P2.0.6 Schottky Type Ag-TiO2 Hydrogen Sensor: Gas Sensing Mechanism and Modeling

S. Rahbarpour & S. M. Hosseini-Golgoo
The use of Schottky type noble metal-metal oxide gas sensors is spreading due to their unique gas sensing properties. In this paper, hydrogen detection using Ag-TiO2-Ti diodes is reported. The I-V characteristics of these diodes are highly sensitive to the partial pressure of hydrogen contamination in the surrounding atmosphere. At the reducing atmosphere the energy barrier height established at the Ag-TiO2 junction reduces due to silver work function variation and the junction behaves as an...