Zn^(2+)掺杂NaAlSiO_(4):Er^(3+),Yb^(3+)微晶玻璃制备及上转换发光性能

Preparation and up-conversion luminescence properties ofZn^(2+)doped NaAlSiO_(4):Er^(3+),Yb^(3+)microcrystalline glass

主要研究过渡金属Zn^(2+)离子掺杂对NaAlSiO_(4):Er^(3+),Yb^(3+)微晶玻璃上转换发光性能的影响。采用高温熔融法制备不同掺杂浓度的Zn^(2+)掺杂NaAlSiO_(4):Er^(3+),Yb^(3+)上转换发光样品,通过同步热分析仪(DSC)、X射线衍射仪(XRD)、傅里叶红外光谱仪和荧光光谱分析仪等对样品进行热处理制度、析出晶体、玻璃结构和发光性能的表征分析。采用两步法对基质玻璃进行热处理之后,样品中析出NaAlSiO_(4)晶体,随着Zn^(2+)离子掺杂浓度的增加,样品的结晶完整度有所变化,说明Zn^(2+)进入到晶体内部,打破了晶体内部对称性,引起晶格畸变。在980 nm激光器泵浦激发下样品在543 nm处出现绿光发射峰,在668 nm处出现红光发射峰。结果表明,位于668 nm处的红光发射峰强度随着Zn^(2+)掺杂浓度的不断增加而逐渐增强,说明一定浓度的过渡金属Zn^(2+)的掺杂会对样品的上转换发光强度的提升有较大的促进作用。

This paper mainly studies the effect of Zn^(2+)ion doping on the conversion luminescence performance of NaAlSiO_(4):Er^(3+),Yb^(3+)glass-ceramics.Zn^(2+)doped NaAlSiO_(4):Er^(3+),Yb^(3+)up-converted luminescent samples are prepared by high temperature melting method.The heat treatment system,crystal precipitation,glass structure and luminescent properties of the samples are analyzed by synchronous thermal analyzer(DSC),X-ray diffraction(XRD),Fourier infrared spectrometer and fluorescence spectrum analyzer.After the two-step heat treatment of matrix glass,NaAlSiO_(4)crystals are precipitated out of the sample.With the gradual increase of Zn^(2+)ion doping concentration,the crystal integrity of the sample changes,indicating that Zn^(2+)enters the crystal interior,breaking the symmetry inside the crystal and causing lattice distortion.Under the pumping excitation of the 980 nm laser,green light emission peak appears at 543 nm and red emission peak appears at 668 nm.The results show that the emission intensity of red light at 668 nm increases gradually with the increase of Zn^(2+)doping concentration,indicating that a certain concentration of Zn^(2+)doping has a great promotion effect on the enhancement of up-conversion luminescence intensity of the sample.