However, if the polarity of the external voltage opposes the built-in potential, recombination can once again proceed, resulting in a substantial electric current through the p–n junction (i.e. substantial numbers of electrons and holes recombine at the junction) that increases exponentially with voltage.
however if the polarity of the external voltage opposes the built-in potential recombination can once again proceed resulting in a substantial electric current through the p–n junction (ie substantial numbers of electrons and holes recombine at the junction) that increases exponentially with voltage