Effects of Crystal Structure on Up-conversion Luminescence in Er3+/Yb3+ Co-doped SrTa4O11

The effects of the host crystal structure of an SrTa4O11:Er3+/Yb3+ up-conversion (UC) phosphor on its luminescence properties were investigated using the tetragonal tungsten bronze (TTB) and hexagonal polymorphs of the SrTa4O11 host. Hexagonal SrTa4O11:Er3+/Yb3+ showed bright luminescence, whereas the UC emission intensity of TTB SrTa4O11:Er3+/Yb3+ was very weak, corresponding to ≈1% that of the hexagonal phase. This result was attributed to the local crystal structure around the rare-earth ions in the host lattice.

[1]  Bin Liu,et al.  Enhanced up/down-conversion luminescence and heat: Simultaneously achieving in one single core-shell structure for multimodal imaging guided therapy. , 2016, Biomaterials.

[2]  M. Kakihana,et al.  Screening of Er3+/Yb3+ Codoped RE–Ta–O and RE–Nb–O (RE = Y, La, or Gd) Upconversion Phosphors , 2016 .

[3]  Jeevan Meruga,et al.  Red-green-blue printing using luminescence-upconversion inks , 2014 .

[4]  Artur Bednarkiewicz,et al.  Lanthanide-doped up-converting nanoparticles: Merits and challenges , 2012 .

[5]  Zhengwei Pan,et al.  Lanthanide-doped GdVO4 upconversion nanophosphors with tunable emissions and their applications for biomedical imaging , 2012 .

[6]  M. Kakihana.  Synthesis of high-performance ceramics based on polymerizable complex method , 2009 .

[7]  M. Green,et al.  Luminescent layers for enhanced silicon solar cell performance: Up-conversion , 2006 .

[8]  A. Speghini,et al.  Effect of Yb3+ Codoping on the Upconversion Emission in Nanocrystalline Y2O3:Er3+ , 2003 .

[9]  R. Gruehn,et al.  Dimorphie von SrTa4O11 ‐ ein Schritt von der tetragonalen Bronzestruktur zur Struktur von CaTa4O11 , 1983 .

[10]  G. S. Ofelt.  Intensities of Crystal Spectra of Rare‐Earth Ions , 1962 .

[11]  M. Kakihana,et al.  Parallel Synthetic Exploration of Tm3+-Doped Alkaline-Earth Gallate Phosphors by use of Polymerizable Complex Method , 2007 .

[12]  F. Auzel.  Upconversion and anti-Stokes processes with f and d ions in solids. , 2004, Chemical reviews.