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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:46 |
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Conference: Bucharest University Faculty of Physics 2023 Meeting
Section: Solid State Physics and Materials Science, Optics, Spectroscopy, Plasma and Lasers
Title:
STRUCTURAL AND ELECTRICAL INFLUENCE OF VARIABLE Ni-8YSZ THIN FILMS OBTAINED by RADIO FREQUENCY-PULSED LASER DEPOSITION
Authors:
R. Pascu(1), G. Epurescu(1), R.Birjega(1), B. Mitu(1), S. Somacescu(2)
Affiliation:
1) National Institute for Laser Plasma and Radiations, Atomistilor Str. 409, P.O. BOX MG 07 Măgurele 077125, Romania, rovena.pascu@inflpr.ro
2) Institute of Physical Chemistry "Ilie Murgulescu202 Splaiul Independentei st., 060021, Bucharest, Romania
E-mail
rovenav@gmail.com
Keywords:
Variable Ni-YSZ thin films, µSOFC, Planar l Oxygen Sensor, RF – PLD Techniques, Optical and Structural Characterization, Dielectric Spectroscopy Measurements
Abstract:
Future generation of micro solid oxide fuel cells (µSOFC) and micro planar ceramic oxygen sensor (l sensor) have to operate at lower temperature (350 - 450°C) due to application of thin film technologies. Thin films of Ni-YSZ anodes or reference electrodes were fabricated by Pulsed Laser Deposition – Radio Frequency (PLD-RF) by variation the level of doped Ni between 0-50%. The structural, optical and electrical characterization of 10%, 15%, 20% and 50% where made with X-ray Diffraction (XRD), Atomic Force Microscopy (AFM), Scanning Electron Microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Variable Spectroscopic Ellipsometry (VVASE) and Dielectric Spectroscopy (EIS). Ni-8YSZ thin films show a well- defined porous network and electrical conductivity; at high level Ni doping it shows metallic behavior.
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