The visible luminescent characteristics of ZnO supported on SiO2 powder
作者： Jun Chen , Zhaochi Feng , Pinliang Ying , Meijun Li , Bo Han
DOI: 10.1039/B407913B
关键词:
摘要: In situ laser-induced luminescence spectroscopy is used to study the visible luminescent characteristics of ZnO during preparation process supported on SiO2 by pyrolysis different Zn precursors in N2 or O2 atmosphere. The excitation source 325 nm light, which above band gap (3.37 eV) ZnO. atmosphere, it shown that green (centered at ca. 520 nm), yellow 580 nm) and orange 640 bands appear for produced from zinc acetate, hydroxide nitrate, respectively. After these samples are treated O2, changed into band. On other hand, also found laser irradiation sample could alter behavior beginning decomposition temperature precursors. While this irradiated, gradually a band, intensity finally increases more than 30 times irradiation. However, hardly affects properties after calcination 160 °C. results indicate associated with oxygen vacancies ZnO, electronic state levels responsible changing density green, ascribed high vacancies, moderate less
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