The
characteristics of LED:
(i)
LED
chip’s PN junction is biased in a forward direction.
(ii)
Free charged is forced (overcome vf) into the depletion zone.
(iii)
Electrons
recombine with holes and some of these recombinations emit light.
(iv)
The color of the light is biased on the material selection, which directly
affects the forward voltage of the LED.
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