Wang Zhijun, Li Panlai, Guo Qinglin, Yang Zhiping
College of Physics Science & Technology, Hebei University, Baoding 071002, China.
College of Physics Science & Technology, Hebei University, Baoding 071002, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2015 Feb 25;137:871-6. doi: 10.1016/j.saa.2014.09.023. Epub 2014 Sep 20.
A series of Ca2PO4Cl:Ce(3+), Mn(2+) phosphors are synthesized by a high temperature solid state reaction method, and their luminescent properties are investigated. Ca2PO4Cl:Ce(3+), Mn(2+) has an obvious absorption in the region of 300-350 nm, and energy transfer from Ce(3+) to Mn(2+) in Ca2PO4Cl has been validated, and proved to be a resonant type via a dipole-dipole interaction. Orange red emission intensity of Mn(2+) can be obviously enhanced via the efficient energy transfer from Ce(3+) to Mn(2+), and critical distance of energy transfer is also calculated by concentration quenching method, and about 14.1 Å. The results show that Ce(3+) ion may be an available sensitizer for Ca2PO4Cl:Mn(2+), and Ca2PO4Cl:Ce(3+), Mn(2+) may have potential application in white light emitting diodes.
采用高温固相反应法合成了一系列Ca2PO4Cl:Ce(3+), Mn(2+)荧光粉，并对其发光性能进行了研究。Ca2PO4Cl:Ce(3+), Mn(2+)在300 - 350 nm区域有明显吸收，Ca2PO4Cl中Ce(3+)到Mn(2+)的能量转移已得到验证，并通过偶极 - 偶极相互作用证明是共振型。通过Ce(3+)到Mn(2+)的有效能量转移，Mn(2+)的橙红色发射强度可明显增强，还通过浓度猝灭法计算了能量转移的临界距离，约为14.1 Å。结果表明Ce(3+)离子可能是Ca2PO4Cl:Mn(2+)的有效敏化剂，Ca2PO4Cl:Ce(3+), Mn(2+)在白光发光二极管中可能具有潜在应用。
