Abstracts Book - IMRC 2018

• SC4-P020
UP-CONVERSION PHOTOLUMINESCENCE OF NaYF4:Yb-Er THIN
FILMS BY ELECTRODEPOSITION
Jacob Barranco Cisneros 1 , Alexandra Bustamante 1 , Ma. Estela Calixto 1 , Antonio Mendez Blas 1
1 Benemerita Universidad Autonoma de Puebla, Instituto de Física, Mexico.
The Up-conversion (UC) luminescence phenomena have been studied through
several decades due to their applications in photonics, photovoltaic devices or
some light sources. Mostly metal fluorides crystalline matrices have shown high
UC response although their development has been affected by the difficulty to
synthesize them not only as a single crystal but also as thin films or powders
while retaining their optical characteristics in order to be used directly in such
applications. In this study we have used the electrodeposition technique to
synthesize NaYF4 thin films doped and co-doped with trivalent lanthanides (Ln 3+ )
ions on glass/FTO substrates, five different lanthanides were used in the doping
process: Nd 3+ , Eu 3+ Tb 3+ , Er 3+ and Yb 3+ , and in the co-doping of NaYF4 thin film
the pair of Yb 3+ -Er 3+ ions were used for up-conversion process. We also report
the characterization results of their structural properties by XRD studies,
chemical composition and morphology by SEM/EDS, besides optical emission of
Ln 3+ by PL spectroscopy. The results confirm the crystalline quality of the thin
films which reinforce the idea of a semi-epitaxial deposition process. The
NaYF4:Yb-Er thin films were analyzed under an excitation wavelength with a near
infrared laser of 980 nm, photoluminescence results have shown that the thin
films exhibited visible up-conversion luminescence Er 3+ as a result of energy
transfer Yb 3+ .
Acknowledgment:
This work was partially supported by VIEP and DGPI-BUAP for work plan for
Applied Physics Academic Group.
Keywords: Electrodeposition, NaYF4, Up-conversion luminescence
Presenting authors email: jacob@ifuap.buap.mx