Journal
DALTON TRANSACTIONS
Volume 47, Issue 43, Pages 15574-15582Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8dt03740j
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Funding
- National Natural Science Foundation of China [51572232, 51561135015]
- Agriculture Five Innovations Project of the Development and Reform Commission of Fujian Province [K6015004]
- Natural Science Foundation of Fujian Province [2018J01588, 2018J01080]
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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 Ca13.6Sr0.4Zn6Ga9.85O35:0.15Mn(4+) (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 (similar to 75.8%), excellent thermal stability (similar to 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.
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