A series of novel phosphate orange-red phosphor, Sr 9 In(PO 4 ) 7 : x Sm 3+ (0.01 < x < 0.30), were successfully synthesized from high-temperature solid-state synthesis in this work. Their crystal structure has been analyzed by the Rietveld refinement, which shows Sr 9 In(PO 4 ) 7 consists of a monoclinic cell ( C 2/ c ), which also confirms the successful doping, preferential site occupancy and local ligand environment of Sm 3+ . Luminescence properties of the samples have been systematically investigated including excitation and emission spectra, quantum efficiency, concentration quenching, fluorescence decay and temperature-dependent luminescence properties. Photoluminescence spectra exhibited typical peaks, corresponding to 4 G 5/2 → 6 H J transitions of Sm 3+ ions, where J = 5/2, 7/2, 9/2, and 11/2, respectiv...

中文翻译：

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热稳定掺杂Sm 3+的Sr 9 In（PO 4）7橙红色荧光粉的晶体结构和发光性能

通过高温固相合成成功地合成了一系列新型的磷橙红荧光粉Sr 9 In（PO 4）7：x Sm 3+（0.01 <x <0.30）。通过Rietveld精制法对其晶体结构进行了分析，结果表明Sr 9 In（PO 4）7由单斜晶胞（C 2 / c）组成，这也证实了Sm 3的成功掺杂，优先位占据和局部配体环境+。已经系统地研究了样品的发光特性，包括激发和发射光谱，量子效率，浓度猝灭，荧光衰减和随温度变化的发光特性。光致发光光谱显示出典型的峰，对应于Sm 3+离子的4 G 5/2→6 HJ跃迁，其中J = 5 / 2、7 / 2、9 / 2和11/2，分别...