Study of IR Light Sensitivity of Graphene/PVDF Nanocomposite

The synthesis of graphene/polymer composites has been extensively studied due to their potential applications in catalysis, electronics, biology, magnetism, and optoelectronics. This study investigates the photoconductivity response of graphene/poly(vinylidene fluoride) (Gr/PVDF) nanocomposites under near-infrared (IR) light. The nanocomposite films were prepared by dispersing graphene in a PVDF solution, which was subsequently deposited onto glass substrates. The films were exposed to IR light, and resistance variations were recorded over time. Structural and surface morphology analyses of the fabricated films were performed using X-ray diffraction (XRD) and scanning electron microscopy (SEM). Current-voltage (I-V) measurements revealed p-type conduction behavior in the films. Notably, the photoconductivity response demonstrated a significant enhancement under IR light irradiation, particularly at negative applied voltages. These findings highlight the potential of Gr/PVDF nanocomposites for applications in infrared photodetectors, optoelectronic devices, and sensor technologies.