Laser-induced graphene-based heaters from polyimide film

Abstract

A new and promising technique called laser-induced graphene (LIG) uses a CO₂ laser to create graphene on a flexible polyimide substrate in a single step without the need for additional steps. The structure and surface properties of the graphene were analyzed using Raman spectroscopy and scanning electron microscopy. This study also investigates the electrothermal properties of the fabricated heaters by varying the applied voltage concerning temperature, current, and power to assess their performance. The area of the three manufactured heaters was modified to evaluate its impact on performance, along with a new design that accommodates the bending of the heater, allowing it to function as a flexible device. The results indicated that the resistance of the heater decreased as the area increased, leading to an enhanced thermoelectric response and improved performance. Furthermore, the heater's compact size and lightweight nature highlight its significance for the development of flexible electronics.