It is conceivable that it is due to the neutral condition requirements, may be internal to the semiconductor minority carrier injection, for example, can the water in the n-type semiconductor injection hole, because the injection of positively charged hole, immediately will be surrounded by a large majority carrier - electronic (electronic can come from the surface or impurities, defects), still can maintain the whole semiconductor is electrically neutral,
For the heat balance of the state of the semiconductor, there is not a balanced carrier, also need to satisfy electrically neutral conditions, for example, when the concentration of injected nonequilibrium electronic Dn, it will appear at the same time not equilibrium hole concentration of Dp, and they are equal in number, or Dn=Dp,
Excuse me:
The first paragraph, after the injection hole, surrounded by electron hole, show neuter inside? Clearly more holes? Are electronic also more from outside?
The second paragraph, the balance hole come from? If the internal excitation, but at the same time more is not the same number of electrons?
Bosses please,
CodePudding user response:
Injection hole refers to inject p-type impurity, impurity into the semiconductor, electronics and semiconductor compound injection of p-type impurity cavity, impurities become recombination center, a semiconductor is neutral, injected impurity is neutral, so the overall into neutral,Non-equilibrium electron as the inverse process is complex, process of nature can produce non-equilibrium hole, hope to discuss,