Controlled synthesis, optical and electronic properties of Eu3+ doped yttrium oxysulfide (Y2O2S) nanostructures

Single crystalline Eu3+ doped yttrium oxysulfide (Y2O2S) nanocrystals, nanosheets, nanobelts, nanotubes, nanorods and nanowires have been successfully prepared via precursors of Y(OH)3 nanostructures in high yields and purities by a convenient hydrothermal method under mild conditions. Comprehensive structural, morphological and spectroscopical studies have been carried out on the nanometre scale. The as-prepared samples are characterized using X-ray photoelectron spectra (XPS), to investigate the elementary states on the surfaces. A significant shift (∼0.22–0.36 eV) in the optical spectra of the Y2O2S:Eu3+ system corresponding to the fundamental absorption and charge transfer bands, respectively, with respect to the bulk counterpart. The zero and one-dimensional (1D) nanostructures are good candidates for investigating size-induced opto-electronic properties of functional oxysulfides. In order to identify the origin and nature of the electronic transitions observed in the visible region, the photo-induced impedance measurements have been extended to the zero and 1D nanostructures.

Graphical abstractControlled growth of Y2O2S:Eu3+ nanostructures are synthesized for its potential opto-electronic properties in nanoscale semi-conducting luminescent structures.Figure optionsDownload full-size imageDownload as PowerPoint slide