline semiconductor materials will be correlated with the energy level of active sites located at different crystal planes.

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