期刊
OPTICAL MATERIALS EXPRESS
卷 4, 期 10, 页码 2102-2107出版社
OPTICAL SOC AMER
DOI: 10.1364/OME.4.002102
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资金
- Natural Science Foundation of Jiangsu Province of China [BK20140456]
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [14KJD140002, 13KJB140002]
Ca8MgLa(PO4)(7):Eu2+, Mn2+ phosphors were prepared by solid-state reaction method, and their luminescence properties were studied. The optical bandgap of the Ca8MgLa(PO4)(7) host was determined to be about 5.34 eV experimentally. For Eu2+ single-doped samples, broad yellow emission bands were found from 400 to 800 nm, derived from various Eu2+ emission centers in different Ca2+ sites. The corresponding excitation spectra exhibit strong and broad absorption in near ultraviolet region with a red-shift depending on the monitoring wavelengths. For Eu2+-Mn2+ codoped samples, extremely efficient energy transfer from Eu2+ to Mn2+ was found, and tunable emission was realized with the emitting light color ranging from yellow to red. In sum, the investigation results of Ca8MgLa(PO4)(7):Eu2+, Mn2+ phosphors indicate their promising applications in white LEDs. (C) 2014 Optical Society of America
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