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The influence of surface properties on minority carrier lifetime and sheet conductance in semiconductors

A M White

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Surface accumulation of carriers not only affects the conductance of a semiconductor sample, but is traditionally invoked as a means of reducing the effects of surface recombination velocity on minority carrier lifetime. It is shown that circumstances can easily arise where the latter effect is actually reversed, to the detriment of device performance. Simple expressions are derived for the effective surface recombination velocity, and the relationship between minority carrier lifetime and sheet conductance in truly surface dominated samples.


PACS

72.20.Jv Charge carriers: generation, recombination, lifetime, and trapping

73.25.+i Surface conductivity and carrier phenomena

Subjects

Condensed matter: electrical, magnetic and optical

Semiconductors

Surfaces, interfaces and thin films

Dates

Issue 1 (14 January 1981)



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