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Particle Size and Crystal Phase Dependent Photoluminescence of La 2 Zr 2 O 7 :Eu 3+ Nanoparticles
Author(s) -
Pokhrel Madhab,
Brik Mikhail G.,
Mao Yuanbing
Publication year - 2015
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13734
Subject(s) - photoluminescence , pyrochlore , materials science , fluorite , quantum yield , particle size , crystal (programming language) , nanoparticle , phase (matter) , analytical chemistry (journal) , cerium , crystallography , crystal structure , chemistry , fluorescence , nanotechnology , optics , metallurgy , physics , optoelectronics , organic chemistry , programming language , chromatography , computer science
Herein, La 2 Zr 2 O 7 :5% Eu 3+ nanoparticles (NPs) with different sizes have been synthesized for the first time through a modified facile molten salt process using a single‐source complex precursor of La(OH) 3 ·ZrO(OH) 2 :Eu(OH) 3 · n H 2 O. It was found that the concentration of the added ammonia to co‐precipitate the corresponding metallic ions to form the precursor can influence the final particle size of the fluorite La 2 Zr 2 O 7 :5%Eu 3+ NPs. Furthermore, the crystal phase of the La 2 Zr 2 O 7 :5%Eu 3+ NPs was transferred from fluorite to pyrochlore after thermal treatment at 1000°C. The relationship between photoluminescence (PL), quantum yield (QY), particles size and crystal phase has been further investigated through fluorescence decay, site symmetry, and Judd–Ofelt (J–O) analysis. Specifically, PLQY and lifetime increase with increasing particle size of the fluorite La 2 Zr 2 O 7 :5%Eu 3+ NPs. Additionally, crystal phase transfer from fluorite to pyrochlore resulted in large PLQY decrease and moderate lifetime increase in the La 2 Zr 2 O 7 :5%Eu 3+ NPs.