Materials Research | |
Efectos de la exposición a vacío y aire de películas de SnO2 con distinto espesor | |
Miguel Adolfo Ponce1  Miriam Susana Castro1  Osvaldo Julio Moncada1  Maria Dolores Echeverría1  Celso Manuel Aldao1  | |
[1] ,Universidad Nacional de Mar del Plata Instituto de Investigaciones en Ciencia y Tecnología de Materiales Mar del Plata,Argentina | |
关键词: SnO2; conduction mechanisms; air; | |
DOI : 10.1590/S1516-14392003000400015 | |
来源: SciELO | |
【 摘 要 】
Gas sensors based in semiconductor oxides show a change in the resistance when they are exposed to certain gaseous atmospheres. In this paper, the influence on the sensor electrical resistance with the film thickness in vacuum and air are studied. The conduction process is analyzed considering the existence of Schottky potential barriers at the grain boundaries. These barriers are affected by the intergranular gas diffusion. This process increases the barrier height and width, altering the electrical resistance. Also, the influence of the diffusion process on the stabilization time is analized.
【 授权许可】
CC BY
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
【 预 览 】
Files | Size | Format | View |
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RO202005130151982ZK.pdf | 640KB | download |