skip to main content

SciTech ConnectSciTech Connect

Title: Influence of yttrium content on the location of rare earth ions in LYSO:Ce crystals

Single-crystal X-ray diffraction (SCD), X-ray fluorescence (XRF), inductively coupled plasma optical emission spectroscopy (ICP-OES) and X-ray excited luminescence (XEL) measurements were performed to investigate structure details and segregation coefficients of (Lu{sub 1−x}Y{sub x}){sub 2}SiO{sub 5}:Ce (x=0 at%, 8.7 at%, 25.7 at%, 44.7 at%, 65.7 at%, 87.9 at% and 100 at%). Y{sup 3+} cations were found to have a preferential occupation for RE1 site (7-oxygen-coordinated) over RE2 site (6-oxygen-coordinated), which results in a greater increase of cell parameter c than that of a with increase in Y content due to LYSO's microstructure characteristics. Results presented here revealed that the less the difference in electronegativity and effective ionic radius between the two ions, the easier substitution of one ion by the other, and hence the higher segregation coefficients. Besides, the contribution of luminescence of Ce1 and Ce2 in the whole XEL was evaluated, and the location of Ce{sup 3+} ion was discussed. - Graphical abstract: Segregation coefficients of (Lu{sub 1−x}Y{sub x}){sub 2}SiO{sub 5}:Cce:italic> at RT/ce:italic>. Display Omitted.
Authors:
 [1] ;  [2] ;  [3] ; ; ;  [1] ;  [2]
  1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, No. 1295 Dingxi Road, Shanghai 200050 (China)
  2. (China)
  3. Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433 (China)
Publication Date:
OSTI Identifier:
22274175
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 209; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CATIONS; CERIUM; CERIUM IONS; CRYSTAL STRUCTURE; DOPED MATERIALS; ELECTRONEGATIVITY; EMISSION SPECTROSCOPY; FLUORESCENCE; LUTETIUM; MICROSTRUCTURE; MONOCRYSTALS; OXYGEN; PLASMA; SEGREGATION; X RADIATION; X-RAY DIFFRACTION; X-RAY FLUORESCENCE ANALYSIS; YTTRIUM; YTTRIUM IONS