Instead, it must wait until it passes through the depletion region, and into the p-type region, where it is met with a huge concentration of holes, and can recombine. |
The silicon was doped with boron to make a p-type semiconductor. |
We could create, for example, a thin n-type region surrounded by a p-type region. |
The positive triode rectifier switch has the upper electrode as a cathode, the lower electrode as an anode, and the p-type semiconductor layer. |
In these devices, the emitter and collector are both a p-type semiconductor material and the base is n-type. |
If you go back and look at the early days of the semiconductor revolution, you see that there were many ideas for how to build gate sets out of n-type and p-type transistors. |