Abstract
A color tunable emission was obtained in CaHfO3:Ce3+,Tb3+ phosphor. XRD, luminescence spectra, decay curves, temperature-dependent emission spectra and quantum efficiency were used to characterize the structure and luminescence properties. Under 330 nm excitation, the Ce3+ singly doped CaHfO3 samples exhibited intense blue emission. The emission intensity reached the maximum at 1 mol% Ce3+. CaHfO3:0.1Ce3+ samples possessed high quantum efficiency of 52.05%. In Tb3+ co-doped CaHfO3:Ce3+ phosphors, the emission position of Ce3+ blue shifts slightly due to weaker crystal field strength around Ce3+. Besides, the energy transfer between Ce3+ and Tb3+ leads to tunable emission colors from blue to cyan, then to green. The energy transfer efficiency and thermal stability are investigated in detail.
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Acknowledgements
Project is supported by National Natural Science Foundation of China (51702378 and 11704043) and Key Technologies R&D Program of Henan Province (No. 182102210604).
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Shi, Y., Cheng, P., Chen, J. et al. Color tunable emission via Ce3+–Tb3+ energy transfer in CaHfO3 phosphor. J Mater Sci: Mater Electron 30, 17798–17803 (2019). https://doi.org/10.1007/s10854-019-02131-0
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DOI: https://doi.org/10.1007/s10854-019-02131-0