Reaction-diffusion equations are a type of partial differential equation (PDE) often used to model how large numbers of particles (or agents) move and interact. We will

begin with a light introduction to PDEs using ideas from Calculus 1 and introduce the concepts of diffusion and convection (or drift). We will then discuss several applica-
tions of such systems with a special focus on the semiconductor equations and their application to solar cells.

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