Plant growth LEDs have attracted broad attention in modern society, desperate for specific phosphors with a characteristic emission band. A novel Mn and Dy co-doped YAlGaO phosphor were successfully prepared through a conventional high-temperature solid-state reaction. A three band emission including red (625-700 nm), orange (550-607 nm) and blue (462-490 nm) is observed in these phosphors when excited under a near-UV lamp, which is ascribed to E → A of Mn, F → H and F → H of Dy, respectively. The three emissions match the absorption spectra of chlorophyll A and chlorophyll B well. Meanwhile, the energy transfer from Dy to Mn was confirmed by the luminescence spectra and lifetime analysis. Finally, an LED device was fabricated that consisted of a 365 nm ultraviolet chip and the YAlGaO:Mn,Dy phosphor. The excellent properties indicate that the synthesized phosphor has a promising application in the optical agricultural industry.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9062063 | PMC |
| http://dx.doi.org/10.1039/c9ra00700h | DOI Listing |
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