Sr_2MgSiO_5:(Eu^(2+),Mn^(2+))单一基质白光荧光粉的发光性质

LUMINESCENT PROPERTIES OF THE SINGLE WHITE EMITTING PHOSPHOR Sr_2MgSiO_5:(Eu^(2+),Mn^(2+))

研究了Eu2+,Mn2+共激活的单一基质Sr2MgSiO5白光发光材料的发光性质。Eu2+中心形成峰值分别为459,555nm的特征宽带,而Eu2+中心向Mn2+中心的能量传递导致了峰值为678nm的发射,3个谱带叠加从而在单一基质中得到了白光。其激发光谱分布在250～450nm的波长范围,峰值位于390nm,可以被InGaN管芯产生的380～410nm辐射有效激发。Sr2MgSiO5:(Eu2+,Mn2+)是一种性能良好的单一基质白光发光二极管用荧光粉。

The luminescence properties of single white emitting phosphor Eu^2＋,Mn^2＋ co-activated Sr2MgSiO5 were studied. The emission peaks that located at 459nm and 555nm originated from the center of the Eu^2＋, while the 678nm emission was attributed to the energy transfer from Eu^2＋ to Mn^2＋. White light could be obtained by mixing the three emission colors of blue （459nm）, green （555 nm） and red （678 nm） in the single host. The excitation bands of the three emission colors were all extended from 250nm to 450nm, and their peaks were all located at around 390 nm. Phosphor can be excited effectively by InGaN chips in the range of 380-410nm. The experimental results show that the Sr2MgSiO5：（Eu^2＋,Mn^2＋） is a single host phosphor with superior properties for white light emitting diodes.