Abstracts Book - IMRC 2018

• SC4-P089
MYF4 (M=Li, Na, K) & MYF4:Eu 3+ THIN FILMS BY ELECTROCHEMICAL
PROCESSES FOR OPTOELECTRONIC APPLICATIONS
Alexandra Bustamante 1 , Jacob Barranco Cisneros 1 , Ma. Estela Calixto 1 , Antonio Mendez Blas 1
1 Benemerita Universidad Autonoma de Puebla, Instituto de Física, Mexico.
Nowadays solar cells play an important role in electrical energy generation due
the exploitation of solar radiation but it is well known that they are designed to
work in the visible range, limiting thus the conversion efficiency. However, if the
portion corresponding to the UV and/or NIR/IR of the solar spectrum could be
harvested then the efficiencies of the solar cells could be increased. Fortunately,
there are some materials that could improve the spectral range of absorption
through processes know as up- and down conversion when doped with trivalent
lanthanides ions. Up-conversion processes consist on the sequential absorption
of two or more photons of low energy which leads to the emission of light with
higher energy than the excitation energy; so that the emission of those photons
could be collected by the semiconducting absorber film either on a thin film or
in a silicon solar cell configuration. In this work, we have developed a very
interesting methodology that allows us not only to obtain thin films of metal
fluorides such as MYF4 (M=Li, Na, K) by using the electrodeposition technique,
but also Eu 3+ doped MYF4 thin films. We have studied the incorporation of
trivalent lanthanide ions of the different matrices by photoluminescence
characterization; we have also studied the viability of co-doping these matrices
with Er 3+ /Yb 3+ with the sole purpose of finding out if the up-conversion process
is possible.
Acknowledgment:
This work was partially supported by VIEP and DGPI-BUAP for work plan in
Applied Physics Academic Group.
Keywords: Electrodeposition, Solar Cells, Photoluminescence
Presenting authors email: alexabc@ifuap.buap.mx