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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Soft-chemical synthesis and tunable luminescence of Tb3~+, Tm3~+/Dy3~+-doped SrY_2O_4 phosphors for field emission displays
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Soft-chemical synthesis and tunable luminescence of Tb3~+, Tm3~+/Dy3~+-doped SrY_2O_4 phosphors for field emission displays

机译：Tb3〜+，Tm3〜+ / Dy3〜+掺杂SrY_2O_4荧光粉的软化学合成和可调谐发光

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摘要

Tb~(3+), Tm~(3+), and Dy~(3+)-activated SrY _2O_4 phosphors have been prepared via Pechini-type sol-gel method. X-Ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), photoluminescence (PL) and lifetimes, as well as cathodoluminescence (CL) spectra were used to characterize the samples. Under low-voltage electron beam excitation, the Tb ~(3+)-doped samples show a green luminescence, with a better CIE coordinates and higher emission intensity than the commercial product ZnO: Zn. Blue and yellow emissions could be obtained by doping with Tm~(3+) and Dy~(3+), respectively. A color-tunable emission in SrY2O 4 phosphors can be realized by co-doping with Tm~(3+) and Dy~(3+). White cathodoluminescence (CL) has been realized in a single-phase SrY_2O_4 host by co-doping with Tm~(3+) and Dy~(3+) for the first time with CIE (0.315, 0.333). Furthermore, the cathodoluminescence (CL) properties of SrY_2O_4: Tb ~(3+)/Tm~(3+)/Dy~(3+) phosphors including the dependence of CL intensity on accelerating voltage and filament current, the decay behaviour of CL intensity under electron bombardment, and the stability of CIE chromaticity coordinate have been investigated in detail. The as-prepared phosphors might be promising for use in field-emission display (FED) devices.
机译：通过Pechini型溶胶-凝胶法制备了Tb〜（3 +），Tm〜（3+）和Dy〜（3+）活化的SrY_2O_4荧光粉。使用X射线衍射（XRD），场发射扫描电子显微镜（FE-SEM），透射电子显微镜（TEM），光致发光（PL）和寿命以及阴极发光（CL）光谱来表征样品。在低压电子束激发下，掺杂Tb〜（3+）的样品显示绿色发光，比市售产品ZnO：Zn具有更好的CIE坐标和更高的发射强度。通过分别掺杂Tm〜（3+）和Dy〜（3+）可以获得蓝色和黄色发射。通过与Tm〜（3+）和Dy〜（3+）共同掺杂，可以实现SrY2O 4荧光粉的颜色可调发射。通过与TIE〜（3+）和Dy〜（3+）首次与CIE（0.315，0.333）共掺杂，已经在单相SrY_2O_4宿主中实现了白色阴极发光（CL）。此外，SrY_2O_4：Tb〜（3 +）/ Tm〜（3 +）/ Dy〜（3+）荧光粉的阴极发光（CL）特性包括CL强度与加速电压和灯丝电流的相关性，CL的衰减行为对电子轰击强度，CIE色度坐标的稳定性进行了详细研究。所制备的磷光体可能有望用于场发射显示器（FED）装置。

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