【摘要】 采用高温固相法合成P掺杂的BaMgAl10O17:Mn2+荧光粉,其中P通过(NH4)2HPO4引入.利用X射线衍射谱、傅里叶变换红外光谱、扫描电子显微镜、能量色散谱、真空紫外光谱等研究了P掺杂对BaMgAl10O17:Mn2+晶体结构、微观形貌、发光性能等的影响.研究结果表明:(NH4)2HPO4具有助熔剂的作用,它的加入有助于荧光粉的晶化,改善荧光粉的形貌.P掺杂进入晶格,使得晶胞参数变小,从而改变了Mn2+的晶体场环境,引起发射光谱蓝移,色坐标x值降低.P掺杂能有效提高基质对真空紫外线的吸收,从而提高真空紫外激发下的发光强度.更多还原

【Abstract】 The diammonium phosphate was added as start material to synthesize P-doped BaMgAl₁0O₁7:Mn2+ phosphors,which were prepared by high temperature solid state technology.The effect of P-doping on the structure,morphology and luminescent properties of BaMgAl₁0O₁7:Mn2+ were determined by X-ray diffraction,scanning electron microscopy,Fourier-transform infrared spectroscopy,energy dispersive X-ray spectroscopy and vacuum ultraviolet（VUV）spectra.The results show that P doping is conducive to the crystallization of the phosphors and improving the morphology.The lattice parameters become smaller when the phosphor is doped with P.The P doping makes the emission spectra to blue-shift and the CIE x value to decrease.At appropriate P concentration,the absorption of the matrix in VUV range is improved,and the emission intensity under VUV excitation is enhanced.更多还原