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Influence of Hydrogen Peroxide Addition on Photoluminescence of Y 2 O 3 : Eu 3+ Nanophosphors Prepared by Laser Ablation in Water
Author(s) -
AlMamun Sharif Abdullah,
Ishigaki Takamasa
Publication year - 2014
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.12856
Subject(s) - monoclinic crystal system , photoluminescence , hydrogen peroxide , oxygen , hexagonal phase , phosphor , luminescence , phase (matter) , materials science , nuclear chemistry , analytical chemistry (journal) , crystallography , chemistry , hexagonal crystal system , crystal structure , chromatography , optoelectronics , organic chemistry
Y 2 O 3 : Eu 3+ red phosphors were synthesized by laser irradiation of Eu‐doped Y 2 O 3 sintered targets immersed in water. The photoluminescence (PL) of the nanoparticles ( NP s) was significantly enhanced by adding hydrogen peroxide to the water. Targets were synthesized using three methods, namely, sol–gel ( SG ), homogeneous‐precipitation ( HP ), and solid‐state reaction ( SSR ) followed by sintering. The sintered SG target contained 8.6 wt% of hexagonal oxygen‐deficient byproduct, while the other targets were composed of pure cubic phase. The amount of hexagonal oxygen‐deficient and monoclinic by‐products in the nanophosphors increased to 33 wt% and 27 wt% in irradiated SG ‐ and HP ‐derived targets, respectively. The SSR ‐derived NP s were almost pure cubic phase. Addition of H 2 O 2 to the water minimized the amount of hexagonal oxygen‐deficient and monoclinic byproducts (5.7 wt% and 6.4 wt% for SG ‐ and HP ‐derived NP s respectively). Moreover, the PL of the NP s was enhanced by the formation of a pure cubic phase, and the optimum amount of added H 2 O 2 for maximum luminescence was 5 wt%.