스컬용융법에 의한 SrAl2O4: Eu +2 ,Dy +3 축광성 형광체 합성
Synthesis of long afterglow phosphor SrAl2O4 : Eu +2 ,Dy +3 by skull melting method
1
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
스컬용융법으로 SrAl2O4: Eu 2+ ,Dy 3+ 형광체 합성을 하였으며, 합성한 형광체의 산화물 몰비는 SrCO3 : Al(OH)3 : Eu2O3: Dy2O3= 1 : 2 : 0.015 : 0.02였다. 결정구조 및 표면 형상은 X-선 회절분석과 주사전자현미경으로 규명하였다. 합성한SrAl2O4: Eu 2+ ,Dy 3+의 광학적 특성인 여기, 발광 및 장잔광 특성의 심도 있는 연구를 위해 PL(photoluminescence) 분광계로측정하였다. PL 측정을 통해 360 nm 영역에서 여기(excitation)되고, 300~420 nm의 파장까지 여기가 일어남을 확인하였다. 발광(emission)스펙트럼은 450~600 nm의 파장에서 폭넓은 스펙트럼을 보였으며, 530 nm에서 최대 발광파장을 나타내었다. SrAl2O4: Eu 2+ ,Dy 3+ 형광체는 오랜 시간 동안 발광하는 장잔광 특성을 나타내었다.
Abstract
SrAl2O4 : Eu 2+ ,Dy 3+ phosphorescent phosphors were synthesized by skull melting method. The molar ratio of oxides in the phosphors synthesized by the skull melting technique was SrCO3 : Al(OH)3: Eu2O3: Dy2O3= 1 : 2 : 0.015 : 0.02. Crystal structure and surface morphology were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis. Optical properties of the synthesized SrAl2O4: Eu 2+ ,Dy 3+ were measured by photoluminescence (PL) spectrometer for in-depth study on the excitation, emission and afterglow properties. From the PL measurements, it was found that excitation occurred in the wavelength range from 300 to 420 nm with peak position at 360 nm. The emission spectrum showed a broad curve in the wavelength from 450 to 600 nm with peak position at 530 nm. SrAl2O4: Eu 2+ ,Dy 3+ phosphors exhibited afterglow properties with emission that lasted for a long period.
참고문헌 (13)
- T. R. N. Kutty, "Luminescence of Eu 2+in strontium aluminates prepared by the hydrothermal method", Mat. Res. Bull., 25(11), pp.1355~ (1990)
- 김진호, "SrAl2O4: Eu 2+, Dy 3+ 축광안료의 고온안정성에 관한 연구", 한국세라믹학회지, 51(6), pp.618~622 (2014), 한국세라믹학회[DOI]
- Y.Y. Choi, "Synthesis and characterization of long phosphorescent oxide phosphors activated with rare earth elements", pp.2004
- P. Boutinaud, "Spectroscopic investigations on SrAl2O4 polymorphs", J. Lumin., 159, pp.158~ (2015)
- Z. Yanan, "Effect of light conversion agent on luminous properties of a new down-converting material SrAl2O4: Eu 2+,Dy 3+", light conversion agent, 2016, pp.34(5), 483~
- L. K. S. de Herval, "Enhancement of the luminescence intensity by co-doping Mn 2+into Er 3+-doped SrAl2O4", J. Lumin., 163, pp.17~ (2015)
- A. Douy, "Crystallisation of spray-dried amorphous precursors in the SrO-Al2O3 system: a DSC study", J. Eur Ceram. Soc., 23(12), pp.2075~ (2003)
- H. Du, "Optimization and complexing agent-assisted synthesis of green SrAl2O4: Eu 2+,Dy 3+phosphors through sol-gel process", J. Lumin., 176, pp.272~ (2016)
- A. Baermann, "Characterization of different (Me,Zr)O2 single crystals grown by the “skull-melting” technique", J. Cryst. Growth, 79(1), pp.331~ (1986)
- V.I. Aleksandrov, "Melting refractory dielectrics by direct high-frequency heating in a “cold” container", Izv. AKad. Nauk SSSR, (2), pp.235~ (1973)
- A. Nag, "Role of B2O3 on the phase stability and long phosphorescence of SrAl2O4: Eu,Dy", J. Alloys and Comp., 354, pp.221~ (2003)
- J. Hölsä, "Persistent luminescence of Eu 2+doped alkaline earth aluminates, MAl2O4: Eu 2+", J. of Alloy. Compd., 323, pp.326~ (2001)
- E. Nakazawa, "Traps in SrAl2O4 : Eu 2+phosphor with rare-earth ion doping", J. Lumin., 72, pp.236~ (1997)