The contribution of Eu doping concentration on the modulation of morphology and luminescence properties of InVO:Eu.

Nanostructures of InVO and InVO:Eu were synthesized through a hydrothermal method with a post annealing process. The morphology and luminescence properties of InVO:Eu can be modulated by Eu ion doping concentration. SEM and (HR)TEM studies indicated that different sizes of nanoparticles were obtained when the Eu ion concentration ranged from 2 mol% to 30 mol%, and middle-concave nanodisks or nanoparticles with different sizes were obtained with the Eu ion concentration ranging from 35 mol% to 45 mol%. Luminescence property studies indicated that the photoluminescence emission originated both from VO and Eu, and the emission of VO was blue shifted, affected by the doped Eu ions. The CIE chromaticity diagram of Eu-doped indium vanadate exhibited green, blue-green, red, giving especially white light emission.