Probing the Sensing Properties of Organic Thin Film Devices at Room Temperature

This thesis focuses on the fabrication and characterisation of humidity and gas sensors operating at room temperature based on a new class of organic semiconductor. Two different types of sensors - capacitive and amperometric - have been fabricated and an extensive study of sensitivity, selectivity and stability of these sensors at different operating frequencies undertaken. The results have widespread implications in areas of industrial engineering and chemical process control to agriculture and nature conservation, to personal health monitoring, smart cities, and national defence.