Effects of surface curvature and electric field on electronic and optical properties of an off-center hydrogenic donor impurity in 2D nanostructuresS. Chouef, O. Mommadi, R. Boussetta, M. Hbibi, A. El Moussaouy, M. Şahin, F. Falyouni and C. A. DuqueEur. Phys. J. Plus, 139 5 (2024) 381DOI: https://doi.org/10.1140/epjp/s13360-024-05164-5