双掺杂Mn²⁺、Eu³⁺、Y³⁺离子硫化银纳米颗粒发光性能研究

Photo-Luminescence Properties of Doubly-Doped Mn²⁺, Eu³⁺, and Y³⁺ Ag₂S

摘要: 本文用油–水界面法制备了双掺杂金属离子硫化银纳米颗粒，并研究了掺杂Mn²⁺、Eu³⁺、Y³⁺，对其发光性能的影响。X射线衍射图谱表明：掺杂硫化银纳米颗粒均为α-Ag₂S晶型，未改变硫化银的晶型及晶体结构；由TEM图可见制备的硫化银纳米颗粒分散均匀，粒径为15.0 nm。同时，由紫外光谱及其能量带隙图分析可知，掺杂可以改变颗粒的带隙宽带，从而影响光学性能；由荧光图谱可得，通过控制掺杂金属离子的种类和浓度，复合材料的荧光强度会发生相应的变化，从而产生量子限域效应，进一步调控量子点的光学性能。以上分析说明了油–水界面法制备的荧光材料掺杂后可以改变其能量带隙并调节发光性能。

Abstract: Silver sulfide nanoparticles doubly-doped with ions have been prepared by the oil-water interface method. The influence of Mn²⁺, Eu³⁺ and Y³⁺ on the luminescent properties of silver sulfide has been studied. The X-ray diffraction pattern shows that the doped silver sulfide nanoparticles are all α-Ag₂S crystals, which does not change the crystal form and crystal structure of silver sulfide. The TEM diagram shows that the prepared silver sulfide nanoparticles are evenly dispersed and the particle size is 15.0 nm. The UV spectra and the energy band gap diagrams show that the doping can change the band gap of the material and affects the optical properties. It can be seen from the fluorescence patterns that by controlling the kind and concentration of doped metal ions, the fluorescence intensity of the composites will change correspondingly, resulting in the quantum confinement effect, which further regulates the optical properties of the composite nanoparticles. Overall, the luminescent materials of doped ions prepared by the oil-water interface method can change the energy band gap and regulate the luminescence properties.