采用Gd（NO3）3、 Pr6O11、 HNO3、（NH4）2SO4和NH3·H2O为实验原料，通过共沉淀还原法合成了Gd2 O2 S ∶ Pr3＋荧光粉。利用傅里叶变换红外光谱（ FT?IR）、 X射线衍射（ XRD）、扫描电子显微镜（ SEM）和光致发光（ PL）等手段对合成产物进行了表征。结果表明前驱体具有非晶态结构，在空气气氛中800℃煅烧2 h能转化为单相的Gd2 O2 SO4粉体，该粉体在氩氢混合气氛下800℃煅烧1 h能转化为单相的Gd2 O2 S粉体。 Gd2 O2 S粉体呈准球形，粒径大约1μm左右，团聚严重。 PL光谱分析表明在303 nm的紫外光激发下， Gd2 O2 S ∶ Pr3＋荧光粉呈绿光发射，主发射峰位于514 nm，归属于Pr3＋离子的3P0－3H4跃迁， Pr3＋离子的猝灭浓度为1mol％。
A co?precipitation reduction method for synthesizing Gd2 O2 S ∶ Pr3+ phosphors was developed, using Gd ( NO3 ) 3 ·6H2 O, Pr6 O11 , HNO3 , ( NH4 ) 2 SO4 and NH3 ·H2 O as the starting materials. The characterizations of the syn?thetic products were obtained by fourier transform infrared spectroscopy ( FT?IR) , X?ray diffraction ( XRD) , scanning e?lectron microscopy ( SEM) , and photoluminescence ( PL) spectroscopy. The results revealed that the as synthesized pre?cursor has noncrystalline structure and could be transformed into single phase Gd2 O2 SO4 by calcining at 800 o C for 2 h in air. By calcining the Gd2 O2 SO4 at 800 o C for 1 h in argon and hydrogen mixed atmosphere, pure Gd2 O2 S phase can be synthesized and this phosphor particles are quasi?spherical in shape, serious aggregation and about 1μm in size. PL spec?tra of the Gd2 O2 S ∶ Pr3+ phosphors under 303 nm ultraviolet light excitation show a green emission at 514 nm as the most prominent peak, which attributes to the 3P0-3H4 transition of Pr3+ ions. Moreover, the quenching concentration of Pr3+ions is 1mol%.
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