The space–time-fractional derivatives order effect of Caputo–Fabrizio on the doping profiles for formation a p-n junctionAbdelkader Souigat, Zineb Korichi, Dris Slimani, Yamina Benkrima and Mohammed Tayeb MeftahEur. Phys. J. B, 96 9 (2023) 124DOI: https://doi.org/10.1140/epjb/s10051-023-00591-2