The Research On Flexible Photo-Thermoelectric Nanogenerator

The batteries were applied in wearable electronics as a mainly energy supply.For the trillions of batteries with wide distribution and limited life,replacing or recycling them is a difficult or even impossible task.Owing to the constant heat energy in the human body and environment,it's possible to provide inexhaustible energy for wearable electronics through thermoelectric nanogenerators.This study proposed flexible photo-thermoelectric nano generators based on MoS2/PU photothermal film and the Te/PEDOT thermoelectric film to improve the low temperature difference in wearable thermoelectric technology,and some researches were done on its material characteristics,device performance and wearable applications,as follows:1.The photothermal performance of MoS2/PU films with different MoS2 concentrations were studied systematically.The higher concentration of MoS2,the higher temperature of the film with improved performance.However,the thin film cracked when the concentration reached to a certain value,which is not conducive to the formation and transfer of the film.Thus 2wt.%MoS2 was preferably chose.2.The flexible photo-thermoelectric nanogenerator in double-electrode mode was fabricated with optimized MoS2/PU film.and Te/PEDOT film.MoS2/PU film can absorb and convert the ambient light into heat to improve the low temperature difference of the thermoelectric generator reported.The Seebeck coefficient is 42 ?V/K,better than some reported before.Outputs can be adjusted via illumination time or laser power density.And this device is expected to be used in the self-powered system.3.Body heat-photo-thermoelectric nanogenerator was firstly proposed with optimized three-electrode structure based on PTENG.Body heat and ambient light can be harvested simultaneously and stably to overcome the low temperature difference of wearable thermoelectric devices and make photo-thermoelectric devices work without light.The Seebeck coefficient of BH-PTENG reaches to 94 ?V/K.It may drive mini electronics because of small internal resistance.