Current in Diode: Electrons vs Holes

[Danish_Khatri]

My question is related to the flow of current in a diode.
In a metal, the current is completely due to the flow of electrons (Eventhough, we always consider the conventional direction for current). Whereas, the current in diode is said to be the sum of the component of current due to holes and due to electrons. The electronic current can easily pass through the wire through which the diode is connected but where does the hole current go?

 

[Okefenokee]

The holes annihilate with incoming electrons at one metal<->semiconductor junction and holes are created as electrons are removed from the semi-conductor and taken into the metal at another junction. Remember that holes flow in the opposite direction of electrons.

 

[Danish_Khatri]

thanx a lot for ur reply sir, it was really helpful