Abstract
A series of Ce3+, Eu2+ and Ce3+-Eu2+ doped Ca9Al(PO4)7 phosphors 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 4f65d1→4f7 transition of Eu2+. Energy transfer from Ce3+ to Eu2+ in Ca9Al(PO4)7 is validated and proved to be a resonant type via a quadrupole-quadrupole interaction. Critical distance (R c) of Ce3+ to Eu2+ in Ca9Al(PO4)7 is 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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This work has been supported by the National Natural Science Foundation of China (No.50902042), and the Natural Science Foundation of Hebei Province in China (Nos.A2014201035 and E2014201037), and the Education Office Research Foundation of Hebei Province in China (Nos.ZD2014036 and QN2014085).
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Meng, Xy., Jie, X., Zhang, Yd. et al. Luminescence and energy transfer of Ce3+-Eu2+ in Ca9Al(PO4)7 . Optoelectron. Lett. 11, 45–48 (2015). https://doi.org/10.1007/s11801-015-4198-8
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DOI: https://doi.org/10.1007/s11801-015-4198-8