College of Physics Science and Technology, Hebei University, Baoding 071002, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2012 Feb 15;87:190-3. doi: 10.1016/j.saa.2011.11.035. Epub 2011 Nov 22.
Red-emitting phosphor Ca(9)Y(PO(4))(7):Eu(3+) were fabricated by solid-state reactions at high temperature. X-ray diffraction analysis revealed that Ca(9)Y(PO(4))(7) doped with 3mol% of Eu(3+) (Ca(9)Y(0.97)(PO(4))(7):0.03Eu(3+)) was pure orthorhombic phase. The photoluminescence study shows that the intensity of electric dipole transition ((5)D(0)→(7)F(2)) at 613nm dominates over that of magnetic dipole transition ((5)D(0)→(7)F(1)) at 594nm. The optimum concentration of Eu(3+) for the highest luminescence is found to be 3mol%. The PL excitation spectrum is composed of CT of Eu-O and excitation lines of Eu(3+) ions. The strongest excitation lines appeared at 392nm. The integral intensity of the emission spectrum of Ca(9)Y(0.97)(PO(4))(7):0.03Eu(3+) excited at 392nm is about twice as strong as that of Y(2)O(3):0.05Eu(3+) commercial red phosphor. The color coordinates, quantum yield and lifetime for Ca(9)Y(0.97)(PO(4))(7):0.03Eu(3+) were measured. All the spectrum features indicate that Ca(9)Y(PO(4))(7):Eu(3+) might be a promising phosphor for display devices or w-LEDs.
红色荧光粉 Ca(9)Y(PO(4))(7):Eu(3+) 通过高温固相反应合成。X 射线衍射分析表明，掺杂 3mol%Eu(3+)的 Ca(9)Y(PO(4))(7)（Ca(9)Y(0.97)(PO(4))(7):0.03Eu(3+)）为纯正交相。光致发光研究表明，613nm 的电偶极跃迁((5)D(0)→(7)F(2))强度超过 594nm 的磁偶极跃迁((5)D(0)→(7)F(1))。发现 Eu(3+)的最佳掺杂浓度为 3mol%时，发光强度最高。PL 激发光谱由 Eu-O 的 CT 和 Eu(3+)离子的激发线组成。最强的激发线出现在 392nm 处。在 392nm 激发下，Ca(9)Y(0.97)(PO(4))(7):0.03Eu(3+)的发射光谱积分强度约为商用红色荧光粉 Y(2)O(3):0.05Eu(3+)的两倍。测量了 Ca(9)Y(0.97)(PO(4))(7):0.03Eu(3+)的色坐标、量子产率和寿命。所有光谱特征表明，Ca(9)Y(PO(4))(7):Eu(3+)可能是一种有前途的显示器件或 w-LED 用荧光粉。
