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 region ?

As the LED is voltage sensitive hence when high energy strikes it can get easily damaged by the potential provided by the energy of photon striked ...for this a low resistance must be connected to prevent it from damage ...order of band gap is 1.8ev