Abstract
NaYF 4:Eu/Sr nanocrystals were synthesized by a hydrothermal method. Tunable photoluminescence of the NaYF 4:Eu nanocrystals was successfully achieved by codoping with Sr 2+ ions. With increasing Sr 2+ concentration, not only the X-ray diffraction peaks of the nanocrystals become broader, but also the positions of them shift toward larger lattice parameters. Eu 3+ and Eu 2+ have been found to coexist in an NaYF 4:Eu/Sr. The Eu 3+/Eu 2+ emission intensity ratio changed with the Sr 2+ concentration and excitation wavelength. More interestingly, the spectral configurations of Eu 2+ and Eu 3+ also varied with the excitation wavelength, indicating that the nanocrystals have multiple luminescence centers or emitting states.
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.
