Published in:
Key Engineering Materials, 605 (2014), Seite 515-518
Language:
Not determined
DOI:
10.4028/www.scientific.net/kem.605.515
ISSN:
1662-9795
Origination:
Footnote:
Description:
<jats:p>Thin layers of tin oxide have numerous applications in various branches of microelectronics as transparent conductors and active elements in chemical sensors. While forming different metallic contacts to these layers are required for different applications, noble metals are of particular use in gas sensor fabrication as these devices operate at elevated temperatures and harsh environments. The background literature on the quality and electronic features of gold and silver contacts on SnO<jats:sub>2</jats:sub> layers is limited. Moreover, it has been shown that both gold and silver electrodes exhibit different electronic features on TiO<jats:sub>2</jats:sub> at different thermal and atmospheric conditions. Here, we report the I-V characteristics of Au/SnO<jats:sub>2</jats:sub> and Ag/SnO<jats:sub>2</jats:sub> contacts formed on SnO<jats:sub>2</jats:sub> layers deposited on SiO<jats:sub>2</jats:sub> substrates by ultrasonic spray pyrolysis. The obtained I-V plots proved the ohmicity of the Au/SnO<jats:sub>2</jats:sub> and Ag/SnO<jats:sub>2</jats:sub> contacts to be independent from the temperature, in the range of 300-700 K, and the composition of the surrounding atmosphere.</jats:p>