LUMINESCENCE PROPERTIES OFLiKGdF5CRYSTALS DOPED WITHEr3+ANDTm3+AS PROMISING MATERIALS FOR VUV-EXCITED PHOSPHORS

V. N. Makhov (), N. M. Khaidukov, M. Kirm, G. Zimmerer, S. K. Lam, D. Lo and N. V. Suetin
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V. N. Makhov: Lebedev Physical Institute, Moscow 119991, Russia
N. M. Khaidukov: Kurnakov Institute of General and Inorganic Chemistry, Moscow 117907, Russia
M. Kirm: II. Institut fur Experimentalphysik der Universitat Hamburg, Hamburg 22761, Germany
G. Zimmerer: II. Institut fur Experimentalphysik der Universitat Hamburg, Hamburg 22761, Germany
S. K. Lam: Physics Department, Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, China
D. Lo: Physics Department, Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, China
N. V. Suetin: Nuclear Physics Institute, Moscow State University, Moscow 119899, Russia

Surface Review and Letters (SRL), 2002, vol. 09, issue 01, 271-276

Abstract: The spectroscopic properties ofLiKGdF5crystals doped withEr3+orTm3+and codoped withDy3+,Tb3+orSm3+, and ofLiKYF5crystals doped withEr3+orTm3+and codoped withDy3+have been studied under excitation by vacuum ultraviolet (VUV) radiation. It has been found that inLiKGdF5crystals doped withEr3+orTm3+the VUV energy absorbed by4f–5dtransitions in theEr3+or theTm3+ion is nearly completely converted into the UV/visible emission. At least in theLiKGdF5:Er3+crystal some part of such a conversion is due to the energy transfer from the5dstate of theEr3+ion to the neighboringGd3+ion as a result of cross-relaxation giving rise to the emission of two UV/visible photons instead of one VUV quantum.LiKGdF5crystals doped withEr3+and codoped withDy3+,Tb3+orSm3+can be considered as promising materials for phosphors excited by VUV radiation from noble gas discharge.

Keywords: 78.60; 78.55; 78.40; 78.47; 71.20E (search for similar items in EconPapers)
Date: 2002
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DOI: 10.1142/S0218625X0200218X

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