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Unformatted text preview: ield and a
– The total current density for each carrier will have
diffusion and drift components (Eq. 4-23)
– The total current density is the sum of each carrier Drift and diffusion directions for electrons and
holes in a carrier gradient and an electric field. Particle flow directions are indicated by dashed arrows, and
the resulting currents are indicated by solid arrows. Diffusion of Carriers
– Minority carriers can contribute significantly to total
diffusion current density
• Drift components of current density are proportional to
the majority carrier concentration and minority carrier
concentration is l...
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- Spring '10