Ca_8Mg(SiO_4)_4Cl_2∶Eu^(2+),Ce^(3+),Mn^(2+)绿色荧光粉发光性能及其应用研究

Study on Luminescence Properties and Application of Green Phosphors Ca_8Mg(SiO_4)_4Cl_2∶Eu^(2+),Ce^(3+),Mn^(2+)

利用高温固相法,合成出Eu2+、Ce3+、Mn2+共掺的Ca8Mg(SiO4)4Cl2系列绿色荧光粉。通过XRD表征了这些荧光粉的结构,通过分子荧光光谱仪研究了它们的室温发光性能。首先调查了Eu2+掺杂的Ca8Mg(SiO4)4Cl2绿色荧光粉发光性能,随后引入Ce3+、Mn2+提高了Ca8Mg(SiO4)4Cl2∶Eu2+在紫外光区的吸收强度及绿光发射强度。最后将筛选出来的荧光粉与InGaN-LED芯片组装制作成单一绿光LED器件,利用Ca7.8215MgSi4O16Cl2∶0.0525Eu2+,0.056Ce3+,0.070Mn2+所制作成的绿光LED器件发光最强,在20mA电流激发下,此LED发很强的绿光,其电致发光光谱所对应的色坐标值为:x=0.26,y=0.55。

Green phosphors Ca8Mg（ SiO4）4Cl2doped with Eu2 ＋,Ce3 ＋,Mn2 ＋were synthesized via a conventional solid state method at high temperature. The structure and luminescence properties were studied by XRD and molecular fluorescence spectrometer. The excitation and emission spectra of Ca8Mg（ SiO4）4Cl2∶ Eu2 ＋were studied. The luminescence properties of these green phosphors were optimized by co-doped Eu2 ＋,Ce3 ＋,Mn2 ＋. Finally,the green LEDs were fabricated by combining In Ga N-LEDs with these green phosphors. The green LED based on Ca7. 8215 MgSi4O16Cl2∶ 0. 0525Eu2 ＋,0. 056Ce3 ＋,0.070Mn2 ＋shows intense green emission at the current of 20 mA,which can be observed by naked eyes.Its CIE chromaticity coordinates are x = 0. 26,y = 0. 55.