Sun Huapeng, Yang Meili, Zhang Anlin, Lei Yanhua, Deng Bin
Chenjiang Laboratory, School of New Energy, Chenzhou Vocational Technical College, Chenzhou, Hunan, 423000, P. R. China.
School of Chemistry and Environmental Science, Xiangnan University, Chenzhou, Hunan, 423043, P. R. China.
J Fluoresc. 2024 Dec 7. doi: 10.1007/s10895-024-04059-z.
In this work, trivalent europium (Eu) ion activated KSr(MoO) red phosphors have been synthesized through high-temperature solid-state reaction method at 750 ℃. Detailed analysis was conducted on the phase purity, morphology, and luminescence properties of the synthesized phosphors. X-ray diffraction (XRD) confirmed the successful formation of KSr(MoO):Eu phosphors with pure phase with space group С. The photoluminescence (PL) spectroscopy was used to record the excitation and emission spectrum of Eu activated KSr(MoO) phosphor. Under the excitation of 280 nm, the resultant samples exhibited the characteristic emissions of Eu ions corresponding to the D→F transitions. The optimal doping concentration of Eu ions was determined to be 35 mol%. Concentration quenching mechanism was identified as the interaction of near-neighbor ions. The chromaticity coordinates of KSr(MoO):35 mol%Eu were (0.659, 0.340) with a corresponding high color purity of 99.8%. The prepared KSr(MoO):35 mol%Eu phosphor had good thermal stability with temperature quenching temperature (T > 420 K) and high activation energy (E = 0.267 eV). The exhaustive findings from this study form the basis for advocating the application of these phosphors in light-emitting devices.
在本工作中，通过高温固态反应法在750℃合成了三价铕（Eu）离子激活的KSr(MoO)红色荧光粉。对合成荧光粉的相纯度、形貌和发光性能进行了详细分析。X射线衍射（XRD）证实成功形成了具有空间群С的纯相KSr(MoO):Eu荧光粉。采用光致发光（PL）光谱记录Eu激活的KSr(MoO)荧光粉的激发和发射光谱。在280nm激发下，所得样品呈现出对应于D→F跃迁的Eu离子特征发射。确定Eu离子的最佳掺杂浓度为35mol%。浓度猝灭机制被确定为近邻离子的相互作用。KSr(MoO):35mol%Eu的色度坐标为(0.659, 0.340)，相应的高色纯度为99.8%。制备的KSr(MoO):35mol%Eu荧光粉具有良好的热稳定性，热猝灭温度（T>420K）和高激活能（E=0.267eV）。本研究的详尽发现为倡导这些荧光粉在发光器件中的应用奠定了基础。
