Li-DOPING EFFECT ON THE CATHODOLUMINESCENT PROPERTIES OFY2O3:Eu3+PHOSPHORS

J. S. Bae, J. H. Yoon, S. K. Park, J. P. Kim, E. D. Jeong, M. S. Won, J. H. Jeong (), K. S. Shim, H. K. Yang and S. S. Yi
Additional contact information
J. S. Bae: Busan Center, Korea Basic Science Institute, Busan 609-735, South Korea
J. H. Yoon: Busan Center, Korea Basic Science Institute, Busan 609-735, South Korea
S. K. Park: Busan Center, Korea Basic Science Institute, Busan 609-735, South Korea
J. P. Kim: Busan Center, Korea Basic Science Institute, Busan 609-735, South Korea
E. D. Jeong: Busan Center, Korea Basic Science Institute, Busan 609-735, South Korea
M. S. Won: Busan Center, Korea Basic Science Institute, Busan 609-735, South Korea
J. H. Jeong: Department of Physics, Pukyong National University, Busan 608-737, Korea
K. S. Shim: Department of Physics, Pukyong National University, Busan 608-737, Korea
H. K. Yang: Department of Physics, Pukyong National University, Busan 608-737, Korea
S. S. Yi: Department of Electronic Materials Engineering, Silla University, Busan 612-736, Korea

Surface Review and Letters (SRL), 2007, vol. 14, issue 04, 535-538

Abstract: Influence of lithium doping on the crystallization, the surface morphology, the chemical states and the luminescent properties ofY2O3:Eu3+phosphors was investigated. The structural, surface morphology characteristics and chemical states of the phosphors were analyzed by using X-ray diffraction (XRD), scanning electron microscope (SEM), and X-ray photoelectron spectroscopy (XPS), respectively. The crystallinity, the surface morphology, and the cathodoluminescence (CL) of phosphors highly depended on theLidoping. The relationship between the crystalline and morphological structures and the luminescent properties was studied, andLi+doping affected not only the crystallinity but also the luminescent brightness ofY2O3:Eu3+phosphors. In particular, the incorporation of theLi+ion into theY2O3lattice could induce remarkable increase in the CL intensity. The enhanced photoluminescence brightness withLidoping may result both from the improved crystallinity leading to higher oscillating strengths for the optical transitions, and the increased surface area due to the larger particle sizes. The strongest emission intensity was observed withLidopedY2O3:Eu3+ceramics whose brightness was increased by a factor of 1.8 in comparison with that ofY2O3:Eu3+ceramics.

Keywords: Y2O3:Eu3+; cathodoluminescence; photoluminescence (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1142/S0218625X07009797

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