A series of different concentrations of LaPO4:Eu3+ phosphors with the morphology of nanowires were successfully prepared by a precipitation method. It was observed that the integrated intensity of D-5(0) --> F-7(2) transition of Eu3+ was higher than its D-5(0) --> F-7(1) transition when the sintering temperature was at 600 degrees C. The most interesting phenomenon was that the doping concentrations of LaPO4:Eu3+ nanowires were changed in a large range (5-15%), the photoluminescence intensities were maintained in a certain value. This phenomenon was not observed in the bulk LaPO4:Eu3+ phosphors. A detailed explanation to this phenomenon was given. (C) 2014 Elsevier B.V. All rights reserved.