Ca_(10)(Si_2O_7)_3Cl_2:Eu_^(2+),Mn^(2+)单一基质白光荧光粉的发光性质

Luminescence Properties of single host White Phosphor Ca_(10)(Si_2O_7)_3Cl_2:Eu^(2+), Mn^(2+)

用高温固相法合成了颜色可调的Ca10(Si2O7)3Cl2:xEu2+,yMn2+荧光粉。研究了它的发光性质和Eu2+与Mn2+之间的能量传递。Eu2+离子在Ca10(Si2O7)3Cl2晶体中形成了峰值为426nm和523nm的5d→4f跃迁发光,Eu2+中心向Mn2+中心传递能量,敏化Mn2+离子4T1(4G)→6A1(6S)跃迁而产生585nm的黄光发射。黄绿蓝3个发射带叠加在单一基质中实现了白光发射。3个发射带的激发谱范围位于250～480nm处,Ca10(Si2O7)3Cl2:xEu2+,yMn2+在紫外-近紫外波段(350～410nm)范围内有很强的激发,是一种适合InGaN管芯激发的单一基质白光LED荧光粉。

The Ca10 （ Si2O7 ） 3Cl2 ： Eu^2 ＋ Mn^2＋ phosphors was synthesized by high temperature solid state reaction. The luminescence properties and energy transfer between Eu^2＋ wend Mn^2＋ were investigated The emission bands of this phosphor peaked at 426, 523 and 585 nm were originated from 5d→4f transition of Eu^2＋ and 4T1 （4G）→＋6A1 （6S） transition of Mn2. , respectively. The emission colors were tuned through concentration variation of luminescent centers in Ca10 （ Si2O7 ） 3Cl2 ： Eu^2 ＋ Mn^2＋ color tuning was originated mong luminescent centers. phosphors. The white light from the energy transfer a- Our full-color-emitting and color-tunable phosphors could be used in the application of white-light-emitting diode by the UV LED phosphor technology.