Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Preparation and Properties of Eu3+ Doped Y2O3 Nanoparticles with a Solvothermal Synthesis Using the Ethylene Glycol

에틸렌 글리콜을 이용하여 용매열 합성으로 Eu3+가 도핑된 Y2O3 나노 입자의 제조 및 특성

  • 신수철 (단국대학교 공업화학과) ;
  • 조태환 (단국대학교 공업화학과)
  • Published : 2003.07.01
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Abstract

Eu doped $Y_2$ $O_3$ nanoparticles were prepared with the solvothermal synthesis using the ethyleneglycol solvent at 20$0^{\circ}C$ for 3-5 h and then annealed in air at 1000-140$0^{\circ}C$ for 2-4 h. The X-ray diffraction pattern of annealed crystals at 100$0^{\circ}C$ for 2 h could be indexed as pure cubic cell of $Y_2$ $O_3$ phase with lattice parameters a=10.5856 $\AA$ which is very close to the reported data (JCPDS Card File, 41-1105 a=10.6041 $\AA$). Average size of prepared phosphor particles have about 100 nm, which were spherical morphology. The phosphor particle sizes decreased and the emission intensity increased at the annealing temperature. Though PL spectrum analysis, the 3% Eu doped $Y_{2-x}$ $O_3$:E $u_{x}$ $^{3+}$(x=0.06) phosphor showed the excitation spectrum at 250 nm wavelength and the maximum emission spectrum at 611 nm wavelength.

에틸렌글리콜을 용매로 하여 용매열 합성으로 20$0^{\circ}C$에서 3-5시간 반응시킨 후 1000-140$0^{\circ}C$에서 2-4시간동안 대기 중에서 열처리 과정으로 Eu가 도핑된 $Y_2$ $O_3$ 나노 입자는 제조되었다. 100$0^{\circ}C$에서 열처리한 결정의 X-선 회절패턴은 보고되어진 데이터(JCPDS 카드파일 41-1105, a=10.6041 $\AA$)와 거의 일치하는 격자상수 a=10.5856 $\AA$으로 순수한 큐빅 $Y_2$ $O_3$ 상을 나타내었다. 제조된 적색 형광체의 평균입자의 크기는 대략 100 nm로 구형의 형태를 가진다 열처리 온도가 증가함에 따라 형광체 입자의 크기가 감소하였고, 열처리 온도가 증가함에 따라 형광체의 발광 세기가 증가하였다. PL 스펙트럼 분석을 통해 Eu의 농도가 3 ㏖% 도핑된 $Y_2$ $O_3$은 250 nm 파장에서 여기 스펙트럼을 나타내었고 611 nm 파장에서 주발광 스펙트럼을 나타내었다.

Keywords

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