Defect Assisted Efficient Energy Transfer from ZnO host lattice to Eu ion in ZnO porous nanostructures

In the present work, Eu doped ZnO porous nanostructures have synthesized using one step simple solution combustion method. Incorporation of Eu ion in ZnO nanostructures has been confirmed by XRD analysis. The photoluminescence spectra of pure ZnO nanostructures shows broad defect related emission in orange region. The orange emission is less commonly reported and it arises from optical transitions in the single negatively charged interstitial oxygen ion (Oi). Eu3+-doped ZnO nanostructures, which emit in the visible light region and are non-toxic, have great potential for applications in photonic devices, light-emitting diodes, and bio imaging.