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Recombination is a course of annihilation or destruction of holes and electrons.

There are different mechanisms of recombination significant in the solar cell operation: band-to-band recombination or radiative recombination, Auger recombination, and recombination via defects or traps in the bandgap (often mentioned as Shockley-Read-Hall recombination or SRH). These processes are illustrated if Figure 1.1.

Figure 1.1 The different recombination processes in semiconductors.