Journal
OPTICAL MATERIALS EXPRESS
Volume 5, Issue 11, Pages 2616-2624Publisher
Optica Publishing Group
DOI: 10.1364/OME.5.002616
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Funding
- National Natural Science Foundation of China [51502091]
- Fundamental Research Funds for the Central Universities [WD1314055, WD1313009]
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Eu3+-doped Gd2O2CN2 was firstly synthesized by a classical solid-state reaction of Li2CO3, Eu2O3 and GdF3 under NH3 gas flow in the presence of graphite at low firing temperature. Powder X-ray diffraction (XRD) analysis indicated that Gd2O2CN2: Eu3+ crystallizes in a trigonal-type structure with space group P-3m1. Gd2O2CN2: Eu3+ shows a sharp red emission band peaking at 626 nm under excitation at 300 nm at room temperature. PL spectra indicates that Eu3+ doped Gd2O2CN2 samples emit the typical emission peaks at 614 nm and 626 nm originated from the hypersensitive electric dipole transition (D-5(0) -> F-7(2)) of Eu3+ ions. The optimized doping concentration of Eu3+ ions was found to be 7.5 at. %, and the critical transfer distance was calculated to be 10.907 angstrom. (C) 2015 Optical Society of America
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