稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
Journal of Rare Earths
2015年
11期
1129-1136
,共8页
杨凤丽%安炜%李宏彦%HU Yunsheng%胡运生%徐会兵%叶信宇%庄卫东%荆西平
楊鳳麗%安煒%李宏彥%HU Yunsheng%鬍運生%徐會兵%葉信宇%莊衛東%荊西平
양봉려%안위%리굉언%HU Yunsheng%호운생%서회병%협신우%장위동%형서평
LED phosphors%Eu2+-Mn2+co-doping%apatite%synthetic temperature%heating time%rare earths
To further understand the energy loss mechanism of the“charge transfer process”that was proposed in our previous work on Eu2+-Mn2+co-doped phosphors, the influence of synthetic temperature and heating time on the photoluminescence (PL) behavior of M5(PO4)3Cl:Eu2+,Mn2+(M=Ca, Sr) phosphors was investigated by analyzing their PL spectra and decay curves. For the Ca phase, an increase in the synthetic temperature resulted in an increase in the loss from the“charge transfer process”since more Eu2+ions were involved in the Eu2+-Mn2+clusters. This was contrary to the thermodynamic expectation. To solve this contradiction, we pro-posed that the formation of Eu2+-Mn2+clusters was kinetically blocked at lower synthetic temperatures. With an increase in heating time for the phosphors synthesized at lower temperature (such as 1100 °C) the PL intensity decreased, which supported the above as-sertion.
