Effect of the replacement of Zn2+ with Mg2+ in Ca14Zn6Ga10O35:Mn4+

To obtain applicable red phosphor for plant lighting, a series of Ca14Zn6-xMgxGa9.86O35:0.14Mn(4+) phosphors were synthesized by a conventional high-temperature solid-state method. The XRD, SEM, excitation and emission spectra, temperature-dependent emission spectra, decay time, internal quantum efficiency, luminous efficiency and CIE coordinates are investigated with the change of the doping concentration of Mg2+. The experiment results suggest that the luminescence properties and quantum efficiency of the phosphor can by improved by replacing Zn2+ with Mg2+ at appropriate doses, while the thermal resistance performance and decay time declined, and the internal quantum efficiency and luminous efficiency reached its maximum, when the Mg2+ concentration is 0.40. Moreover, the CIE coordinates move to a deeper red light direction as the doping increased. Ultimately, the appropriate doping concentration of Mg2+ was determined at x = 0.40, in which case, the phosphor has a promising application in future plant lighting. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.