A Self-powered Wearable Ultraviolet Detector Based On T-ZnO/PVDF Composite Fabric

Ultraviolet radiation is a common phenomenon in life.It mainly comes from sunlight.Excessive ultraviolet radiation can cause serious consequences.Therefore,researchers have developed UV detectors to solve this problem,but the real-time UV monitoring technology for the outdoor is still in a vacant state.With the development of wearable sensors,it can work when the human body is moving,and wearable ultraviolet detectors that respond to the radiation from the sun light in real-time enter the researcher’s field of vision.However,the demand for batteries has always hindered the advanced portability of wearable sensors.In this context,as a potential solution,nanogenerator technology proposes a method to solve power supply questions,which has aroused widespread research interest.All in all,this subject will use the related technology of nanogenerators to create a self-powered wearable ultraviolet detector that can work on the human body and respond to ultraviolet radiation in real-time.Compared with previous similar research results,the device manufactured in this thesis has three outstanding innovations.Firstly,the material system used is innovative.The material cost is low,the manufacturing process is simple,and it is suitable for large-scale applications.The composite material improves the piezoelectric output.The second one is the novel physical working mechanism,which is the principle of piezoelectricity and optoelectronic coupling allows the device to work without an external power supply.This mechanism is expected to be extended to other materials with similar properties.The last one is a special application experiment,which integrates the device in a self-powered system.In conjunction with a simple wireless transmission device,a simple experiment of signal transmission was completed,which pointed out the direction for the next step.The experiments that have been completed have proved that the device can respond to the ultraviolet radiation’s intensity without a battery,and has a response and recovery cycle to the ultraviolet radiation,and can repeatedly make stable and accurate responses to the constant change of ultraviolet radiation.Furthermore,the bending angle or stress cannot affect the device’s response to ultraviolet radiation,so the device can work on human skin.Subsequently,the ability of the self-powered system to supply power to the energy storage device was verified,and the device’s function in the system was proved.Finally,a simple self-powered data wireless transmission system was demonstrated.Finally,this thesis successfully manufactured a self-powered wearable ultraviolet detector,which proved its essential potential as a sensor,proposed an innovative physical mechanism,and designed a simple application for it.Thus,this thesis is a complete research result combining the three nanogenerators,wearable sensors,and ultraviolet detectors.