c-Si PV cells emissivity characterization at low operating temperatures for efficiency managementRaquel Fuente, Telmo Echániz, Iñigo González de Arrieta, Irene Urcelay-Olabarria, Manuel J. Tello and Gabriel A. LópezMATEC Web Conf., 307 (2020) 01044DOI: https://doi.org/10.1051/matecconf/202030701044