Abstract The Ce3+-Tb3+ doped CaSi2O2N2 phosphors are successfully obtained via conventional solid-state reaction at normal pressure. Broad absorption bands from Ce3+ are clearly observed in the excitation spectra of CaSi2O2N2:Tb3+, Ce3+. The emission spectra present a combination of Tb3+ and Ce3+ emission bands, and the emission intensity of Ce3+ is decreased along with the enhancement of the emission intensity of Tb3+. The energy transfer from Ce3+ to Tb3+ in the CaSi2O2N2 host is confirmed to be resonant type via a dipole–dipole interaction mechanism. It is also found that the luminescence intensity of the Tb3+-Ce3+ doped CaSi2O2N2 phosphors prepared in N2/H2 atmosphere is stronger than that prepared in pure N2.

中文翻译：

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Tb3+-Ce3+掺杂CaSi2O2N2氧氮化物磷光体的光致发光特性和能量转移机制

摘要 通过常规常压固相反应，成功获得了Ce3+-Tb3+掺杂CaSi2O2N2荧光粉。在 CaSi2O2N2:Tb3+、Ce3+ 的激发光谱中可以清楚地观察到 Ce3+ 的宽吸收带。发射光谱呈现出Tb3+和Ce3+发射带的组合，Ce3+的发射强度随着Tb3+发射强度的增强而降低。通过偶极-偶极相互作用机制，CaSi2O2N2 主体中从 Ce3+ 到 Tb3+ 的能量转移被证实是共振型的。还发现在N2/H2气氛中制备的Tb3+-Ce3+掺杂CaSi2O2N2荧光粉的发光强度比在纯N2中制备的强。