Synthesis, structure and NIR luminescence properties of Yb3+ and Bi3+-activated vanadate GdVO4
来源期刊：JOURNAL OF RARE EARTHS2016年第8期
论文作者：K.Lenczewska M.Stefanski D.Hreniak
文章页码：837 - 842
摘 要：Near-infrared emission of Yb3+ and Bi3+-co-doped GdVO4 vanadate phosphors obtained via the modified Pechini’s method was reported. The phase purity and structure of samples were characterized by X-ray powder diffraction（XRD）, X-ray energy dispersion spectroscopy（EDS）, scanning electron microscopy（SEM）, Raman and infrared（IR） spectroscopy. Photoluminescence emission（PL） and excitation（PLE） spectra were recorded and investigated in details. Results indicated that upon near-UV excitation（340 nm） in the(Bi3+-V5+) charge transfer state this phosphor had a strong broad band yellow-green emission（3P1→1S0） of Bi3+ ions and also NIR emission(2F5/2→2F7/2) of Yb3+ ions in the range of 950–1050 nm, which matched well with the spectral response of the silicon-based solar cells. The decreasing Bi3+ emission with increasing Yb3+ concentration proved the occurrence of energy transfer from Bi3+ to Yb3+ ions. Results demonstrated that Yb3+ and Bi3+-co-doped GdV O4 vanadate phosphors might act as a NIR down-conversion（DC） solar spectral converter to enhance the efficiency of the silicon-based solar cells.
K.Lenczewska，M.Stefanski，D.Hreniak
Institute of Low Temperature and Structural Research, Polish Academy of Sciences
摘 要：Near-infrared emission of Yb3+ and Bi3+-co-doped GdVO4 vanadate phosphors obtained via the modified Pechini’s method was reported. The phase purity and structure of samples were characterized by X-ray powder diffraction（XRD）, X-ray energy dispersion spectroscopy（EDS）, scanning electron microscopy（SEM）, Raman and infrared（IR） spectroscopy. Photoluminescence emission（PL） and excitation（PLE） spectra were recorded and investigated in details. Results indicated that upon near-UV excitation（340 nm） in the(Bi3+-V5+) charge transfer state this phosphor had a strong broad band yellow-green emission（3P1→1S0） of Bi3+ ions and also NIR emission(2F5/2→2F7/2) of Yb3+ ions in the range of 950–1050 nm, which matched well with the spectral response of the silicon-based solar cells. The decreasing Bi3+ emission with increasing Yb3+ concentration proved the occurrence of energy transfer from Bi3+ to Yb3+ ions. Results demonstrated that Yb3+ and Bi3+-co-doped GdV O4 vanadate phosphors might act as a NIR down-conversion（DC） solar spectral converter to enhance the efficiency of the silicon-based solar cells.
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