Self-powered graphene thermistor

Highlights: • Successfully transferred the graphene mono-layer on the surface of P(VDF-TrFE). • Generated p-i-n regions in the graphene monolayer by electrical poling. • The graphene-P(VDF-TrFE) hybrid device shows an unconventional and extraordinary property of generating current with temperature even without external perturbation (i.e. without applied bias, optical illumination or input voltage). Self-powered flexible graphene thermistor device is successfully fabricated by modifying the graphene layers with ferroelectric polarization. Chemical vapor deposited graphene monolayer was transferred to the surface of a ferroelectric polymer poly[(vinylidenefluoride-co-trifluoroethylene)] P(VDF-TrFE) thin film. By utilizing alternating polarization charge, the graphene surface contains polarization induced hole-rich, intrinsic and electron-rich regions (p-i-n regions). The potential difference created in the graphene layer leads to the drift of the extra carriers created in the graphene monolayer with increasing temperature and gives rise to an exemplary self-powered or autonomous thermistor.