Preparation of flexible pressure sensor and electric property study
The scientific research achievement"Study on the Synthesis,electrical behavior and mech-anism of flexible pressure sensor"was transformed into a comprehensive undergraduate experiment in materials major.This experiment designed a field-transistor based pressure senor using a simple etch-ing method,with the flexible polyethylene terephthalate(PET)as the substrate,spinning-coated pol-ymer semiconductor and polymethyl methacrylate insulating layer,UVO surface etching channels of 100-400 nm depth via a shadow mask,buffer layer and finally a gate electrode.A semiconducting an-alyzer was used to characterize the electronic properties of the device,to get the parameters of mobility and on/off ratios;to test the sensitivity and response time under the applied pressure.The results showed that the as-prepared sensor displayed good sensitivity to the applied pressures.This work focu-ses on the preparation and characterization of pressure sensor,containing the organic transistor fabrica-tion,simple patterning,the working mechanism and related parameters,which could be a new basic and research-oriented material physics comprehensive experiment.This experiment is primarily de-signed for third-year students majoring in material physics.It aims to cultivate students'abilities in thinking,problem analysis,and problem-solving,while also promoting knowledge innovation and ex-pansion.
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