掺杂Pb2对YAG∶ Ce3+,Pr3+黄色荧光粉中红光发射的影响

人工晶体学报, 2015, 44(4): 902-907.

掺杂Pb2对YAG∶ Ce3+,Pr3+黄色荧光粉中红光发射的影响

李敏 ^1, , 王磊 ^2, , 黄平 ^3, , 郝虎在 ^4, , 田跃 ^5, , 崔彩娥 ^6,

1.太原理工大学物理与光电工程学院,太原,030024

2.太原理工大学物理与光电工程学院,太原030024;太原理工大学新型传感器与智能控制教育部与山西省重点实验室,太原030024

3.太原理工大学物理与光电工程学院,太原030024;太原理工大学新型传感器与智能控制教育部与山西省重点实验室,太原030024

4.太原理工大学物理与光电工程学院,太原,030024

5.太原理工大学物理与光电工程学院,太原030024;太原理工大学新型传感器与智能控制教育部与山西省重点实验室,太原030024

6.太原理工大学物理与光电工程学院,太原030024;太原理工大学新型传感器与智能控制教育部与山西省重点实验室,太原030024

基金项目: 山西省自然科学基金(2013021004-2,2014011017-3) 国家自然科学基金(51072128) 山西省科技攻关项目(20110321040-01)

关键词： YAG , 还原气氛 , 发射光谱 , 能量传递 , 显色指数

Influence of Pb2+ Doping on Red Emission of YAG∶ Ce3+, Pr3+ Yellow Phosphors

Keywords： YAG , reducing atmosphere , emission spectrum , energy transfer , color rendering index

在一氧化碳还原气氛下,通过高温固相法合成了YAG∶ Ce3+,Pr3+,Pb2+黄色荧光粉.通过X射线衍射和激发、发射光谱对样品进行表征.结果表明:在YAG∶ Ce3+,Pr3+荧光粉中掺杂一定量的PbO,可以使Ce3+的534 nm宽带发生红移,同时Pr3+在610 nm处的红光发射强度增强,这是由于Pb2+的加入影响了晶体场环境,从而导致Ce3+ 5d能级的重心下移,使Ce3+发射光谱与Pr3+激发光谱的交叠增加,提高了Ce3+-Pr3+能量传递的效率.当掺杂PbO的浓度为x=0.04时,红移最强,红黄比值最大,有利于提高基于蓝光芯片和YAG∶ Ce黄光荧光粉制备的白光LED的显色指数.

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