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Issue 12, 2017
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Insight into the preparation and luminescence properties of yellow-green-emitting [(Sr,Ba)3AlO4F–Sr3SiO5]:Ce3+ solid solution phosphors

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Abstract

A design principle for the chemical unit cosubstitution of [Al3+–F] for [Si4+–O2−] has been adopted to establish the phase relations between isostructural (Sr,Ba)3SiO5 and (Sr,Ba)3AlO4F, and solid solutions of (1 − x)Sr3SiO5x(Sr,Ba)3AlO4F:Ce3+ with tunable luminescence properties have been prepared based on the comparative “one-step” and “two-step” methods. The structures and photoluminescence tuning of the (1 − x)Sr3SiO5x(Sr,Ba)3AlO4F:Ce3+ phosphors were investigated, and it was found that enhanced emission intensities could be obtained using the two-step method with high crystalline quality. The emission peaks of the (1 − x)Sr3SiO5x(Sr,Ba)3AlO4F:Ce3+ phosphors were blue-shifted from 520 to 490 nm upon increasing the content from x = 0 to x = 1.0, and the corresponding mechanism has been discussed. The results of the temperature-dependent luminescence properties further verified that the formation of a solid solution can improve the thermal stability of the photoluminescence. White light-emitting diode (w-LED) lamps were fabricated based on the as-prepared bluish-yellow emitting phosphors, and commercial red phosphors, combined with 415 nm NUV-emitting InGaN chips. The best packaged w-LED lamp gave CIE chromaticity coordinates of (0.38, 0.42) with a warm color temperature of 4277 K and a color rendering index of 86.3.

Graphical abstract: Insight into the preparation and luminescence properties of yellow-green-emitting [(Sr,Ba)3AlO4F–Sr3SiO5]:Ce3+ solid solution phosphors

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Publication details

The article was received on 09 Feb 2017, accepted on 02 Mar 2017 and first published on 02 Mar 2017


Article type: Paper
DOI: 10.1039/C7TC00630F
Citation: J. Mater. Chem. C, 2017,5, 3176-3182
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    Insight into the preparation and luminescence properties of yellow-green-emitting [(Sr,Ba)3AlO4F–Sr3SiO5]:Ce3+ solid solution phosphors

    Z. Yu, Z. Xia, M. Chen, Q. Xiang and Q. Liu, J. Mater. Chem. C, 2017, 5, 3176
    DOI: 10.1039/C7TC00630F

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