| Yb3+/Er3+共掺(MLaFn)x(M=0,K;n=3,4;x=1,1.5)纳米材料的控制合成及其上转换发光性质 |
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| 引用本文： | 刘媛媛,德格吉呼,王仙.Yb3+/Er3+共掺(MLaFn)x(M=0,K;n=3,4;x=1,1.5)纳米材料的控制合成及其上转换发光性质[J].发光学报,2019,40(2):143-152. |
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| 作者姓名： | 刘媛媛 德格吉呼 王仙 |
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| 作者单位： | 内蒙古师范大学 化学与环境科学学院,内蒙古 呼和浩特,010022;内蒙古师范大学 化学与环境科学学院, 内蒙古 呼和浩特 010022;内蒙古师范大学 内蒙古功能材料物理与化学重点实验室,内蒙古 呼和浩特 010022;吉林大学 集成光电子学国家重点联合实验室,吉林 长春 130012 |
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| 基金项目： | 内蒙古自治区科技创新引导项目基金（000-21090179）资助项目 |
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| 摘 要： | 采用水热与溶剂热结合的方法,在乙二醇-正己醇体系中,通过调节KF与RE(RE=La,Yb,Er)的量比、反应温度和反应时间实现了由LaF_3(六角相)到KLaF_4(立方相、六角相)晶型的控制合成。借助透射电子显微镜(TEM)和X射线粉末衍射(XRD)对样品的结构和微观形貌进行表征。结果表明,当KF/RE比例为2. 25时,制备的样品为片状的六角相LaF_3纳米颗粒;当KF/RE比例为3. 00时,得到具有近似球形的立方相KLaF_4纳米颗粒;当KF/RE比例为4. 25时,得到了六角相(KLaF_4)_(1. 5)纳米颗粒。上转换发射光谱显示:所有的样品在近红外光(980 nm)激发下,均有3个明显的发射峰,在522 nm、544 nm处分别对应于Er~(3+)的~4S_(3/2),~2H_(11/2)→~4I_(15/2)能级跃迁,655 nm处属于Er~(3+)的~4F_(9/2)→~4I_(15/2)能级跃迁。
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| 关 键 词： | 水热与溶剂热结合法 KF/RE的量比 稀土氟化物 上转换发光 |
| 收稿时间： | 2018-08-14 |
Controllable Synthesis and Upconversion Luminescence Properties of Yb3+/Er3+ Codoped (MLaFn)x (M=0,K;n=3,4;x=1,1.5) of Nanomaterials |
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| LIU Yuan-yuan,DE Ge-ji-hu,WANG Xian.Controllable Synthesis and Upconversion Luminescence Properties of Yb3+/Er3+ Codoped (MLaFn)x (M=0,K;n=3,4;x=1,1.5) of Nanomaterials[J].Chinese Journal of Luminescence,2019,40(2):143-152. |
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| Authors: | LIU Yuan-yuan DE Ge-ji-hu WANG Xian |
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| Institution: | 1. College of Chemistry and Environment Science, Inner Mongolia Normal University, Hohhot 010022, China;
2. Physics and Chemistry of Functional Materials, Inner Mongolia Normal University, Hohhot 010022, China;
3. State Key Laboratory on Integrated Optoelectronics, Jilin University, Changchun 130012, China |
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| Abstract: | Upconversion nanocrystals(UPCNs) from hexagonal phase LaF3 (β) to cubic phase KLaF4(α) or hexagonal phase(KLaF4)1.5(β) were prepared by simply tuning the molar ratio of KF to RE(RE=La, Yb, Er), reaction temperature and reaction time in ethlene glycol(EG) and 1-hexanol (HA) mixed solvents via a facile hydro/solvothermal method. The β-LaF3 to α-KLaF4 or β-(KLaF4)1.5 transformation process was studied by X-ray diffraction(XRD), fluorescence spectrophotometer with an external 980 nm single-wavelength diode laser and transmission electron microscopy(TEM) techniques. The results indicate that the hexagonal phase of LaF3 nanosheet was synthesized when the ratio of KF/RE was 2.25. With the ratio of KF/RE increased to 3.00, the approximate spherical cubic phase of KLaF4 was obtained. The cubic phase of KLaF4 completely transforms into the hexagonal phase of (KLaF4)1.5 when the ratio of KF/RE was 4.25. The red and green emission are corresponding to the transitions 4S3/2, 2H11/2→4I15/2(Green) at 522 nm and 544 nm, 4F9/2→ 4I15/2(Red) at 655 nm of Er3+ ions, respectively. |
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| Keywords: | hydro/solvothermal method molar ratio of KF/RE rare earth fluoride upconversion luminescence |
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