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首页> 外文期刊>Physica, B. Condensed Matter >Synthesis and luminescence properties of SrAl _2O _4:Eu ~2,Dy ~3 nanosheets
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Synthesis and luminescence properties of SrAl _2O _4:Eu ~2,Dy ~3 nanosheets

机译：SrAl _2O _4：Eu〜2，Dy〜3纳米片的合成与发光性能

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摘要

We report an effective method to synthesize SrAl _2O _4:Eu ~2,Dy ~3 nanosheets. Sheet-like precursors were firstly synthesized by the solvothermal method, and acetate was used as the raw material. Then the final products were obtained by calcinating the precursor in a weak reductive atmosphere of H _2. The crystal structure and particle morphology were investigated by X-ray diffraction (XRD) patterns, field-emission scanning electron microscopy and transmission electron microscopy (FE-SEM and TEM), respectively. A possible growth mechanism was proposed to reveal the formation process. Luminescence properties of the SrAl _2O _4:Eu ~2,Dy ~3 long-lasting phosphor were analyzed by measuring the excitation spectra, the emission spectra, the afterglow decay curve and the thermoluminescence curve. Both the photoluminescence (PL) spectra and luminance decay revealed that the phosphors had efficient luminescent and long lasting properties compared with the phosphors prepared by using nitrates as the raw material. Furthermore, the photoluminescence intensity was even a little higher than commercial phosphors.
机译：我们报告了一种有效的方法来合成SrAl _2O _4：Eu〜2，Dy〜3纳米片。首先通过溶剂热法合成片状前体，并以乙酸盐为原料。然后通过在弱的H _2还原气氛中煅烧前体获得最终产品。分别通过X射线衍射（XRD）图，场发射扫描电子显微镜和透射电子显微镜（FE-SEM和TEM）研究了晶体结构和颗粒形态。提出了一种可能的生长机理来揭示其形成过程。通过测量激发光谱，发射光谱，余辉衰减曲线和热致发光曲线，分析了SrAl _2O _4：Eu〜2，Dy〜3持久荧光粉的发光特性。光致发光（PL）光谱和亮度衰减都表明，与以硝酸盐为原料制备的荧光粉相比，荧光粉具有高效的发光和持久的性能。此外，光致发光强度甚至比市售磷光体稍高。

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