P1.0.20 N-P Transition Sensing Response of Strontium Titanate Ferrite Sol-Gel Thin Films

Chee Lap Chow, Ooi Kiang Tan & Man Siu Tse
Perovskite oxide has been reported as a potential gas sensing material in addition to commonly used binary oxide. Strontium titanate ferrite (SrTi0.6Fe0.4O3) thin film sensors were fabricated using modified sol-gel spin coating technique and annealed at different annealing temperatures. An anomalous n- to p-type transition of oxygen sensing response was observed as annealing temperature increased. A typical p-type sensing response was observed for sensors annealed at temperature of 500 °C and higher. On the other...