Mention the important considerations required while fabricating a p-n

1.	Mention the important considerations required while fabricating a p-n junction diode to be used as a Light Emitting Diode (LED). What should be the order of band gap of an LED if it is required to emit light in the visible range ?
Answer» (i) lt is a heavily doped p-n junction. (ii) The reverse breakdown voltages of LEDs are very low. (iii) The semiconductor used for fabrication of visible LEDs must at least have a band gap of 1.8 eV. The: order of band gap is about g eV to r.S eV

Mention the important considerations required while fabricating a p-n junction diode to be used as a Light Emitting Diode (LED). What should be the order of band gap of an LED if it is required to emit light in the visible range ?

Answer»

(i) lt is a heavily doped p-n junction.

(ii) The reverse breakdown voltages of LEDs are very low.

(iii) The semiconductor used for fabrication of visible LEDs must at least have a band gap of 1.8 eV.

The: order of band gap is about g eV to r.S eV