Ce3+ doped BaLu2Al4SiO12: A promising green-emitting phosphor for white LEDs

BaLu1.94Al4SiO12:0.06Ce3+ (BLASO:0.06Ce3+) green-emitting phosphor could be easily obtained by a conventional solid-state reaction method at 1400 °C. BLASO:0.06Ce3+ possesses the garnet structure (Ia3̅d space group) with the lattice parameter a = 11.9222(0) Å. The emission peak of BLASO:0.06Ce3+ is...

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Bibliographic Details
Published in:Journal of luminescence 2018-11, Vol.203, p.609-615
Main Authors: Qiang, Yaochun, Pan, Zhifang, Ye, Xinyu, Liang, Mingzhang, Xu, Jianfei, Huang, Jianhui, You, Weixiong, Yuan, Huali
Format: Article
Language:English
Subjects:
BaLu1.94Al4SiO12:0.06Ce3
Phosphors
Thermal quenching
White LEDs
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Summary:BaLu1.94Al4SiO12:0.06Ce3+ (BLASO:0.06Ce3+) green-emitting phosphor could be easily obtained by a conventional solid-state reaction method at 1400 °C. BLASO:0.06Ce3+ possesses the garnet structure (Ia3̅d space group) with the lattice parameter a = 11.9222(0) Å. The emission peak of BLASO:0.06Ce3+ is located at 513 nm and its photoluminescent quantum yield is determined to be 92.4% at 25 °C when excited at 450 nm. BLASO:0.06Ce3+ presents excellent thermal properties, with the photoluminescence intensity at 200 °C only decreased to 91.5% of its room temperature value. A phosphor-converted white LED device fabricated by using BLASO:0.06Ce3+ as the green phosphor exhibits good optical performance with Ra = 88.5, CCT = 3562 K and CIE1931 chromaticity coordinates as (x = 0.4041, y = 0.3951). The results indicate that BLASO:0.06Ce3+ phosphor has strong potential applications in developing high color rendering, thermally stable, warm-white LEDs.
ISSN:0022-2313
1872-7883
DOI:10.1016/j.jlumin.2018.07.002