Luminescence properties of $ZnGa_{2}O_{4}$ based phosphors

  • Singh Binod Kumar (Advance Materials Division, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Ryu Hojin (Advance Materials Division, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Chang Ho-Jung (Dept. Electronics Engineering, Dankook University)
  • 발행 : 2005.09.01

초록

Phosphor powders of zinc gal late added with Mg and rare-earth elements were prepared by sol id state reaction to improve luminescent properties. Green emitting $ZnMnGa_{2}O_{4}$ reached maximum intensity at Mn=0,005 mole$\%$ and further improvement was achieved by addition of $Mg^{2+}$. Tm, Mg-added zinc gallate phosphor exhibited a strong blue band emission, peaking at about 420 nm with the maximum intensity at the concentration of 0.003 mole$\%$ Mg and 0.015 mole$\%$ Tm. Deepening of the potential wells of the ground and excited states was suggested to be the cause for the enhancement in emission intensity at optimal doping of Mg and Tm.

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