Assume we have a diode. Well, I was wondering what is happening if we connect the negative terminal of the battery to the p type region and the positive terminal of the n type region to the positive terminal of the battery and the battery provides voltage below 0.7V.
If the voltage provided by the battery was larger than 0.7V, then those things would happen:
- The depletion region of the diode would be increased.
- Current would only flow due to minority charge carrier and carrier generation by temperature.
But what would happen if the battery provides voltage less than 0.7V?