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1.吉林化工学院 分析测试中心,吉林 吉林 132022
2.吉林大学 化学学院,吉林 长春 130012
3.东北电力大学 能源与动力工程学院,吉林 吉林 132012
[ "陈杰(1990-),女,吉林通化人,博士,副教授,2018年于吉林大学获得博士学位,主要从事稀土发光材料的制备与应用的研究。E-mail: jiechendr@163.com" ]
收稿日期:2021-11-24,
修回日期:2021-12-08,
纸质出版日期:2022-02
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陈杰, 高忆欣, 王超, 等. 六角柱形NaErF4和NaErF4@NaYF4核壳微粒制备及多色上转换荧光调控性能[J]. 发光学报, 2022,43(2):209-217.
Jie CHEN, Yi-xin GAO, Chao WANG, et al. Preparation and Polychromatic Upconversion Luminescence of Hexagonal NaErF4 and NaErF4@NaYF4 Core-shell Particles[J]. Chinese journal of luminescence, 2022, 43(2): 209-217.
陈杰, 高忆欣, 王超, 等. 六角柱形NaErF4和NaErF4@NaYF4核壳微粒制备及多色上转换荧光调控性能[J]. 发光学报, 2022,43(2):209-217. DOI: 10.37188/CJL.20210373.
Jie CHEN, Yi-xin GAO, Chao WANG, et al. Preparation and Polychromatic Upconversion Luminescence of Hexagonal NaErF4 and NaErF4@NaYF4 Core-shell Particles[J]. Chinese journal of luminescence, 2022, 43(2): 209-217. DOI: 10.37188/CJL.20210373.
采用简单的水热法合成了六角柱形NaErF
4
和NaErF
4
@NaYF
4
核壳上转换发光材料,利用扫描电镜(SEM)、X射线粉末衍射(XRD)和荧光光谱(PL)等表征对材料的形貌、结构和上转换发光性能进行了研究。结果表明,纯NaErF
4
样品为六角柱形,边长和厚度均为1 μm左右,样品表面光滑。随着NaYF
4
壳层的包覆,六角相NaErF
4
周围出现了大量的立方相NaYF
4
纳米颗粒,得到了NaErF
4
@NaYF
4
核壳结构。荧光光谱表明,通过在六角柱形NaErF
4
表面包覆NaYF
4
壳层,可以有效增强上转换发光强度,其中,位于527
543
663 nm处的3个发射峰分别对应于Er
3+
的
2
H
11/2
→
4
I
15/2
、
4
S
3/2
→
4
I
15/2
和
4
F
9/2
→
4
I
15/2
能级跃迁。随着壳层中Y∶F比例的增加,立方相NaYF
4
的晶体衍射峰逐渐增强;同时,对应的NaErF
4
@NaYF
4
样品发射光谱中红绿比(
R/G
)逐渐增大,发光颜色也从绿色、经黄绿色逐渐向黄色过渡,实现了多色发光。
Hexagonal NaErF
4
and NaErF
4
@NaYF
4
core-shell upconversion luminescent materials were synthesized by simple hydrothermal method. The morphology
structure and upconversion luminescence properties of the obtained materials were studied by scanning electron microscopy(SEM)
X-ray powder diffraction(XRD) and fluorescence spectroscopy(PL). The results show that the pure NaErF
4
sample has hexagonal column morphology with smooth surface
and the side length and thickness are both 1 μm. With the coating of NaYF
4
shell
a large number of cubic NaYF
4
nanoparticles appeared around hexagonal NaYF
4
particles
and the NaErF
4
@NaYF
4
core-shell materials were obtained. The luminescence spectra show that the upconversion luminescence intensity can be effectively enhanced by coating NaYF
4
shell on the surface of hexagonal NaErF
4
. The three emission peaks at 527
543
663 nm correspond to
2
H
11/2
→
4
I
15/2
4
S
3/2
→
4
I
15/2
and
4
F
9/2
→
4
I
15/2
energy level transitions of Er
3+
respectively. Meanwhile
with the increase of the molar ratio of Y∶F in the shell of NaErF
4
@NaYF
4
sample
the crystal diffraction peak of cubic NaYF
4
increases gradually
moreover
the red green ratio(
R/G
) gradually increases in the emission spectrum of the sample
and the luminescence color gradually transits from green to yellow
realizing multi-color luminescence.
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