Abstract
In this work we study the luminescence properties of europium-doped titanium dioxide and tellurium oxide thin films enhanced by gold plasmonic nanostructures. We propose a new type of plasmon structure with an ultrathin dielectric film between plasmonic platform and luminescent material. Plasmonic platforms were manufactured through thermal annealing of the gold thin film. Thermal dewetting of gold film results in spherical gold nanostructures with average dimensions of 50 nm. Both, luminescent TiO2:Eu and TeO2:Eu films were deposited by RF magnetron sputtering from mosaic targets. The morphology of the gold nanostructures was investigated by SEM and TEM, while the composition of oxides film was analyzed by XPS. Luminescence properties were studied on the basis of excitation and emission spectra. The experiments show that the additional dielectric layer enhances the luminescence intensity. Such structures could be potential candidates as phosphors in white LEDs.
Highlights
The rapid development of optoelectronics leads to challenges in the search for new luminescence materials
The quality of the gold plasmonic platforms was examined by scanning electron microscope (SEM) and TEM
The high-resolution transmission electron microscope (HRTEM) image of a cross section of a single nanoisland is shown in Figure 2b [25,26]
Summary
The rapid development of optoelectronics leads to challenges in the search for new luminescence materials. The additional Al2O3 dielectric layer separates plasmonic gold nanostructures and TiO2:Eu luminescent film, which changes the conditions of electromagnetic interaction between plasmons and luminescent material. For the luminescence layer deposited directly on a plasmonic platform, without dielectric film, a transmission minimum at 650 nm is visible.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
