Diode Working Principle
Time：2012.08.03 Source： View hits：
Crystal diode as a by
p type semiconductor and n type semiconductor form the p-n ", in its
interface in formation on both sides of the space charge layer, and has a
self-built electric field. When there is no to an external voltage, because-n
and p concentration caused by poor carriers on both sides of the current and
spread from the current equal caused by electric field and be in electric drift
balance. When the outside have positive voltage bias, the electric field and
from the outside world electric field or each other to the spread of the
carriers away effect increased current caused the positive current. When the
outside world reverse voltage bias, external electric field and self-built
electric field further strengthen, form in a reverse voltage range and reverse
bias voltage value of reverse current I0 not saturated. When additional reverse
voltage high to certain degree, p-n "space charge in the electric field
strength achieves critical value of produce carriers multiply process,
producing a large amount of electronic cavitation, and produced the numerical
big reverse current breakdown, breakdown phenomenon called diode
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