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Effect of Gd 3+ , Bi 3+ , or Sm 3+ on luminescent properties of La 2− x MgTiO 6 : x Eu 3+ phosphors
Author(s) -
Xie Huidong,
Su Binbin,
Tan Yurong,
Zhao Yajuan,
Chai Shouning
Publication year - 2018
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.3556
Subject(s) - phosphor , chromaticity , analytical chemistry (journal) , luminescence , excited state , doping , fluorescence , materials science , ion , chemistry , optics , physics , optoelectronics , atomic physics , organic chemistry , chromatography
Single phase of Bi 3+ , Gd 3+ , Sm 3+ and Eu 3+ co‐doped La 2 MgTiO 6 red phosphors were synthesized by high temperature solid‐state method. The phase composition, morphology and fluorescent properties of the phosphors were analyzed by X‐ray diffraction (XRD), scanning electron microscopy (SEM) and fluorescence spectrometer. The La 2‐ x MgTiO 6 : x Eu 3+ phosphors can be excited by UV (396 nm) and blue (465 nm) light‐emitting diode (LED) chips and show a strong red emitting with dominated wavelength at 615 nm. The optimum doping concentration of Eu 3+ ion for La 2 MgTiO 6 is x = 0.5. The luminescent intensities of 5 D 0 → 7 F 2 transition of Eu 3+ in La 1.5‐ y MgTiO 6 :0.5Eu 3+ , y Bi 3+ /Gd 3+ /Sm 3+ were 1.31 times, 1.32 times and 1.88 times that of La 1.5 MgTiO 6 :0.5Eu 3+ at y = 0.08, 0.06, 0.06 for Bi 3+ , Gd 3+ , or Sm 3+ sensitizer, respectively. The chromaticity coordinates of La 1.44 MgTiO 6 :0.5Eu 3+ , 0.06Sm 3+ , (0.6342, 0.3513) were very close to those of the National Television Standard Committee (NTSC) standard red light coordinates.