Synthesis and Investigation of La,Ca ‐Doped EuVO₄ Nanoparticles with Enhanced Excitation by Near Violet Light

Abstract

The paper reports experimental results on features of crystal structure and luminescent properties of the Eu1−xCayVO4 nanoparticles synthesized for the first time. The Eu1−xCaxVO4 compounds with x = 0, 0.05, 0.1, 0.15, and 0.20 are prepared by aqueous nitrate–citrate sol–gel synthesis. The obtained samples are characterized by XRD analysis. The Eu1−xCaxVO4 samples are crystallized in tetragonal structure. Phase composition of the sample depends on the x value. Increasing concentrations of the calcium ions leads to formation of the EuVO4 and CaV2O6 phases’ mixture. Luminescence properties of the synthesized Eu1−xCaxVO4 nanoparticles are considered in comparison with properties of the La1−x−yEuyCaxVO4 nanoparticles. Formation of two types of emission centers and arising of additional excitation band near 400 nm are observed for the both compositions. It is shown that second types of the emission centers have different structure and spectral characteristics for the Eu1−xCaxVO4 and La1−x−yEuyCaxVO4 nanoparticles, whereas the 400 nm excitation band has the same origin for the both compositions.

Pulsed laser deposition of the LaVO4:Eu, Ca nanoparticles on glass and silicon substrates

“…A wide range of possible applications of vanadate nanoparticles have attracted significant research efforts to development of new vanadate compositions with improved characteristics depending on requirements of various practical tasks (Zhu et al, 2018;Chornii et al, 2016;Biswas et al, 2017;Venkatesan et al, 2018;. Studying the Eu 3+ -activated LaVO 4 vanadate nanoparticles, we have achieved increase of emission intensity in 10 times using various synthesis conditions (Chukova et al, 2013(Chukova et al, , 2015(Chukova et al, , 2018. The best intensity characteristics were achieved for the La 1-x Eu x VO 4 nanoparticles synthesized by sol-gel method.…”