Organic Semiconductors in Organic Thin-Film Transistor-Based Chemical and Biological Sensors

The dramatic progress in developing organic semiconductors with many virtues, including flexibility, high conductivity, solution processability, and biocompatibility, has aroused great research interest recently. Organic thin-film transistors (OTFTs), being an important type of organic semiconductor devices, have been successfully used in various high-performance sensors. This review will give a comprehensive description on the state-of-the-art chemical and biological OTFT-based sensors, including humidity, pH, ions, glucose, DNA, antibody-antigen, dopamine, bacteria, and cell-based sensors. Several essential aspects in this research field, including the properties of organic semiconductors, device physics, and the performance of different types of sensors, will be introduced in details.

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