• 제목/요약/키워드: ZnGa2O4:Mn,O

검색결과 42건 처리시간 0.026초

열처리조건과 기판이 $ZnGa_O_4:Mn$ 박막 형광체의 발광특성에 미치는 영향 (Effects of heat treatment and substrates on luminescent characteristics of $ZnGa_O_4:Mn$ thin film phosphor)

  • 정승묵;김영진
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2004년도 춘계학술대회 논문집 디스플레이 광소자분야
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    • pp.181-184
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    • 2004
  • The green emitting phosphor, $ZnGa_2O_4:Mn$ thin film with spinel structure were deposited by rf magnetron sputtering. Thin film phosphors were heat-treated in nitrogen, vacuum and air atmosphere, respectively. The effects of the substrates, heat-treatment conditions and the sputtering parameters were investigated. The growing behavior and luminescent properties of thin films depend on the crystallinity of the substrates. The Ga/Zn atomic ratios and luminescent characteristics were dependent on the annealing conditions.

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

  • 박응석;장호정;조태환
    • 한국재료학회지
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    • 제8권9호
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    • pp.860-864
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    • 1998
  • 고상 반응법에 의해 제조된 $\textrm{Zn}_{1.98}\textrm{Mn}_{0.02}\textrm{SiO}_{4}$ 녹색 형광체에 Ga 원소를 치환시켜 소성온도 및 Ga의 첨가량에 따른 발광특성과 결정특성을 조사하였으나, $\textrm{Zn}_{1.98}\textrm{Mn}_{0.02}(\textrm{Si_{1-x}\textrm{Ga}_{x})\textrm{O}_{4}$ 형광체에 있어서 Ga을 첨가했을 경우가 첨가하지 않은 샘플에 비해 발광특성이 개선되었으며, 8mol%(x=0.08) Ga을 첨가했을 때 발광세기와 색순도에서 가장 우수한 특성을 보였다. $\textrm{Zn}_{1.98}\textrm{Mn}_{0.02}(\textrm{Si_{1-x}\textrm{Ga}_{x})\textrm{O}_{4}$ 형광체(x=0.08)에 대해서 소성온도를 $1100^{\circ}C$에서 $1400^{\circ}C$로 증가함에 따라 결정성이 개선되었으며 발광강도 역시 약 7배 이상 크게 증가하였다. 잔광시간은 Ga 첨가량에 관계없이 약 24 ms로 거의 변화가 없었다. 입도분석 결과 1-3$\mu\textrm{m}$의 작은 입자가 주로 관찰되었으며 10$\mu\textrm{m}$이상의 큰 응집입자도 소량 존재하였다.

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활성제 첨가에 따른 $ZnGa_2O_4$ 형광체의 발광특성 (Cathode Luminescence Characteristics of $ZnGa_2O_4$ Phosphors with the doped activator)

  • 홍범주;이승규;김경환;박용서;최형욱
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2005년도 추계학술대회 논문집 Vol.18
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    • pp.301-302
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    • 2005
  • The $ZnGa_2O_4$:Cr phosphor was synthesized through solid-state reactions at the various molar ratio of Cr from 0.002 % to 0.01 %. The XRD patterns show that the Cr-doped $ZnGa_2O_4$ has a (311) main peak and a spinel phase. Also the emission wavelength shills from 510 to 705 nm in comparison with $ZnGa_2O_4$:Mn when Cr is doped in $ZnGa_2O_4$. These results indicate that $ZnGa_2O_4$ phosphors hold promise for potential applications in field-emission display devices with high brightness operating in full color regions.

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Effect of $Mg^{2+}$ co-doping on luminescent properties of $ZnGa_2O_4:Mn^{2+}$

  • Singh, Binod Kumar;Bartwal, Kunwar Singh;Ryu, Ho-Jin
    • 반도체디스플레이기술학회지
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    • 제6권4호
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    • pp.29-32
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    • 2007
  • Zinc gallate, $ZnGa_2O_4:Mn^{2+}$ co-doped with different concentrations of $Mg^{2+}$ (0.001- 0.5 mol%) was prepared by solid state synthesis method. These compositions were investigated for their photoluminescence and cathodoluminescence properties. The optimized composition $Zn_{0.990}Mg_{0.005}Ga_2O_4:Mn_{0.005}$ shows higher luminescence intensity compared to the parent phosphor. The intense green emission peak was found at 504 nm. The $Mg^{2+}$ doping does not affect much the decay time. It remains <10 ms for these compositions which make them potential candidate for application in TV screens.

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