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[Up-conversion luminescent properties of SrAl2O4: Eu2+, Dy3+ phosphors]
Yun-qi Ma1, Guang-shun Yi, Bao-quan Sun
1Department of Chemistry, Tsinghua University, Beijing 100084, China.
Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|September 5, 2003
Abstract:
Strong green up-conversion emission was observed for the first time in europium and dysprosium co-doped strontium aluminate (SrAl2O4: Eu2+, Dy3+) phosphor under 980 nm infrared excitation at room temperature. The up-conversion emission spectrum of phosphors was quite different from that of down-conversion emission spectrum excited by ultraviolet or visible lights. The two kinds of emission spectra implied that there are different mechanisms of emission. The X-ray diffraction (XRD) results revealed that the prepared phosphor has the same crystal lattice and composition as that reported previously.