Optoelectronics Letters, Volume. 11, Issue 1, 45(2015)
Luminescence and energy transfer of Ce3+-Eu2+in Ca9Al(PO4)7
A series of Ce3+, Eu2+and Ce3+-Eu2+doped Ca9Al(PO4)7phosphors are synthesized by a high temperature solid-state method. Under 291 nm excitation, Ca9Al(PO4)7:Ce3+has one emission band at 356 nm, which is attributed to 4f05d1→4f1 transition of Ce3+. Under 305 nm excitation, Ca9Al(PO4)7:Eu2+presents one emission band at 445 nm, which is assigned to 4f 65d1→4f 7 transition of Eu2+. Energy transfer from Ce3+to Eu2+in Ca9Al(PO4)7is validated and proved to be a resonant type via a quadrupole-quadrupole interaction. Critical distance (Rc) of Ce3+to Eu2+in Ca9Al(PO4)7is calculated to be 1.264 nm. Moreover, the emission intensity of Ca9Al(PO4)7:Ce3+, Eu2+can be tuned by properly adjusting the relative doping composition of Ce3+/Eu2+.
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MENG Xiang-yu, JIE Xi, ZHANG Yue-dong, WANG Di, WANG Ying-bin, LI Pan-lai, WANG Zhi-jun, PANG Li-bin, GAO Shao-jie. Luminescence and energy transfer of Ce3+-Eu2+in Ca9Al(PO4)7[J]. Optoelectronics Letters, 2015, 11(1): 45
Received: Oct. 27, 2014
Accepted: --
Published Online: Oct. 12, 2017
The Author Email: Zhi-jun WANG (wangzj1998@sohu.com)