| 溶胶-凝胶法制备的MgxZn1-xO纳米薄膜结构和光学性质 |
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| 引用本文： | 李金华,张昕彤,刘益春,郭薇,白玉白,李铁津. 溶胶-凝胶法制备的MgxZn1-xO纳米薄膜结构和光学性质[J]. 高等学校化学学报, 2003, 24(10): 1830-1833 |
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| 作者姓名： | 李金华 张昕彤 刘益春 郭薇 白玉白 李铁津 |
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| 作者单位： | 1. 东北师范大学理论物理研究所, 长春 130024;2. 中国科学院激发态物理重点实验室, 长春光学精密机械与物理研究所, 长春 130021;3. 吉林大学化学学院, 长春 130023 |
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| 基金项目： | 国家自然科学基金，60176003， |
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| 摘 要： | 用溶胶-凝胶法制备了不同组分的MgxZn1-xO薄膜.X射线衍射结果表明,薄膜为具有六角纤锌矿结构的纳米薄膜,晶粒尺寸3～5nm,随着Mg进入ZnO晶格,其晶格常数变小.紫外-可见吸收光谱表明,随着Mg含量的增加带隙变宽,自由激子吸收峰明显蓝移.室温光致发光光谱由很强的且与氧空位相关的深能级缺陷发光和较弱的紫外激子发光组成,激子发光强度和缺陷发光强度比随x的增大而减小,表明Mg原子进入ZnO晶格会引起深能级缺陷的增加.Mg0.03Zn0.97O薄膜经700℃热氧化后,紫外与可见发光强度比达到30.
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| 关 键 词： | 溶胶-凝胶法 MgxZn1-xO纳米薄膜 X射线衍射 光致发光 |
| 文章编号： | 0251-0790(2003)10-1830-04 |
| 收稿时间： | 2002-03-29 |
| 修稿时间： | 2002-03-29 |
Structural and Optical Properties of MgxZn1-xO Nanofilms Prepared by Sol-gel Method |
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| LI Jin-Hua ,ZHANG Xin-Tong ,,LIU Yi-Chun ,,GUO Wei ,BAI Yu-Bai ,LI Tie-Jin. Structural and Optical Properties of MgxZn1-xO Nanofilms Prepared by Sol-gel Method[J]. Chemical Research In Chinese Universities, 2003, 24(10): 1830-1833 |
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| Authors: | LI Jin-Hua ZHANG Xin-Tong LIU Yi-Chun GUO Wei BAI Yu-Bai LI Tie-Jin |
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| Affiliation: | 1. Institute of Theoretical Physics, Northeast NormaLUniversity, Changchun 130024, China;2. Key Lab of Excited State Process of Chinese Academy of Sciences, Changchun Institute of Optics, Fine Mechanics and Physics, Changchun 130021, China;3. Colloge of Chemistry, Jilin University, Changchun 130023, China |
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| Abstract: | Nanofilms of MgxZn1-xO with different Mg contents were fabricated by sol-gel method.The XRD spectra indicated that the films were hexagonal wurtzite structure with 3-5 nm grain size and the lattice constant of Mg xZn1-xO gradually decreased with increasing Mg content.The UV-Vis absorption spectra showed that the band gap energy increased and the exciton peak had an obvious blue-shift with increasing Mg content.The strong deep level emission demonstrated that oxygen vacancy increased with the content of Mg atoms entering ZnO lattice.To obtain high quality MgxZn1-xO thin films, Mg0.03Zn0.97O film was annealed at 700℃ in oxygen ambient.The UV-Vis absorption spectrum and the PLspectrum demonstrated that high quality films could be obtained by annealing. |
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| Keywords: | Sol-gel method Mg xZn 1-xO nanofilms XRD Photoluminescence |
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