Electrothermal Modeling and Characterization of Graphene-Based Thin Strips

Abstract

This paper investigates the electrothermal behavior of macroscopic graphene strips, with the aim of modelling the variation of the electrical resistivity with the temperature. Three types of materials are studied, made with different percentage of a low-cost commercial graphene (graphene nanoplatelets). By combining the results coming from an experimental characterization with those given by a numerical simulation, a simple model is derived, where the resistivity is linearly related to the temperature. These materials are found to show a negative temperature coefficient of the resistance in a wide temperature range (−60,+60) °C, that makes them promising for applications such as electronic packages, temperature sensors, thermristors.