Semiconductor doping levels, optimal

In practice, this limitation is not seriously restrictive. Moderate electrolyte concentrations (t 0.5N) are required by solution IR drop concerns, yielding ds on the order of a few angstroms. Optimal semiconductor doping levels are dictated by developing H with the approximate value of a l, where a is the semiconductor absorption coefficient, and H is the depletion width. As a consequence, a typical order of magnitude for H is 1 micron (104 A). Thus the ratio H/ds... 

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