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Based on the advantages of light weight, wide source of materials, and low cost, organic thin-film transistors (OTFTs) have shown a wide application prospect and have become the frontier areas of international concern. With the continuous rise of OTFT performance indicators, the construction of multi-function devices has gradually become one of the most important development directions in this field. In recent years, researchers at the Organic Solids Laboratory of the Institute of Chemistry, Chinese Academy of Sciences have conducted systematic research on the preparation and functional applications of multifunctional OTFTs. In previous studies, they cooperated with domestic and foreign scientific researchers to combine the construction of ultra-thin devices, chemical adsorption of active layers, and gas reactions to achieve selective and sensitive detection of multiple gases, providing new ideas for constructing new gas sensors (Adv. Mater., 2013, 25, 1401; Adv. Mater., 2014, 26, 2862).
OTFT has the functions of signal conversion and signal amplification. Theoretically, it is one of the ideal carriers for constructing ultra-high-sensitivity pressure sensors. Although OTFT pressure sensors (≤ 8.4 kPa-1) have been fabricated based on flexible dielectric layers, these devices face the problem of the elastic limit of dielectric layers, and ultra-high sensitivity pressure sensors (≥100 kPa-1) are difficult to use. achieve. Recently, researchers at the Chemical Solids Laboratory have made significant progress in OTFT pressure sensing research. For the first time, researchers successfully constructed a flexible floating gate organic thin-film transistor (SGOTFT), effectively avoiding the problem of the dielectric limit of the dielectric layer and making the pressure sensing characteristics of the device dependent on the mechanical properties of the grid. Based on this principle, researchers have constructed ultra-high-sensitivity pressure sensors with sensitivities up to 192 kPa-1, which is the best result reported for flexible pressure sensors. In addition, these devices exhibit excellent flexibility, stability, and low-voltage operating characteristics. The corresponding device arrays have been successfully applied to the detection of pulse in the human body and the tracking of the motion of fine objects, and have been shown in artificial intelligence and wearable health monitoring. Very good application prospects. The relevant research results were published in Nature Communications, 2015, 6,6269).
Based on the series of laboratory progress in related areas, they were invited to publish a review article in the paper "Material Horizons" (Mater. Horiz., 2015, 2, 140), summarizing the flexible pressure sensor in artificial intelligence and health monitoring. The application of research progress, and was selected as the current cover article.
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