Transparent conductive
oxides from doped and undoped
vanadate-borate-phosphate systems for photonic
devices
The PHOTOTCO project
proposes to obtain transparent conductive oxides (TCO) from vanadate – borate –
phosphate systems with and without dopants. The TCO will be made through the
conventional melt-quenching technique and the sol-gel method. The compositions will
be created by varying the molar percentage of vanadium oxide from 50 to 80% and
of the two dopants from 0 to 10%. The parameters
that influence the obtaining process and the photonic properties of the final
materials will be established. The optimization of these materials will also be
pursued.
All the samples will be characterized using: atomic force microscopy,
scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray
photoelectron spectroscopy, X-Ray diffraction for thin films (including XRR),
UV-Vis-NIR spectroscopy, and Fourier-transform infrared spectroscopy. The
MILA-5000 compact unit for rapid thermal processing and testing of materials
will be used for the first time for these systems. 4200-SCS Semiconductor
Characterization System and EPS150TESLA Probe Station will be used for complex
electrical measurements, including DC current-voltage (I-V) characteristics, AC
impedance measurements (including C-V characteristics). The chemical stability
and thermal characteristics (dilatometry and calorimetry) will be, also,
analyzed.
The obtained vanadate systems will have better electrical
conductivity in the conditions of enhanced chemical and thermal stability.