Abstract
In this paper, within the effective mass approximation and by using the finite element method, we have studied the photoionization cross section (PCS) and the binding energy of a hydrogenic shallow donor impurity confined in multilayered spherical quantum dot under the effects of temperature, pressure and electric field. Furthermore, the dependence of the donor binding energy and photoionization cross section on the dielectric mismatch and the potential of the outer barrier have been investigated. Our numerical results reveal that the binding energy increases (decreases) with the pressure (temperature and electric field). Furthermore, it is found that as the pressure (temperature and electric field) increases, the position of the PCS peak shifts to the higher (lower) energies.