• Title/Summary/Keyword: ${Zn_2}{SiO_4}$:Mn

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Effects of Activators and Heat Treatment on the Luminous Properties of $Zn_2SiO_4$ Phosphors (활성제 및 열처리효과가 $Zn_2SiO_4$ 형광체의 발광특성에 미치는 영향)

  • Park, Chan-Hyuk;Chung, Sung-Mook;Kim, Young-Jin;Song, Kuk-Hyun;Lee, Joon
    • Korean Journal of Crystallography
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    • v.13 no.2
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    • pp.63-68
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    • 2002

  • Zn/sub 2-x/Mn/sub x/SiO/sub 4/ phosphors for PDP were synthesized by solid state reaction method. The effects of firing temperature, ratio of hydrogen gas to nitrogen for heat treatment and concentration of activator and co-dopants on the luminous properties have been investigated. It was found that the phosphor fabricated at 1400℃ with x = 0.002 Mn concentration had a maximum brightness. Luminous properties of a phosphor were improved when Cr/sup 3＋/ was added as a co-dopant rather than other co-dopants.

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Photoluminescent Properties of $\textrm{Zn}_{2}\textrm{SiO}_{4}$: Mn Green Phosphors doped with Ga (Ga 도핑된 $\textrm{Zn}_{2}\textrm{SiO}_{4}$: Mn 녹색 형광체의 발광특성)

  • Park, Eung-Seok;Jang, Ho-Jeong;Jo, Tae-Hwan
    • Korean Journal of Materials Research
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    • v.8 no.9
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    • pp.860-864
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    • 1998

  • We investigated the photoluminescence and the crystalline properties with Ga doping concentrations (0-12 mol%) in $\textrm{Zn}_{1.98}\textrm{Mn}_{0.02}\textrm{SiO}_{4}$ green phosphors prepared by the solid state reaction. The photoluminescence was improved by a doping of Ga element in $\textrm{Zn}_{1.98}\textrm{Mn}_{0.02}(\textrm{Si_{1-x}\textrm{Ga}_{x})\textrm{O}_{4}$ phosphors which showed the highest emission intensity and good color purity in the doping concentration of x=0.08. The emission intensity of $\textrm{Zn}_{1.98}\textrm{Mn}_{0.02}(\textrm{Si_{1-x}\textrm{Ga}_{x})\textrm{O}_{4}$(x= 0.08) phosphors was increased to 7 times with increasing the sintering temperatures from $1100^{\circ}C$ to $1400^{\circ}C$, showing the improved crystalline quality. The decay time was not affected by Ga doping concentrations with constant values around 24ms. It was found from SEM and PSA analyses that the phosphors were composed of a large number of small grains around 1-3$10\mu\textrm{m}$ with a small amounts of agglomerated particles above $10\mu\textrm{m}$.

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