Recombination and trapping

[sheraz.pervaiz]

when there is a defect level in semiconductor.It is sometimes referred as recombination centre and sometimes as trapping centre.

When the term recombination or trapping is used .i mean in which application which term is used

 

[aryajur]

The defect is referred to as a recombination or trapping centre since it creates a energy level in the bandgap in that placein the crystal. Because of that energy level, it may trap a electron from the conduction band, which may loose some energy and reach that energy level, or it may trap a hole from the valence band. Or the trapping process can continue in such a way that it traps a electron from the conduction band and then a hole from the valence band and hence results in an effective recombination of the electron hole pair, so it can also be called as a recombination centre.

 

[electronics_kumar]

usually Gold(Ag) will be used as an impurity to create such defect..i mean recombination centre

 

[ssankurathri]

hi
u will use this recombination centres to kill electron life time.
cheers
skr