Abstract
Abstract In this work, a strategy of K+ ions doping was visited with the aim of enhancing up-conversion luminescence (UCL) and sensitivity for optical thermometer of β-PbF2:Er3+ glass ceramics (GCs). Compared to K+-free β-PbF2:Er3+ GCs, the UCL intensity of green (521, 552 nm), red (668 nm), NIR (825 nm) emissions and absolute sensitivity (Sa) for optical thermometer of the β-PbF2:Er3+ GCs co-doped with 10 mol% K+ ions were increased by 176, 82, 18 and 1.5 times, respectively. Charge compensation and the distortion of the local symmetry around the Er3+ ions, when the K+ ions were introduced, were confirmed to be the origin of the enhancement. The results show that K+ ions simultaneous co-doping of β-PbF2:Er3+ glass ceramics (GCs) very effective way to integrate this material for advanced photonic applications.
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