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Ba2Mg(PO4)2:Eu 형광체의 합성과 자외선 여기하의 발광특성 KCI 등재 SCOPUS

Preparation of Ba2Mg(PO4)2:Eu Phosphors and Their Photoluminescence Properties Under UV Excitation

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한국재료학회지 (Korean Journal of Materials Research)
한국재료학회 (Materials Research Society Of Korea)
초록

For possible applications as luminescent materials for white-light emission using UV-LEDs, Ba2Mg(PO4)2:Eu2+ phosphors were prepared by a solid state reaction. The photoluminescence properties of the phosphor were investigated under ultraviolet ray (UV) excitation. The prepared phosphor powders were characterized to from a single phase of a monoclinic crystalline structure by a powder X-ray diffraction analysis. In the photoluminescence spectra, the Ba2Mg(PO4)2:Eu2+ phosphor showed an intense emission band centered at the 584 nm wavelength due to the f-d transition of the Eu2+ activator. The optimum concentration of Eu2+ activator in the Ba2Mg(PO4)2 host, indicating the maximum emission intensity under the excitation of a 395 nm wavelength, was 5 at%. In addition, it was confirmed that the Eu2+ ions are substituted at both Ba2+ sites in the Ba2Mg(PO4)2 crystal. On the other hand, the critical distance of energy transfer between Eu2+ ions in the Ba2Mg(PO4)2 host was evaluated to be approximately 19.3 A. With increasing temperature, the emission intensity of the Ba2Mg(PO4)2:Eu phosphor was considerably decreased and the central wavelength of the emission peak was shifted toward a short wavelength.

저자
  • 태세원 | Tae, Se-Won
  • 정하균 | 정하균
  • 최성호 | 최성호
  • 허남회 | 허남회