Thin-film transistors for chemical sensor applications

An electronic device for determining the identity of a chemical compound, the device comprising a first transistor and a second transistor;

• wherein the first transistor comprises a first gate electrode, a first source electrode, a first drain electrode, and a first semiconducting layer, the first semiconducting layer comprising a first semiconductor polythiophene and carbon nanotubes;
• wherein the second transistor comprises a second gate electrode, a second source electrode, a second drain electrode, and a second semiconducting layer, wherein the second semiconducting layer comprises a second semiconductor polythiophene and does not contain carbon nanotubes;
• wherein the first transistor and the second transistor, when exposed to the chemical compound, produce a change in charge carrier mobility which is indicative of the chemical compound, and
• the ratio of the change in charge carrier mobility of the first transistor and the second transistor confirms the identity of the chemical compound.