Sm掺杂ZnO QDs的制备及其荧光性能研究
收稿日期: 2020-02-26
网络出版日期: 2020-08-12
基金资助
国家自然科学基金地区科学基金项目(31560466);广西高等学校高水平创新团队及卓越学者计划资助项目(桂教人[2014]7号);广西科技大学博士启动基金项目(12Z04);西研究生教育创新计划项目(YCSW2020220)
Preparation of Sm doped ZnO QDs and its fluorescence performance
Received date: 2020-02-26
Online published: 2020-08-12
通过研究不同碱/锌、钐/锌物质的量比制备了分散性良好的Sm掺杂氧化锌量子点（ZnO QDs）。通过紫外可见光谱（UV-vis）、X射线衍射（XRD）、场致发射透射电子显微镜（TEM）、能量色散X射线谱（EDS）、X射线光电子能谱（XPS）对样品做了表征。研究结果表明,n（Zn）∶n（OH-）=1∶1、Sm掺杂量为4%（物质的量分数）时制备的ZnO QDs在383 nm紫外光激发下的荧光发射强度最强。并发现稀土钐离子的掺杂与ZnO QDs的氧空位（OV）形成有关。Sm掺杂后的ZnO QDs的氧空位浓度比未掺杂的高,且ZnO QDs氧空位的浓度越大,其荧光发射强度越强。
黄秋梅 , 吕晓威 , 谭嘉麟 , 李利军 , 程昊 , 冯军 , 黄文艺 . Sm掺杂ZnO QDs的制备及其荧光性能研究[J]. 无机盐工业, 2020 , 52(8) : 30 -35 . DOI: 10.11962/1006-4990.2019-0498
Sm-doped zinc oxide quantum dots（ZnO QDs） with good dispersibility were prepared by studying different amount-of-substance ratiosof alkali-zinc and samarium-zinc.It was characterized by UV-vis spectroscopy（UV-vis）,X-ray diffraction（XRD）,field emission transmission electron microscopy（TEM）,energy dispersive X-ray spectroscopy（EDS） and X-ray photoelectron spectroscopy（XPS）.The results showed that ZnO QDs prepared with n（Zn）∶n（OH-）=1∶1 and Sm doping amount of 4%（amount-of-substance fraction） had the strongest fluorescence emission intensity under UV excitation at 383 nm.It was also found that the doping of rare earth Sm ions was related to the formation of oxygen vacancies（OV） in ZnO QDs.The oxygen vacancy concentration of Sm-doped ZnO QDs was higher than that of undoped,and the higher the concentration of oxygen vacancies in ZnO QDs,the stronger the fluorescence emission intensity.
Key words： ZnO QDs; Sm; doping; fluorescence
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