Flexible Infrared Photothermoelectric Detectors Based on Graphene/Metallic Junctions with Lowcost Substrates

Junction structures, formed at material interfaces, are essential in controlling charge carrier flow and optimizing device performance. They enhance electrical and optical properties and enable efficient signal collection. Herein, we have successfully designed and fabricated graphene/ Poly(3,4ethylenedioxythiophene) polystyrene sulfonate (PEDOT: PSS) composites-based metallic junction detectors, with the polyethylene terephthalate (PET) substrate improving adhesion and flexibility. Furthermore, final devices are characterized and evaluated under the blackbody source radiation. Finally, the performance of the detectors related to the number of junctions have been compared and evaluated. This research provides insights for future optoelectronic detection designs.