Spectrochim Acta A Mol Biomol Spectrosc
November 2019
Tellurite glasses doped with trivalent Pr, Nd and Yb ions were prepared using conventional high-temperature melt-quenching technique and their optical absorption, near-infrared emission, X-ray diffraction (XRD), Raman spectrum, and differential scanning calorimeter (DSC) curve were measured. Upon excitation at 488 nm, an ultra-broadband near-infrared emission extending from 800 to 1120 nm was found to appear owing to the overlapping of the emission bands centered at 900 and 1035 nm of Pr, 880 and 1060 nm of Nd as well as 978 nm of Yb, respectively. The energy transfer mechanism among Pr, Nd and Yb ions which was responsible for the observed ultra-broadband near-infrared emission was investigated to understand the luminescent phenomena.
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