d) What is an LED? Explain itsprinciple. Name a semiconductorused in L

1.	d) What is an LED? Explain itsprinciple. Name a semiconductorused in LED
Answer» LED is the acronym for “Light Emitting Diode”. LEDs are semiconductor devices that produce light. These were initially used as indicator lights but are now used extensively for indoor, outdoor and decorative lighting. WorkingPrinciple: A light-emitting diode is a two-lead semiconductor light source. It is a p–n junction diode that emits light when activated. When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. The particular semiconductors used for LED manufacture aregallium arsenide (GaAs),gallium phosphide(GaP), orgallium arsenide phosphide(GaAsP).

d) What is an LED? Explain itsprinciple. Name a semiconductorused in LED

Answer»

LED is the acronym for “Light Emitting Diode”. LEDs are semiconductor devices that produce light. These were initially used as indicator lights but are now used extensively for indoor, outdoor and decorative lighting.

WorkingPrinciple: A light-emitting diode is a two-lead semiconductor light source. It is a p–n junction diode that emits light when activated. When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons.

The particular semiconductors used for LED manufacture aregallium arsenide (GaAs),gallium phosphide(GaP), orgallium arsenide phosphide(GaAsP).

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