This website requires a browser which supports HTML5.
Some elements of this site will not work correctly until you upgrade your browser.
p-type
n-type
positive
hole
electron
Start
+
+
+
+
-
-
-
-
Reset
-
imobile
dopant
neg
ion
+
imobile
dopant
pos
ion
Electric
Field
+
+
+
+
+
+
+
+
+
+
+
+
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Depletion
zone
Electrons
cross
the
junction
into
the
p-type.
They
leave
behind
their
positive
ions
which
are
immobile
Holes
cross
the
junction
into
the
n-type
material.
They
leave
behind
negative
ions
which
are
imobile
Soon
the
region
at
the
junction
has
only
non-mobile
ions.
There
is
no
mobile
charge
carriers.
It
is
said
that
the
reg
ion
is
depleted
of
charge
carriers.
An
electric
field
is
formed
between
the
two
slabs
of
dopant
immobile
ions.
This
electric
field
prevents
further
charges
from
crossing
the
junction.
The
depleted
zone
at
the
junction
remains
depleted
of
mobile
charge
carriers.
The
pn
semiconductor
junction
Factus
est
X,
MMXIX