Which of the following is an N-type semiconductor?
Ge(Group 14) doped with As(Group 15) is an n-type semiconductor.
What is the example of N-type semiconductor?
The n-type semiconductor examples are Sb, P, Bi, and As. These materials include five electrons in their outer shell. The four electrons will make covalent bonds using the adjacent atoms and the fifth electron will be accessible like a current carrier. So that impurity atom is called a donor atom.
What are the applications of P and N semiconductors?
Diode is a combination of n-type and p-type semiconductors extensively used as a rectifier. Transistors are manufactured by keeping a layer of one type of semiconductor between two layers of another type of semiconductor. npn and pnp type of transistors are used to detect or amplify radio or audio signals.
What are the two types of semiconductors?
In this way two types of semiconductor are available: Electrons are negatively charged carriers.
- N-type: An N-type semiconductor material has an excess of electrons.
- P-type: In a P-type semiconductor material there is a shortage of electrons, i.e. there are ‘holes’ in the crystal lattice.
How many semiconductors are there?
Table of semiconductor materials
| Group | Elem. | Band gap (eV) |
|---|---|---|
| VI | 1 | 2.05 |
| VI | 1 | 0.33 |
| III-V | 2 | 6.36 |
| III-V | 2 | 5.96 |
Why gold is used in semiconductor?
The gold solders have better thermal conductivity than tin or lead based solders and they also have higher melting temperatures than the lead-free alloys. Thermal fatigue can also be a problem in power semiconductor components. Gold tin solder is also used to hermetically seal some types of packaging.
How much gold is in a old computer?
Some other sources estimate that your average computer contains about 1/5th of a gram, or about $12 worth, of gold in them. Laptops, on the other hand, typically contain about 1/10th of a gram of gold, or around $6 worth.
Why gold is not used as a conductor?
Copper and silver are superior conductors to gold, having less resistance. Gold’s lack of oxidation is what makes it useful as a contact material. But for wires, enclosed in insulation, copper’s cost, availability, and conductivity make it a better medium. Tinning the exposed ends can reduce oxidation.
Can pure gold be used for making electrical wires?
Answer. Gold is not used for making electric wires because it is too rare, and too costlier than Copper. Silver and copper are used for making wires. So, Gold (Au) is not used for making electric wires.