Abstract A novel color tunable phosphor was developed by a high-temperature solid-state reaction route with apatite-type Ca8NaGd(PO4)6F2 (CNGF) as matrix for the doping with Ce3+ and Tb3+ ions. The crystal structures were studied by XRD and Rietveld refinement, which clarified the structural parameters and the occupation of doped ions in crystal lattice. The luminescent intensity of Tb3+ ions was significantly improved by the energy transfer from Ce3+ to Tb3+ ions. According to the luminescence spectra and fluorescence decay curves of CNGF: Ce3+, Tb3+, a possible energy transfer mechanism was proposed. Fluorescent paper was prepared by binding the CNGF: Ce3+, Tb3+ phosphor particles with bacterial cellulose, and the morphology and luminescence properties of the paper were investigated. These results demonstrate that the obtained CNGF: Ce3+, Tb3+ is a promising green phosphor candidate for solid-state lighting and anti-counterfeiting applications.

中文翻译：

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Ce3+、Tb3+活化磷灰石型Ca8NaGd(PO4)6F2荧光粉的能量转移、光学性质和热稳定性

摘要 以磷灰石型Ca8NaGd(PO4)6F2(CNGF)为基体，掺杂Ce3+和Tb3+离子，通过高温固相反应路线开发了一种新型彩色可调荧光粉。通过XRD和Rietveld精修对晶体结构进行了研究，阐明了结构参数和掺杂离子在晶格中的占有率。通过从 Ce3+ 到 Tb3+ 离子的能量转移，Tb3+ 离子的发光强度显着提高。根据CNGF:Ce3+、Tb3+的发光光谱和荧光衰减曲线，提出了一种可能的能量转移机制。通过将CNGF:Ce3+、Tb3+荧光粉颗粒与细菌纤维素结合制备荧光纸，并研究了纸的形貌和发光性能。这些结果表明得到的 CNGF:Ce3+,