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Issue 12, 2017
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Structural characterization and photoluminescence in the rare earth-free oxy-fluoride anti-perovskites Sr3−xBi2x/3AlO4F and Sr3−xBi2x/3GaO4F

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Abstract

The activator Bi3+ has been successfully incorporated into the anti-perovskite oxy-fluoride host lattice Sr3MO4F (M = Al, Ga) to form rare earth-free phosphors of the composition Sr3−xBi2x/3AlO4F, 0 ≤ x ≤ 0.1, and Sr3−xBi2x/3GaO4F, 0 ≤ x ≤ 0.048. These phases absorb in the UV region (λex = 240–326 nm) and exhibit broad emission in the blue region of the visible spectrum (λem = 446.5–455 nm). The optimum compositions for maximum photoluminescent intensity were determined to be Sr2.976Bi0.016AlO4F and Sr2.976Bi0.016GaO4F before concentration quenching occurs. Full structural characterization based upon PXRD and NPD data were performed with DFT calculations suggesting that Bi3+ ions are preferentially incorporated on the ten coordinate Sr(1) site.

Graphical abstract: Structural characterization and photoluminescence in the rare earth-free oxy-fluoride anti-perovskites Sr3−xBi2x/3AlO4F and Sr3−xBi2x/3GaO4F

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Publication details

The article was received on 26 Jan 2017, accepted on 01 Mar 2017, published on 01 Mar 2017 and first published online on 01 Mar 2017


Article type: Paper
DOI: 10.1039/C7DT00310B
Citation: Dalton Trans., 2017,46, 4055-4065
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    Structural characterization and photoluminescence in the rare earth-free oxy-fluoride anti-perovskites Sr3−xBi2x/3AlO4F and Sr3−xBi2x/3GaO4F

    C. D. Quilty, M. Avdeev, J. D. Driskell and E. Sullivan, Dalton Trans., 2017, 46, 4055
    DOI: 10.1039/C7DT00310B

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