中文摘要：

利用高温固相法制备了Ba9Y2（SiO4）6∶Ce3＋,Mn2＋（BYS∶Ce3＋,Mn2＋）荧光粉,并通过X射线衍射（XRD）谱、激发和发射光谱及荧光寿命的测试对材料的结构、发光特性和能量传递进行了研究。在327 nm激发下,BYS∶Ce3＋,Mn2＋发射光谱中包含2个发射峰,分别为位于407 nm的Ce3＋的蓝紫光发射和位于597nm的Mn2＋的红光发射。在该体系中,发现了Ce3＋向Mn2＋的有效能量传递,使得Mn2＋在597 nm处的红光发射显著提高,当x（Mn2＋）=0.25时,BYS∶Ce3＋,xMn2＋的能量传递效率可达39%。实验表明,该荧光粉可为紫外基白光LED提供良好的红光光源。

英文摘要：

Ba9Y2（SiO4）6∶Ce3＋,Mn2＋ phosphors were prepared by solid-state reaction and their structure,luminescence properties and energy transfer have been investigated by means of XRD,photoluminescence excitation and emission spectra,decay lifetimes,respectively.Upon 327 nm excitation,the phosphor Ba9Y2（SiO4）6∶Ce3＋,Mn2＋ exhibits two dominating bands centered at 407 and 597 nm,originate from 5d → 4f transition of the Ce3＋ ion and the 4T1g（4G） → 6A1g（6S） transition of the Mn2＋ ion,respectively.We have discovered energy transfers from Ce3＋ to Mn2＋.By utilizing the principle of energy transfer,Mn2＋ can generate a strong red emission band at 597 nm.The dependence of the ET efficiency can reach to 39% at x=0.25 in BYS∶Ce3＋,xMn2＋.The results indicate that BYS∶Ce3＋,Mn2＋ could be used for UV-based white leds as the red light source.