Abstract
In many applications like sensors, displays, and defoggers, there is a need for transparent and efficient heater elements produced at low cost. For this reason, we evaluated the performance of graphene-based heaters with from one to five layers of graphene on flexible and transparent polyethylene terephthalate (PET) substrates in terms of their electrothermal properties like heating/cooling rates and steady-state temperatures as a function of the input power density. We found that the heating/cooling rates followed an exponential time dependence with a time constant of just below 6 s for monolayer heaters. From the relationship between the steady-state temperatures and the input power density, a convective heat-transfer coefficient of 60 W·m−2·°C−1 was found, indicating a performance much better than that of many other types of heaters like metal thin-film-based heaters and carbon nanotube-based heaters.
Highlights
Transparent resistive heaters were proposed for a variety of applications, such as sensors [1], displays [2], defoggers [3], and defrosters [4]
We found that the resistance the transferred graphene films was significantly increased after a one-year exposure to air, with of the transferred graphene films was significantly increased after a one-year exposure to air, with increases for some samples as much as three to five times, which is much larger than reported in a increases for study some [30]
Based on the assumption that graphene, with its excellent electrothermal properties, could be a perfect material for transparent heaters in many applications, we designed and fabricated a set of graphene-based heaters with from one to five layers of chemical vapor deposition (CVD) graphene grown on copper and transferred to a polyethylene terephthalate (PET) substrate
Summary
Transparent resistive heaters were proposed for a variety of applications, such as sensors [1], displays [2], defoggers [3], and defrosters [4]. Graphene-based heaters were recently proposed with graphene obtained by chemical vapor deposition (CVD) [3], from reduced graphene oxide [16,17,18], and from graphene aerogels [19]. We present the results of a study of the electrothermal properties of transparent undoped few-layer graphene-based heaters where from one to five layers of graphene grown by CVD were transferred to flexible polyethylene terephthalate (PET) substrates. Our observations of their heating/cooling rates at different power densities are reported in the upcoming sections
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
