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 μ1% that of the hexagonal phase. This result was attributed to the local crystal structure around the rare-earth ions in the host lattice.
|Number of pages||3|
|Publication status||Published - 2018|
- Crystal structure
- Up-conversion phosphor
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