Nanocrystalline lanthanide tetraphosphates: Energy transfer processes in samples co-doped with Pr 3+ /Yb 3+ and Tm 3+ /Yb 3+
Source abstract
Abstract
Abstract Photoluminescent properties of nanocrystalline powders of the LiLa(PO 3 ) 4 system co-doped with Pr 3+ /Yb 3+ or Tm 3+ /Yb 3+ ions were reported. The powders were synthesized by precipitation method and annealed at 450 °C. Two series of the samples were prepared with 1 mol% of praseodymium or thulium ions and with various ytterbium content (from 2% up to 16%). Both the up- and downconversion energy transfers were studied, in particular, the spectra and kinetics of photoluminescence under blue (into Pr 3+ or Tm 3+ ions, respectively) and NIR (into Yb 3+ ions) excitations. The possible mechanisms of energy migration were discussed. Higher ytterbium concentration resulted in higher energy transfer efficiencies for both tetraphosphate systems.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Glass properties and applications · Crystal Structures and Properties
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