Study of the thermoelectric properties of NDI-2Tz polymer and its application on a microthermoelectric generator

Abstract

New strategies and technologies for clean energy generation are essential for minimizing the effects of global warming and meeting growing energy demand, including for wearable devices containing sensors and biosensors. One possibility is to use thermoelectric materials to convert heat into electrical energy. In this project, a thermoelectric microgenerator made of conductive polymers will be produced to turn biosensors self-powered. To make an efficient microgenerator, a fundamental study will be carried out with a new measurement system to determine the Seebeck coefficient and the electrical conductivity of thermoelectric polymers. The experimental system will be validated by obtaining the Seebeck coefficient and the electrical conductivity of thin films of PEDOT:PSS, a polymer already known in the literature. The Seebeck coefficient and electrical conductivity values of the NDI-2Tz polymer synthesized by a partner in the project will also be measured. For a complete thermoelectric characterization and to determine the figure of merit (ZT), the thermal conductivity will be measured with the thermal mirror technique. PEDOT:PSS and NDI-2Tz will then be applied to a thermoelectric microgenerator on a flexible substrate, the microgenerator being characterized in terms of its efficiency and durability. The integration of the microgenerator with biosensors manufactured in flexible substrates will open a new line of research in the Bernhard Gross Polymer Group, as one of the expected contributions of this project. (AU)