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GROUP MEMBERS
ADNAN ASHRAF BEEF16E031
IHTESHAM MUJAHID BEEF16E033
TALHA SARFRAZ BEEF16E035
LED(Light Emitting Diode)
LED
A light Emitting Diode (LED) is an optical
semiconductor device that emits light when voltage
is applied. In other words, LED is an optical
semiconductor device that converts electrical energy
into light energy.
Layers of LED
A Light Emitting Diode (LED) consists of three layers:
p-type semiconductor , n-type semiconductor and depletion
layer. The p-type semiconductor and the n-type
semiconductor are separated by a depletion region or
depletion layer.
P-type semiconductor
N Type Semiconductor
depletion layer.
DIRECT AND INDIRECT BAND
WORKING
VISIBILITY OF COLOURS
Gallium Arsenide (GaAs) – infra-r ) –
high-brightness red, orange-red,
orange, and yellow.
Gallium Phosphide (GaP) – red,
yellow and green.
Aluminium Gallium Phosphide
(AlGaP) – green
ed.
Gallium Arsenide Phosphide (GaAsP)
– red to infra-red, orange.
Aluminium Gallium Arsenide
Phosphide (AlGaAsP
• Low power
• Operate on 5v
• fast action
• Long life
• More efficient
ADVANTAGES

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LED-light emitting diode

  • 1.
  • 2. GROUP MEMBERS ADNAN ASHRAF BEEF16E031 IHTESHAM MUJAHID BEEF16E033 TALHA SARFRAZ BEEF16E035
  • 4. LED A light Emitting Diode (LED) is an optical semiconductor device that emits light when voltage is applied. In other words, LED is an optical semiconductor device that converts electrical energy into light energy.
  • 5. Layers of LED A Light Emitting Diode (LED) consists of three layers: p-type semiconductor , n-type semiconductor and depletion layer. The p-type semiconductor and the n-type semiconductor are separated by a depletion region or depletion layer. P-type semiconductor N Type Semiconductor depletion layer.
  • 9. Gallium Arsenide (GaAs) – infra-r ) – high-brightness red, orange-red, orange, and yellow. Gallium Phosphide (GaP) – red, yellow and green. Aluminium Gallium Phosphide (AlGaP) – green ed. Gallium Arsenide Phosphide (GaAsP) – red to infra-red, orange. Aluminium Gallium Arsenide Phosphide (AlGaAsP
  • 10. • Low power • Operate on 5v • fast action • Long life • More efficient ADVANTAGES