Abstracts Book - IMRC 2018

• SA5-P026
HYBRID LAYERED NANOPHOSPHOR COMPOSITES: ENHANCED
LUMINESCENCE PROPERTIES
Jesús Uriel Balderas 1 , S. Carmona T. 2 , Luis Mariscal Becerra 3 , Ciro Falcony 3
1 Cinvestav Zacatenco, Nanociencias y Nanotecnología, Mexico. 2 Centro de Investigación en
Ciencia Aplicada y Tecnología Avanzada, Legaría, IPN, Tecnología avanzada, Mexico. 3 Cinvestav
Zacatenco, Física, Mexico.
A new class of Eu3+ based hybrid layered phosphors with tunable excitation
range owing to aggregate formation is reported. The phosphors composed of
layered Y2O3:Eu nanoparticles sensitized with 2-thenoyltrifluoroacetone (TTA)
were characterized by FTIR, SEM, WAXS and photoluminescence spectroscopy.
Aggregation degree between resulting hybrid layered phosphors can be
successfully modulated by the solvent extraction rate and concentration when
doped in PMMA films. The films were obtained from chloroform solutions by
either drop cast or spin coating techniques on glass substrates. Characteristic
red luminescent emission from the films is associated with the Eu3+ ion with a
dominant emission peak due to the 5D0 to 7F2 transition in all cases. The
excitation peak on the other hand, reflects mainly the antenna effect from the
TTA ligand, however, depending on the deposition technique and the phosphor
concentration, the extension in the π-conjugated system (i.e. aggregation)
between hybrid nanoparticles can be allowed, greatly modifying the excitation
spectral characteristics.
Acknowledgment:
The authors would like to thank to Zacarías Rivera and Marcela Guerrero. We
are also thankful for support and grants by Sociedad Mexicana de Materiales,
CONACyT, CINVESTAV and to the Capítulo Estudiantil CINVESTAV-Zacatenco.
Keywords: Hybrid layered phosphors, Luminescence tunability, Aggregates
Presenting authors email: ingenierobalderas@hotmail.com