Question

Why diode is connected in reverse bias to find energy gap?

Answer 1

Because when reversed biased.. the band gap increases to its maximum size… there is no conduction possible…Now it will require some energy to break this band gap and allow conduction through this insulator, which is basically the energy gap of diode…. Look it this way, if diode is forward biased then there is no restriction to electrons.. so we cannot determine energy gap.. so we have to reverse bias it



i hope it helps..___