Junction depth, semiconductor materials

A potential gr< dient can be created by forming an interface or junction with a semiconducting material. Metal-semiconductor, p-n semiconductor, and semiconductor-electrolyte interfaces have been used in the construction of photovoltaic cells.25 27 The interface in a p-n junction photovoltaic cell can be constructed by doping the surface of an n or p-type semiconductor with atoms that invert the semiconductor type. These atoms are then thermally diffused into the host semiconductor to an optimal depth. Diffusion rates... 

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