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Optical thermometry based on trivalent rare earth doped materials has attracted much attention recently. This article reported the temperature dependent near infrared luminescence of Ho3+ doped in CaWO4 phosphors. A series of CaWO4:Ho3+ powders have been synthesized by high temperature solid state reaction. The XRD patterns showed that the Ho3+ ions have occupied the lattice sites of Ca2+ ions in...
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