Abstract
In this work, we fabricated the upconversion inverse opals with hierarchical rare-earth fluoride arrays by inducing NaYF4:Yb3+/Er3+ nanocrystal self-assembly inside the voids of a self-organized PS template via the MIMIC method. We induced cubic phase α-NaYF4:Yb3+/Er3+ nanocrystals to assemble in polystyrene (PS) colloidal crystals. After removing the PS colloidal template, highly ordered 3D inverse opal photonic crystals (PCs) hierarchical arrays consisting of densely packed cubic or hexagonal NaYF4:Yb3+/Er3+ nanocrystals were obtained. The photonic band structure of the materials can be controlled in a way that modifies the upconversion (UC) photoluminescence by adjusting the macroporous diameter of the NaYF4 photonic crystals. It is found that the photonic stop band can modify the emission band in the spectral region where the overlap occurs, producing a depression in the emission band corresponding to the stop band position, while the photoluminescence lifetime of the Er3+ ions in the inverse opals is also increased.
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.
