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A far-red emission (Ca,Sr)14Zn6Ga10O35:Mn4+ phosphor for potential application in plant-growth LEDs

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Abstract

To facilitate phosphor-converted light-emitting diodes (LEDs) for plant growth, the development of phosphor materials with efficient red or far-red emission is essential. Herein, we report a novel Ca13.6Sr0.4Zn6Ga9.85O35:0.15Mn4+ (CSZG:Mn4+) phosphor with far-red emission synthesized via the traditional solid-state reaction. The structure, morphology and the effect of dopant concentration on the photoluminescence properties of CSZG:Mn4+ were systematically investigated. These phosphors can efficiently be excited by near-ultraviolet (NUV)/blue LED chips, and exhibit highly efficient red emission in the range of 650–760 nm, which matches well with the absorption band of phytochrome. The as-fabricated LED, comprising the CSZG:Mn4+ phosphor and a 460 nm blue InGaN chip, emits bright blue and red light. Owing to their high quantum efficiency (QE) value (∼75.8%), excellent thermal stability (∼97.9% at 425 K relative to that at RT), non-rare earth materials and mild preparation conditions, the CSZG:Mn4+ phosphors have great potential as far-red emission phosphors in high-power plant growth LEDs.

Graphical abstract: A far-red emission (Ca,Sr)14Zn6Ga10O35:Mn4+ phosphor for potential application in plant-growth LEDs

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Publication details

The article was received on 16 Sep 2018, accepted on 09 Oct 2018 and first published on 10 Oct 2018


Article type: Paper
DOI: 10.1039/C8DT03740J
Citation: Dalton Trans., 2018, Advance Article
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    A far-red emission (Ca,Sr)14Zn6Ga10O35:Mn4+ phosphor for potential application in plant-growth LEDs

    Y. Wu, Y. Lv, K. Ruan and Z. Xie, Dalton Trans., 2018, Advance Article , DOI: 10.1039/C8DT03740J

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