0
A semiconductor is a material that has electrical conductivity between a conductor and an insulator. It can be altered by adding impurities or applying electrical fields to control the flow of current. Semiconductors are vital components in electronics, such as transistors, diodes, and integrated circuits.
What else can I help you with?
What are the semiconduter elements in periodic table?
Mostly Silicon and Germanium.
Which is a better semiconductor silicon or germanium?
silcon is a better semiconduter since,it has great applications like in making of nanowires which only can be made from silion.as, silicon is just after the carbon it exibit it's great property of catenation and can be made into tubes which can't be done with germanium so, in this way we can say that besides exibiting basic semiconducter properties silicon can show other useful properties too
What are the properties of semiconduter?
The properties are controlled by a "forbidden energy zone (known as the Band Gap" so that at low temperatures electrons from the constituent atoms do not have enough energy to populate available energy states above it (the "conduction band"). So there's no conduction there. They remain in an energy band closely associated with the parent atoms (the "valence band"), and since all the states are occupied, there's no conduction there either. By raising the temperature, electrons can be thermally excited from this lower state ("valence band") to the conduction band. So the conductivity is extremely dependent on temperature. By introducing small numbers of different atoms ("dopants") which have one more electron in their electronic structure ("donors") the extra electron which does not take part in the bonding is readily re-excited, with little added energy, into the conduction band. The semiconductor is then said to be "n-type". Equally, if a dopant is included which has one electron short to comply with the bonding arrangements, the is a "hole" in the valence band, and an electron hopping into this hole from a neighbouring atom, makes it seem like the hole has moved. Such a material is said to be "p type". All sorts of electronic devices, starting with diodes and transistors can be engineered by joining together pieces of p and n type material. For example a simple "junction" can be electrically biassed so that the electrons from the n type and the holes from the p type are pushed towards each other so they recombine (the electron drops into the space represented by the hole. This is called "forward bias of the diode". Reverse the bias polarity and the electrons and holes are pulled away from each other so eventually no current can flow ("reverse bias"), and the transient movement behaves like a capacitor. More complicated structures make transistors. And ever more complicated variations are possible.
