N-type In (or Al) doped Cu2O thin films by magnetron sputtering A. Lakshmanan, Zachariah C. Alex and S. R. Meher Eur. Phys. J. Plus, 139 1 (2024) 62 Published online: 19 January 2024 DOI: 10.1140/epjp/s13360-023-04846-w