When the reverse voltage applied across diode becomes greater than the breakdown voltage, then the diode breaks down and very high current starts flowing in the circuit. There are generally two types of breakdowns in a diode: Zener breakdown Avalanche breakdown And based on the above classifications of breakdown of diode, we have the two […]
Tag: depletion region
Diode: Reverse Biasing
When the polarity of the external voltage source is opposite to the above case i.e. when positive terminal is connected to n-side and negative terminal to p-side, then diode is said to be reverse biased as shown below: When we reverse bias the diode, the majority carriers have again 3 types of forces acting on […]
Connecting both ends of Diode
Q- Would there be any current flow when we connect both ends of a diode and can we measure it using multimeter? Ans: Well when we connect both sides of a diode, it is actually the same case when we connect the n-type and p-type material at the junction. There would be diffusion of charges i.e. […]
Diode: Depletion region vs Doping
Q: How does the width of depletion region vary with change in doping of two regions? Ans: As we have already discussed how depletion region is formed and now we know that depletion region is formed when recombining of electrons and holes occur. We discuss different cases as follow: Doping of only p-type is greater: […]
Diode: Different Acting Forces
DIFFERENT FORCES ACTING ON CHARGE CARRIERS So we can say there are two types of forces that exit to the electrons of n-type and holes of p-type as shown: FE1 is force acting on electrons due to electric field. FE2 is force acting on holes due to electric field. Hence we call that there is barrier at […]
Making a Diode
Now we’ll see how the above described two types are used to manufacture a diode. We have the p-type and n-type semiconductors as follow: Now we combine the two types of materials as follow and we have to observe what would happen when we combine the two: When we combine the two types of material, […]