Structure, luminescence properties and energy transfer behavior of color-adjustable Sr3Gd2(Si3O9)2: Ce3+, Tb3+/Mn2+ phosphors
Structure, luminescence properties and energy transfer behavior of color-adjustable Sr3Gd2(Si3O9)2: Ce3+, Tb3+/Mn2+ phosphors
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可调色Sr3Gd2(Si3O9)(2):Ce3、Tb3/Mn2荧光粉的结构、发光性能和能量传输行为
DOI：
10.1039/c5ra20756h
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发表时间：
2015-01-01
期刊：
影响因子：
3.9
通讯作者：
Wang, Song
中科院分区：
文献类型：
--
作者：
Zhu, Yingli;Liang, Yujun;Wang, Song
通过固相反应成功制备了一系列单相可调谐Sr3Gd2(Si3O9)(2) (SGSO): Ce3+， Tb3+/Mn2+荧光粉，并分别对Ce3+ -> Tb3+和Ce3+ -> Mn2+的晶体结构、发光性能、能量转移、颜色调谐和热稳定性进行了系统的研究。通过Ce3+发射光谱与Tb3+/Mn2+激发光谱的重叠，推导出Ce3+向Tb3+或Mn2+离子转移的能量。验证了Ce3+ -> Tb3+和Ce3+ -> Mn2+在基体中的能量传递机制分别为偶极子-四极子相互作用和偶极子-偶极子相互作用，使得发射色由蓝色向绿色和接近白色转变，对应的CIE色度坐标分别为（0.174,0.060）到（0.286,0.615）和（0.319,0.367）。SGSO: 0.26Ce（3+）、0.60Tb（3+）和SGSO: 0.26Ce（3+）、0.45Mn（2+）样品在室温下150℃时的热稳定性为其初始发射强度的72.3%和86.1%，这是由于Ce3+ -> Tb3+和Ce3+ -> Mn2+的能量传递效率不同。制备的SGSO: 0.26Ce（3+）、0.10Tb（3+）和SGSO: 0.26Ce（3+）、0.57Mn（2+）荧光粉的最大量子产率（QYs）分别达到80.2%和62.4%。这些性质表明SGSO: Ce3+， Tb3+/Mn2+荧光粉作为紫外转换荧光粉具有潜在的应用前景。
A series of single-phased and emission-tunable Sr3Gd2(Si3O9)(2) (SGSO): Ce3+, Tb3+/Mn2+ phosphors have been successfully prepared via the solid-state reaction, and the crystal structures, luminescence properties, energy transfer of Ce3+ -> Tb3+ and Ce3+ -> Mn2+, color tuning and thermally stability were systematically investigated respectively. The energy transfer from Ce3+ to Tb3+ or Mn2+ ions were deduced from the spectral overlap between the Ce3+ emission and Tb3+/Mn2+ excitation spectra. The energy transfer mechanisms of Ce3+ -> Tb3+ and Ce3+ -> Mn2+ in the host were verified to be a dipole-quadrupole interaction and dipole-dipole interaction, respectively, which made the emission color shift from blue to green and near white with the corresponding Commission Internationale deL'Eclairage (CIE) chromaticity coordinates from (0.174, 0.060) to (0.286, 0.615) and (0.319, 0.367), respectively. The good thermal stability of SGSO: 0.26Ce(3+), 0.60Tb(3+) and SGSO: 0.26Ce(3+), 0.45Mn(2+) samples showed about 72.3% and 86.1% at 150 degrees C of its initial emission intensity at room temperature due to the different energy transfer efficiency through Ce3+ -> Tb3+ and Ce3+ -> Mn2+. The maximum quantum yields (QYs) of as-prepared SGSO: 0.26Ce(3+), 0.10Tb(3+) and SGSO: 0.26Ce(3+), 0.57Mn(2+) phosphors could reach 80.2% and 62.4%, respectively. All these properties indicate that the SGSO: Ce3+, Tb3+/Mn2+ phosphors have potential applications as ultraviolet-convertible phosphors.