Direct observation of infrared electroluminescence of high mobility graphene field-effect transistorsSylvio Rossetti, Aurélien Schmitt, Loubnan Abou-Hamdan, Rémi Bretel, Patrick Bouchon, Emmanuel Baudin and Yannick De WildeEPJ Web Conf., 287 (2023) 04003DOI: https://doi.org/10.1051/epjconf/202328704003