Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 47, 2013
Previous Article Next Article

Band structure, shape controllable synthesis and luminescence properties of the precursor and final product Lu6O5F8:Eu/Tb/Ce/Dy nano/microstructures

Author affiliations

Abstract

In the present paper, the band structure and density of states of Lu6O5F8 were primarily studied with the help of first-principles calculations, and the indirect band gap of Lu6O5F8 is estimated to be 4.13 eV wide. Lu(OH)1.57F1.43/NH4Lu2F7/Lu6O5F8 nano/microcrystals with diverse morphologies, sizes and dimensions have been synthesized via a mild and controllable hydrothermal process using citric acid trisodium salt dehydrate (Cit3−), hexadecyltrimethylammonium bromide (CTAB), ethylenediaminetetraacetic acid (EDTA), ethylenediaminetetraacetic acid disodium salt (EDTA2−), sodium dodecyl benzene sulfonate (SDBS), ethylenediamine (EA) or polyvinylpyrrolidone (PVP), etc. as an additive, respectively. The phases, morphologies, sizes, and luminescence properties of the as-prepared samples were well characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), photoluminescence (PL) and cathodoluminescence (CL) spectroscopy, respectively. The results indicate that the phase, morphology, and size of Lu(OH)1.57F1.43/Lu6O5F8 can be tuned in a controlled manner by altering the amount or kinds of additives, the pH values of the initial solution, and the reaction time. Furthermore, the time-dependent morphology evolution shows that the resulting microrods, hexagonal prisms, flower clusters and spheres were synthesized by a dissolution–reconstruction formation mechanism. It is expected that the synthetic strategy can be extended to controllable synthesis of other types of nano/microcrystals as well. Upon ultraviolet (UV), vacuum ultraviolet (VUV) and electron beam excitation, the luminescence properties as well as the emission mechanisms of the Ln3+ (Ln = Eu/Tb/Ce/Dy) single doped precursor (NH4Lu2F7, Lu(OH)1.57F1.43) and final product (Lu6O5F8) are all compared and studied. All in all, the multifunctional Ln3+ doped NH4Lu2F7/Lu(OH)1.57F1.43/Lu6O5F8 nano/microcrystals have potential applications in photoluminescence areas and field emission display devices.

Graphical abstract: Band structure, shape controllable synthesis and luminescence properties of the precursor and final product Lu6O5F8:Eu/Tb/Ce/Dy nano/microstructures

Back to tab navigation

Supplementary files

Publication details

The article was received on 17 Sep 2013, accepted on 16 Oct 2013 and first published on 17 Oct 2013


Article type: Paper
DOI: 10.1039/C3TC31838A
Citation: J. Mater. Chem. C, 2013,1, 7952-7962

  •   Request permissions

    Band structure, shape controllable synthesis and luminescence properties of the precursor and final product Lu6O5F8:Eu/Tb/Ce/Dy nano/microstructures

    L. Guo, Y. Wang, L. Han, Q. Qiang, W. Zeng, Z. Zou, B. Wang and X. Guo, J. Mater. Chem. C, 2013, 1, 7952
    DOI: 10.1039/C3TC31838A

Search articles by author

Spotlight

Advertisements