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摘要
采用高温固相反应法制备了一系列新型荧光粉Sr2ScNbO6:RE3+(RE=Eu,Sm,Dy)。利用X射线衍射(XRD)、扫描电镜(SEM)、光致发光(PL)、激发光谱和发射光谱(PLE)、荧光衰减寿命和温度相关的发射光谱对这些合成样品进行了表征。结果表明:在紫外光激发下,Sr2ScNbO6:Eu3+、Sr2ScNbO6:Sm3+和Sr2ScNbO6:Dy3+,分别在612nm(5D0→7F2跃迁)红光、605nm(4G5/2→6H7/2跃迁)橙光和579nm(4F9/2→6H13/2跃迁)黄光的主要特征发射。Sr2ScNbO6:RE3+(RE=Eu,Sm,Dy)荧光粉均存在浓度猝灭现象,其中Sr2ScNbO6:Dy3+浓度猝灭归因于离子交换相互作用,其他2种样品浓度猝灭均归因于电偶极-电偶极相互作用。Sr2ScNbO6:RE3+(RE=Eu,Sm,Dy)荧光粉的热稳定性优异,其中Sr2ScNbO6:Dy3+、Sr2ScNbO6:Sm3+在473K时保持在室温发射强度的85%以上。Sr2ScNbO6:RE3+(RE=Eu,Sm,Dy)荧光粉的荧光寿命短,均在几十微秒之间。在CIE色坐标分析中,Sr2ScNbO6:RE3+(RE=Eu,Sm)荧光粉色纯度高属于高饱和荧光粉,Sr2ScNbO6:Dy3+色纯度较低可应用于健康照明;通过计算色温,表明该基质材料体系掺杂不同RE3+,具备产生从极暖(1700～2000K)到冷白(7000K)关键色温的潜力。综上可知,Sr2ScNbO6:RE3+(RE=Eu,Sm,Dy)荧光粉凭借其优良热稳定性及其发射光谱特性,可望应用于照明、显示和生物医学领域。
Abstract
A series of novel phosphors Sr2ScNbO6:RE3+ (RE=Eu,Sm,Dy) were prepared by the high-temperature solid-state reaction method.The synthesized samples were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM),photoluminescence (PL) excitation and emission spectra (PLE),fluorescence decay lifetime,and temperature-dependent emission spectra.The results showed that under ultraviolet light excitation,Sr2ScNbO6:Eu3+,Sr2ScNbO6:Sm3+,and Sr2ScNbO6:Dy3+ exhibited main characteristic emissions at 612nm (5D0→7F2 transition) for red light,605nm (4G5/2→6H7/2 transition) for orange light,and 579nm (4F9/2→6H13/2 transition) for yellow light,respectively.Concentration quenching phenomena were observed in all Sr2ScNbO6:RE3+ (RE=Eu,Sm,Dy) phosphors.The concentration quenching of Sr2ScNbO6:Dy3+ was attributed to ion exchange interactions,while the other two samples' concentration quenching was due to electric dipole-dipole interactions.The thermal stability of Sr2ScNbO6:RE3+ (RE=Eu,Sm,Dy) phosphors was excellent,with Sr2ScNbO6:Dy3+ and Sr2ScNbO6:Sm3+ maintaining more than 85% of their room-temperature emission intensity at 473K.The fluorescence lifetimes of Sr2ScNbO6:RE3+ (RE=Eu,Sm,Dy) phosphors were short,all within tens of microseconds.In the CIE color coordinate analysis,Sr2ScNbO6:RE3+(RE=Eu,Sm) phosphors exhibited high color purity and belonged to high-saturation phosphors,while Sr2ScNbO6:Dy3+ had lower color purity and could be applied in healthy lighting.The calculation of color temperature indicated that this matrix material system,when doped with different RE3+,had the potential to produce key color temperatures ranging from extremely warm (1700～2000K) to cool white (7000K).In summary,Sr2ScNbO6:RE3+ (RE=Eu,Sm,Dy) phosphors,with their excellent thermal stability and emission spectral characteristics,are expected to be applied in lighting,display,and biomedical fields.
关键词
Sr2ScNbO6:RE3+(RE=Eu,Sm,Dy)
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双钙钛矿
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橙光荧光粉
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红光荧光粉
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白光LED
Key words
Sr2ScNbO6:RE3+(RE=Eu,Sm,Dy)
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double perovskite
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orange phosphor
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red phosphor
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W-LED
稀土(Eu3+,Sm3+,Dy3+)离子掺杂Sr2ScNbO6的发光性能研究与应用策略[J].
化工新型材料, 2026, 54(8): 96-104 DOI:10.19817/j.cnki.issn1006-3536.2026.08.035
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基金资助
福建省自然科学基金项目(2020J01297);厦门理工学院研究生科技创新计划项目(YKJCX2024117)
