The electron concentration in an n-type semiconductor is the same as the hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them (a) No current will flow in p-type, but current will only flow in n-type. (b) Current in n-type = current in p-type (c) Current in p-type > current in n-type (d) Current in n-type > current in p-type
By BYJU'S Exam Prep
Updated on: September 13th, 2023
We know that the current through the semiconductor is
I = neAvd = neAµE [As vd = µE]
Where µ is the mobility of charge carriers
We can write it as
In/Ip = neeAµeE/nheAµhE
Table of content
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1.
The electron concentration in an n-type semiconductor is the same as the hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them
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2.
(a) No current will flow in p-type, but current will only flow in n-type.
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3.
(b) Current in n-type = current in p-type
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4.
(c) Current in p-type > current in n-type
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5.
(d) Current in n-type > current in p-type
By further simplification
In/Ip = µe/µh
Here µe > µh
In > Ip
Therefore, the current in n-type > current in p-type.
Summary:
The electron concentration in an n-type semiconductor is the same as the hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them
(a) No current will flow in p-type, but current will only flow in n-type.
(b) Current in n-type = current in p-type
(c) Current in p-type > current in n-type
(d) Current in n-type > current in p-type
The electron concentration in an n-type semiconductor is the same as the hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Current in n-type > current in p-type.
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