TỔNG HỢP VẬT LIỆU NANO PHÁT QUANG YVO4:Eu3+ VÀ YVO4:Er3+ BẰNG PHƯƠNG PHÁP PHẢN ỨNG NỔ

Abstract

YVO₄:Eu³⁺ and YVO₄:Er³⁺ nanophosphors were prepared via combustion synthesis using urea as fuel and metal nitrates as precursor. Characterization of prepared materials was investigated by thermogravimetric and differential thermal analysis, infrared spectra, X-ray diffraction, scanning electron microscopy and photoluminescent spectra. The photoluminescent spectra of YVO₄:Eu³⁺ are described by the well-known ⁵D₀-⁷F_J transition (J = 1, 2, 3, 4) of Eu³⁺ ions with the strongest emission in the red region for J = 2. YVO₄:Er³⁺ shows green emission coresponding to the ²H_11/2 - ⁴I_15/2 and ⁴S_11/2 - ⁴I_15/2 transitions of Er³⁺ ion. The effects of synthesis conditions on structure and optical properties have been investigated.