Co‐precipitation synthesis and luminescence properties of K2TiF6:Mn4+ red phosphors for warm white light‐emitting diodes

K₂TiF₆:Mn⁴⁺ red phosphors with different Mn⁴⁺ doping concentrations were obtained using the co‐precipitation method. X‐Ray diffraction, scanning electron microscopy, Raman spectra, Fourier transform infrared spectroscopy, photoluminescence excitation and emission spectra and decay curves were used to characterize the properties of K₂TiF₆:Mn⁴⁺ phosphors. Under excitation at 470 nm, an intense red emission peak around 631 nm corresponding to the ²E_g–⁴A₂ transition of Mn⁴⁺ was observed for 2.48 mol% K₂TiF₆:Mn⁴⁺ phosphors and was used as the optimum doping concentration. The excellent luminescent properties of K₂TiF₆:Mn⁴⁺ suggest that this material might be a promising red phosphor for generating warm white light in phosphor‐converted white light‐emitting diodes. Copyright © 2015 John Wiley & Sons, Ltd.