N-Doped Graphene Film Prepared by Rapid Thermal Shock for Ultra-Sensitive Temperature Reading

•A novel rapid thermal shock method was adopted to achieve the fast preparation of nitrogen-doped graphene film within 10 s.•The NG film prepared through rapid thermal shock method has a high content of nitrogen element, among which the content of graphite nitrogen reaches more than 60%.•Thanks to the presence of numerous graphite nitrogen in NG, the electrical conductivity and the Seebeck coeffience of NG films improve a lot. Meanwhile, the introduction of N element also causes the thermal conductivity of the NG film to decline precipitatingly, according to the calculation results of desity function theory.•A novel temperature sensor was fabricated based the NG film, it is found that the device has good accuracy at both room temperature and high temperature (more than 600 ℃), and shows excellent sensitivity temperature changes.