INVESTIGATING THE EFFECTS OF CERIUM DOPING ON THE CHEMICAL AND OPTICAL PROPERTIES OF LANTHANUM PHOSPHATE NANOPARTICLES

Abstract

Synthesis of cerium doped lanthanum phosphate nanoparticles is described here by simple co-precipitation technique. The phase, morphology and composition 2.0 mol% Ce and 6.0 mol% Ce doped lanthanum phosphate were analyzed by Fourier transform infrared spectroscopy (FTIR) and UV-visible spectroscopy. Fourier transform infrared spectroscopy (FTIR) confirms the water vibration modes at a specific wave number along with a phosphate group and variation in wave numbers when cerium is incorporated in to lanthanum phosphate. Infrared spectral data presented for the produced sample were recorded on a Fourier transform spectrometer with the scan range of 650-4000 cm⁻¹. For the excitation and monitor photoluminescence (PL), the spectra as well as the PL were also obtained. Luminescent Co₃⁺ doped LaPO₄ when synthesized at 2.0 and 6.0 mole % was seen to exhibit PL emission. UV spectroscopic analyses show that the present absorption bands are located in the ultraviolet region and noticeably depend on the presence of dopant ions. The created samples can be sued in various lighting and display application devices.