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以硝酸锌和硫粉分别为锌源和硫源,利用水热法在碱性体系下合成了具有光谱下转换功能的Zn S∶Sm微球。探讨了Sm3+掺杂浓度、反应温度对Zn S∶Sm微球的晶相结构和发光性质的影响。采用SEM、XRD、PL和PLE等对微球的晶体形貌、物相结构和荧光性能进行表征。结果表明,Sm3+掺杂浓度越高,晶体中发光中心越多、发光越强,但Sm3+掺杂浓度达到摩尔分数5%时,在浓度淬灭和Zn S晶格畸变的双重作用下,导致发光减弱。反应温度越高,晶体生长越完整,晶体的发光越强。
Zinc nitrate and sulfur powder were used respectively as zinc source and sulfur source. Zn S: Sm microspheres with spectral conversion function were synthesized by hydrothermal method under basic system. The effects of Sm3 + doping concentration and reaction temperature on the crystal structure and luminescent properties of ZnS:Sm microspheres were investigated. The morphology, phase structure and fluorescence of the microspheres were characterized by SEM, XRD, PL and PLE. The results show that the higher the Sm3 + doping concentration is, the more luminescent centers are in the crystal and the stronger the luminescence is. However, when Sm3 + doping concentration reaches 5% of the mole fraction, under the dual action of concentration quenching and ZnS lattice distortion, Weakened. The higher the reaction temperature, the more complete crystal growth, the stronger the crystal luminescence.