Mention the important considerations required while fabricating a pit 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 ?
- It is a heavily doped p-n junction.
- The reverse breakdown voltages of LEDs are very low.
- The semiconductor used for fabrication of visible LEDs must atleast have a band gap of 1.8 eV.
The order of band gap is about 3 eV to 1.8 eV.