The Study On Light And Electrical Dual-mode Sensor And Application Based On Triboelectric Nanogenerator

With the fast development of portable electronics,there is an urgent demand for the new function of wearable sensors,especially in the field of self-powered.Wearable sensors by the skin that have extensive applications in human body physiological signals monitoring,action recognition,medical rehabilitation,and man-machine interaction.Triboelectric nanogenerator(TENG)is a new energy collection technique,which can transform all kinds of mechanical energy around into electricity.The combination of wearable fabric sensor and TENG,becomes a hopeful candidate for the self-powered wearable sensor technology.In this paper,ZnS:Cu/PDMS thin films were prepared by spin coating method,which can produce real-time,intuitive and visual mechanoluminescence,and can monitor the strength of external forces.ZnS:Cu/PDMS films are flexible,stretchable,hydrophobicity and reusable.By assembling the ZnS:Cu/PDMS film into a thin film friction nano-generator,it can power the small LED light bulb and smartwatch.In addition,we designed and fabricated a flexible and stretchable coaxial triboelectric nanogenerator(TENG)yarn by using coil spring as electrode and support layer,and uniformly surrounded by the mechanoluminescent ZnS:Cu/PDMS material,which can convert mechanical energy into the optical signal in real-time thus enabling observe the external force variation more intuitively and output electrical signals in the same time.The fabric TENG can be obtained by knitting the fiber TENGs.Multilayer staggered fiber networks and a large number of three-dimensional pores provide high air permeability for TENG fabric.Besides,the TENG fabrics can be spliced and trimmed to better consistent with the body size and hook two ends together,which is easy to wear without the assistance of other materials.Moreover,the output of the TENG fabric remained constant after washing for long time.The wearable TENG fabrics as whole-body sensors are able to monitor joint movements in the way of real-time,visual,noninvasive,self-powered,and dual-mode sensing,which has the function of energy harvesting and high-sensitivity sensing,that can contribute to promoting more reliable and sustained applications of TENG fabrics in medical rehabilitation and man-machine interaction.