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Highly efficient and thermally robust cyan-green phosphor-in-glass films for high-brightness laser lighting
H. Wu; G.-H. Pan; Z. Hao; L. Zhang; H. Wu and J. Zhang
2021
Source PublicationJournal of Materials Chemistry C
ISSN20507534
Volume9Issue:36Pages:12342-12352
AbstractLaser-driven white lighting has drawn great attention due to its high-brightness, high efficiency and compact size. However, the current laser lighting usually suffers from a low color rendering (Ra 60) due to the presence of a wide "Cyan cavity" (460-530 nm) in the luminescence spectrum. Herein, we report on the preparation and characterization of a novel cyan-green color converter, namely Ca3Sc2Si3O12:Ce3+,Na+phosphor-in-glass (CSS-PiG) film. The addition of Na+as a charge compensator greatly improved the internal quantum efficiency (IQE) of CSS:Ce3+phosphors. Because of the good chemical stability and the matching refractive index between the glass matrix and embedded phosphors, the as-prepared CSS-PiG film exhibits an efficient cyan-green emission (with a peak at 508 nm and IQE 91%) and excellent thermal stability (maintaining 75% of the room-temperature emission intensity at 300 C). Under the excitation of a 14.5 W mm2blue laser, the PiG film could produce a high-brightness white light with a forward luminous flux of 701 lm, a forward luminous efficacy of 112 lm W1and aRaof 61. By coating a red-emitting CaAlSiN3:Eu2+layer on the CSS-PiG film, the composite CSS-PiG/CaAlSiN3film shows an ultra-broadband emission with a full-width at half maximum (FWHM) of 196 nm, which remarkably narrows the "Cyan cavity" and thus provides aRaabove 90. These results demonstrate that the CSS-PiG film is a promising candidate for laser lighting. The Royal Society of Chemistry 2021.
DOI10.1039/d1tc02551a
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Indexed BySCI ; EI
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Document Type期刊论文
Identifierhttp://ir.ciomp.ac.cn/handle/181722/65291
Collection中国科学院长春光学精密机械与物理研究所
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GB/T 7714
H. Wu,G.-H. Pan,Z. Hao,et al. Highly efficient and thermally robust cyan-green phosphor-in-glass films for high-brightness laser lighting[J]. Journal of Materials Chemistry C,2021,9(36):12342-12352.
APA H. Wu,G.-H. Pan,Z. Hao,L. Zhang,&H. Wu and J. Zhang.(2021).Highly efficient and thermally robust cyan-green phosphor-in-glass films for high-brightness laser lighting.Journal of Materials Chemistry C,9(36),12342-12352.
MLA H. Wu,et al."Highly efficient and thermally robust cyan-green phosphor-in-glass films for high-brightness laser lighting".Journal of Materials Chemistry C 9.36(2021):12342-12352.
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