Answer:
Led Definition: LED Full Form:
Light Emitting
Diode<
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Led Description: LED meaning or
Full form is
Light Emitting
Diode.
LED means
light-emitting
diode is a semiconductor
light source that Emits lights when applying a predefined voltage.
Basically, this is a PN-Junction Diode, which emits light when a voltage above the threshold voltage is applied.
LED is used in much
electronic equipment
today due to its very
good quality.
LED is the latest invention, used by most
people today. This is the reason why the popularity and
use of
LEDs are increasing
day by
day.
The LED is
made by merging
P and
N-type semiconductor materials.
As we
know, silicon and germanium are used in a normal semiconductor
diode, but this semiconductor material is not used in light-emitting diodes. Gallium arsenide (GaAs) or gallium arsenide phosphate(GaAsP) is used in its place.
This material is used in LED
due to its
special characteristics. This material has this property, it emits light, not
heat when applying voltage.
LED is manufactured as a
forward bias device.
LED works on the principle of Electroluminescence.
The Property of semiconductor material by which it converts
electrical energy into Light
Energy is called Electroluminescence.
as
said earlier LED is a
Forward Bias semiconductor device, which means it will
start working when the
p terminal of the diode will be connected to the positive potential of a
battery, and the
N terminal of the device to the negative terminal of the
battery.
so the holes in the
P side experience repulsion because of the positive voltage applied by the battery and the electrons in the N
side experiences repulsion due to negative supply by the
Battery.
due to this repulsion, the electrons
start moving from the conduction
band to the Valance
band.
During their movement Electrons releases some
energy, but in the
case of a LED, it emits Light energy, because of the characteristic of the material of LED.
Today LED is available in all colours, and we can choose
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