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Title: Broadband sensitization of downconversion phosphor YPO{sub 4} by optimizing TiO{sub 2} substitution in host lattice co-doped with Pr{sup 3+}-Yb{sup 3+} ion-couple

This study demonstrates a feasible and efficient route to alleviate the absorption problem of the terrestrial solar spectrum and enhance broadband luminescence from a promising down conversion powder phosphor YPO{sub 4} co-doped with Pr{sup 3+}-Yb{sup 3+} lanthanide ion-couple: incorporating a third sensitizing transition metal ion, e.g., Ti{sup 4+}. The x-ray powder diffraction results confirm the lattice substitution by the solid-state reaction doping rather than the formation of any secondary phase. The emission spectral results and the luminescence decay curve analysis show that the downconversion luminescence can be enhanced by 200%–300% and the quantum efficiency enhanced by more than 20% at the wavelength of around 980 nm, the best response spectrum for Si-based solar cells, by optimizing TiO{sub 2} doping concentration at 7 mol. %.
Authors:
 [1] ;  [2] ;  [3] ; ;  [1] ;  [4] ;  [5]
  1. College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124 (China)
  2. (China)
  3. College of Applied Sciences, Beijing University of Technology, Beijing 100124 (China)
  4. Department of Physics and Institute for Nanophysics and Rare-earth Luminescence, Xiangtan University, Xiangtan 411105 (China)
  5. X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
Publication Date:
OSTI Identifier:
22271147
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CONCENTRATION RATIO; DOPED MATERIALS; EMISSION SPECTRA; LUMINESCENCE; POWDERS; PRASEODYMIUM IONS; QUANTUM EFFICIENCY; SOLAR CELLS; TITANIUM IONS; TITANIUM OXIDES; X-RAY DIFFRACTION; YTTERBIUM IONS; YTTRIUM PHOSPHATES