An organic field effect transistor (OFET) is an electronic component with excellent signal conversion and signal amplification functions. It has the advantages of low cost, light weight, flexible folding, and solution processing. It is used in intelligent sensing, biomedical detection, and integrated circuits. Other fields have broad application prospects. At present, how to realize low-voltage, low-power flexible high-sensitivity OFET pressure sensor is of great significance for the development of flexible electronic devices such as artificial electronic skin and wearable devices.
Recently, Zheng Qingdong's research team of the State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, in the National Outstanding Youth Science Fund Project, the National Natural Science Foundation International (Regional) Cooperation (NSFC-RGC) Project, and the Chinese Academy of Sciences Strategic Pilot Science and Technology Project (B Under the auspices of the Chinese Academy of Sciences' Frontier Science Key Research Project and Associate Researcher Yin Zhigang, the Chinese Academy of Sciences' Youth Innovation Promotion Association and the Haixi Research Institute Spring Seedling Talent Project have successfully implemented low-voltage, high-sensitivity flexible OFET pressure sensors. In view of the limitations of organic dielectric materials, a binary polymer bulk composite dielectric film with adjustable dielectric constant is constructed, which greatly reduces the operating voltage of the flexible OFET, significantly improves the electrical performance, and achieves excellent cyclic bending stability. Organic Electronics, 2018, 53, 205). Recently, the team collaborated with the Zhang Aping research group of the Hong Kong Polytechnic University to successfully design a polymethyl methacrylate/poly-phase separation structure based on the interface engineering strategy of solution processing for the problem of severe hysteresis of polyelectrolyte dielectric materials and large leakage. Acrylic (PMMA/PAA) organic composite dielectric layer. The high capacitance and low leakage characteristics of the novel double-layer composite dielectric film effectively suppress the hysteresis and greatly improve the mobility and switching current ratio of the flexible OFET and the operational stability. Based on this kind of dielectric film with excellent comprehensive performance, a high-performance floating gate structure flexible OFET pressure sensor has been developed, which successfully achieves sensitivity of up to 56.15 kPa-1 at -5 V low voltage, fast response time and good flexibility. And bending stability. Related results were recently published in Advanced Science (2018, DOI: 10.1002/advs.201701041), which provides design and practical applications for low-cost, low-power, high-sensitivity flexible pressure sensors and their electronics. Useful ideas.
Previously, in the field of photovoltaic applications, the team designed and synthesized a series of p-type polymer donor materials, n-type small molecule acceptor materials and electrode interface layer materials, and studied the structure-activity relationship between material structure and device photovoltaic performance. In Adv. Energy Mater. 2016, 6, 1501493; Adv. Sci. 2016, 3, 1500362; Adv. Mater., 2016, 28, 3359; Nano Energy, 2017, 33, 313; Chem. Mater., 2017, 29 , 7942; Chem. Mater., 2017, 29, 9775 and other publications. 
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