Fabrication of One―dimensional LaPO4 : Eu3+ Micro―nanofibers by Electrospinning

Eu3+―doped LaPO4 micro―nanofiberswere prepared by the electro spinning technology. Scanning electron microscope(SEM), X―ray diffraction (XRD), the mogravimetry―differential thermal analysis(TG―DTA), and photoluminescencespectra (PL) were used to characterize the obtained samples. XRD patterns indicate that theas―prepared micro―nanofibers are crystallized well at 800 and assign edto JCPDS―35―0731 of the monoclinic LaPO4 crystal. Upon excitation into the Eu3+ at 409 nm, the emission spectrum of LaPO4:Eu3+ micro―nanofibers is composed of 5 D0― 7 F J (J = 1, 2, 3, 4) emission lines of Eu3+, with the transition 5 D0 ― 7 F2 (at 618 nm) being the most prominent group, which is characterized by red emission. The optimum doping concentration of Eu3+ is 5mol% in the LaPO4: Eu3+ micro―nanofibers. The luminescence decay curve of LaPO4: Eu3+ micro―nano fibers shows single exponential behavior, and the lifetime(|ó) of Eu3+ is about 3.7 ms.