Principle , construction and working of homojunction laser diode
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In P-n junction diode, the flow of electrons is from n-diode and they move towards the hole in the P-junction.
Explanation:
- In P-n junction diode, the flow of electrons is from n-diode and they move towards the hole in the P-junction.
- In reverse biased junction, the width of the depletion region gets expanded when the potential barrier is increased.
- Whereas the electric field is strong in the depletion region because electrons do not move freely between the holes.
- At this time, the energy becomes higher than the band gap when photons are released in this area of the diode.
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