石英颗粒表面合成六棱柱状Mn^(2+)掺杂Zn_2SiO_4及光致发光性能研究

Synthesis and luminescence properties of hexagonal prism Mn^(2+) doped Zn_2SiO_4 on surface of quartz particles

以SiO2颗粒和Zn(CH3COO)2为原料,采用水热法在不锈钢反应釜中低温制备了Mn2+掺杂的Zn2SiO4荧光材料。利用X线衍射仪(XRD)、扫描电子显微镜(SEM)和荧光分光光度计对影响产物结构及发光性能的反应温度、反应时间、NH4OH质量分数等参数进行研究。结果表明:六棱柱状的ZnSiO4纳米颗粒可以在220℃的低温水热条件下获得,以该法制备的Mn2+掺杂ZnSiO4具有良好的光致发光性能,在220 nm紫外光激发下产生525 nm的绿色发光,并且发光强度随水热反应温度、时间以及NH4OH浓度改变而改变。

Mn^2＋ doped Zn2Si04 phosphors were prepared by hydrothermal method using SiO2 particles and Zn （CH3COO）2 as raw materials in stainless-steel autoclaves. Effects of reaction temperature, time, and concentration of NH4OH on the structure and the luminescence properties of these products were studied with X- ray diffraction apparatus （XRD） , scanning electron microscope （SEM） and fluorescence spectrum. Results show that hexagonal prism Zn2SiO4 crystals can be achieved by hydrothermal method at 220℃. Mn^2＋ doped Zn2SiO4 has a luminescence band with the wavelength at about 525 nm under 220 nm excitation, and the luminescent intensity changes with the alteration of reaction time, temperature, and concentration of NH4OH.