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Issue 32, 2017
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Dy3+@Mn4+ co-doped Ca14Ga10−mAlmZn6O35 far-red emitting phosphors with high brightness and improved luminescence and energy transfer properties for plant growth LED lights

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Abstract

A novel substrate of Ca14Ga10−mAlmZn6O35 (CGAZO) was successfully synthesized via a high-temperature solid-state reaction method and co-doped with Dy3+ and Mn4+ to form a new deep red phosphor (CGAZO:Dy3+,Mn4+) for plant growth LED lighting. This extraordinary phosphor can exhibit strong far-red emission with a maximum peak at 715 nm between 650 and 750 nm, and other four shoulder peaks at 680, 689, 698 and 706 nm, which can be ascribed to 2Eg → 2Ag spin-forbidden transition of Mn4+. X-ray diffraction (XRD) patterns clarified that Ga3+ sites in the host were partly replaced by Al3+ ions. Moreover, an effective energy transfer from Dy3+ to Mn4+ in the CGAZO host had been verified since linear reduction of emission intensities and decay times of the Dy3+ emission of the phosphors CGAZO:Dy3+,Mn4+ with increasing concentration of Mn4+ was observed. Finally, a LED device was fabricated using a 460 nm blue-chip, silicon gel, and the as-obtained far-red emitting CGAZO:Dy3+,Mn4+ phosphors. The results of the tobacco plant cultivation lighting by this LED device indicate that the as-prepared phosphor has a potential application in the agricultural industry.

Graphical abstract: Dy3+@Mn4+ co-doped Ca14Ga10−mAlmZn6O35 far-red emitting phosphors with high brightness and improved luminescence and energy transfer properties for plant growth LED lights

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Publication details

The article was received on 19 Apr 2017, accepted on 15 Jul 2017 and first published on 17 Jul 2017


Article type: Paper
DOI: 10.1039/C7TC01716B
Citation: J. Mater. Chem. C, 2017,5, 8201-8210
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    Dy3+@Mn4+ co-doped Ca14Ga10−mAlmZn6O35 far-red emitting phosphors with high brightness and improved luminescence and energy transfer properties for plant growth LED lights

    Z. Zhou, M. Xia, Y. Zhong, S. Gai, S. Huang, Y. Tian, X. Lu and N. Zhou, J. Mater. Chem. C, 2017, 5, 8201
    DOI: 10.1039/C7TC01716B

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