Document Type
Article
Publication Date
7-31-2018
Abstract
Ln 3+ -ion-doped nanomaterials possess excellent properties because of their high color purity, longer excited state lifetime, narrow emission, and large Stokes shifts. In this work, we studied the correlation between the luminescence properties of La 2 Hf 2 O 7 :Eu 3+ pyrochlore nanoparticles (NPs) synthesized by a molten salt synthesis (MSS) method at a relatively low temperature and several MSS processing durations (from 1 to 12 h). We synthesized these NPs with different sizes just by changing the MSS processing time without subjecting to high temperature. Raman spectroscopy confirmed the stabilization of the ideal pyrochlore structure of the La 2 Hf 2 O 7 :Eu 3+ NPs at various MSS processing durations. The synthesized NPs exhibited bright red emission under UV, visible, and X-ray excitations, highlighting their potential applications as a red phosphor and scintillator. As the MSS processing time was increased from 1 to 12 h, a spectral change in the position of the charge transfer state in the La 2 Hf 2 O 7 :Eu 3+ NPs was observed. The sample processed by the MSS with a duration of 3 h exhibited the highest luminescence intensity, which was attributed to its optimum crystals with least surface defects and less agglomeration. The obtained results strongly and unambiguously indicate the brighter side of this new type of pyrochlore-based NPs in the fast growing field of solid-state lighting and scintillator materials.
Recommended Citation
Zuniga, J. P., Gupta, S. K., Abdou, M., & Mao, Y. (2018). Effect of Molten Salt Synthesis Processing Duration on the Photo- and Radioluminescence of UV-, Visible-, and X-ray-Excitable La2Hf2O7:Eu3+ Nanoparticles. ACS Omega, 3(7), 7757–7770. https://doi.org/10.1021/acsomega.8b00987
First Page
7757
Last Page
7770
Publication Title
ACS Omega
DOI
10.1021/acsomega.8b00987
Comments
© 2018 American Chemical Society. Original published version available at http://doi.org/10.1021/acsomega.8b00987.