Strain-Induced Enhancement of Eu^sup 3+^ Emission in Red Phosphor NaMgPO^sub 4^:Eu^sup 3+^, Al^sup 3

(ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image) A series of (NaMgPO4)0.98-x: ..., ... phosphors were prepared by the solid-state method. X-ray powder diffraction results confirm that the samples contain mixture phases of crystals. The doped effect of Al3+ on the photoluminescence properties of (NaMgPO4)0.98-x: ..., ... phosphors is discussed. The results indicate that two dependent curves of emission relative intensity and strain on Al3+ doping concentration are all Gaussian curves, and a high correlation is observed between emission relative intensity of Eu3+ and strain caused by Al3+. In other words, emission relative intensity of Eu3+ is enhanced with the increase of the strain. The enhanced mechanism of the strain is discussed. In addition, (NaMgPO4)0.98-x: ..., ... phosphors are electric dipole-dominated transition red phosphors. The optimal molar concentration of Al3+ for the samples is 9%, which (NaMgPO4)0.89: ..., ... is a potential candidate as the red-emitting phosphor for ultraviolet-based white light-emitting diodes.