The classic drift-diffusion model is not able to deal with superlattice or some other quantum structure, both at equilibrium and out of it. The Localization Landscape model is able to account those quantum effects by introducing a new effective potential calculated form a second order differential equation derived for the Schrödinger eigenvalue problem. This effective potential takes into account of the quantum effects by reshaping the original potential barriers seen by the electrons or holes, by lowering it when tunnelling effects are present or by increase the barrier height where quantum confinement occurs. This model allows also to predict the localization regions of carriers and their ground state energy and their local density of states.