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What effect do added impurities have on semiconductor conductivity?
Wiki User
∙ 12y ago
It is called as DOPING. Doping is the process in which you add an impurity to a pure semiconductor to increase its conductivity. While doping is done, crystal structure of semiconductor is not disturbed.
Wiki User
∙ 15y ago
Wiki User
∙ 10y agoThe atoms of the main semiconductor material - usually silicium or germanium - have 4 electrons in the outer shell. The impurities added have 5 electrons in their outer shell for an n-type semiconductor (for example, arsenic), or 3 electrons for a p-type semiconductor (for example, boron).
Wiki User
∙ 10y agoIt becomes an n-type semiconductor with electrons as majority carriers because pentavalent impurities have an extra electron (valence elecron)
Wiki User
∙ 11y agothe impurity itself is known as the "dopant"
the process is known as "doping"
Wiki User
∙ 15y agodoping
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What is an intrinsic semiconductor and what is an extrinsic semiconductor?
intrinsic semiconductor is an un-doped semiconductor, in which there is no impurities added where as extrinsic semiconductor is a doped semiconductor, which has impurities in it. Doping is a process, involving adding dopant atoms to the intrinsic semiconductor, there by gives different electrical characteristics
Does semiconductor lasers and laser diodes are similar?
Semiconductor lasers are made with laser diodes, with added circuitry to measure and regulate the diode current/output.
What is extrinsic conductor?
Impure semi conductor material are called extrinsic semi conductor as there a small quantity of foreign particle is present. Two types of impurities are added to an extrinsic semi conductor. When impurities belonging to third group are called as trivalent or acceptor impurities such as boron, aluminum, indium or gallium when these impurities are added in pure semi conductors they form p-type semi conductor. And similarly when impurities belonging to group fifth called as penta valent or donor impurities such as arsenic, antimony, bismuth or phosphorus are added to a semi conductor they form N-type semi conductor .
Small quantities of material added to semiconductor to increase electrical conduction?
are called dopants
What is the Difference between n type and p type semiconductor?
The difference between the p-type and the n-type semiconductor is that the p-type semiconductor has more holes than electrons while the n-type semiconductor has more electrons than holes.
Diffrentiate n-type and p-type?
When pentavalent impurity is added to pure semiconductor, it is known as N-Type semiconductor. In N-type semiconductor electrons are majority carriers where as holes are minority carriers. impurities such as Arsenic, antimony are added. When trivalent impurity is added to pure semiconductor, it is know as P-type semiconductor. In P-type semiconductor holes are majority carriers whereas electrons are minority carriers. Impurities such as indium, galium are added.
Why suitable impurities are added to semiconductor depending upon its use?
The idea is that, depending on the impurities added, the semiconductor will be of one of two different types: * n-type, where the current is conducted by electrons, and * p-type, where the current is conducted by holes.
What is doping in conductor?
The process of adding suitable impurities in the intrinsic semiconductor is called doping. The impurity added to the intrinsic semiconductor to increase its conductivity is called dopant. There are some methods of doping in case of a conductor.impurity atoms can be added to the intrinsic semiconductor in different ways discussed below:A very small quantity of impurity atoms is made by diffusing into the high purity molten material such as germanium when the crystal is grown out of melt.Impurity atoms can also be added into the intrinsic semiconductor by heating it in the environment having impurity atoms.Impurity atoms can also be added into the intrinsic semiconductor by bombarding it with the impurity atoms.
Can silicon conduct heat?
Pure silicon's resistance is quite high.It is an extremely important semiconductor;it is doped with boron, phosphorus, or arsenic,to increase its conductivity, it is used in various electronic circuit and switching devices, including computer chips, transistors, and diodes. .In fact ,silicon is nonmetallic to semimetallic chemical element,
How many valance electrons does a semiconductor have?
It is not the number of valence electrons that an insulator has that is important. It is the way the valence electrons are "arranged" in the structure of the material that matters. If not all the valence electrons of a substance are "involved" in the structure of the material, then these electrons are said to be free electrons. They move about in the substance, and are free to contribute to electron flow. The metals are examples. In contrast with this, if all the electrons are bound up in a material, they are not free to support current flow, and the material is said to be an insulator. Said another way, if the valence electrons in a material are in a Fermi energy level that overlaps the conduction band for that material, the material is a conductor. In an insulator, the valence electrons are all in Fermi energy levels that are below the conduction band for that material, and it is an insulator. Applying a voltage to an insulator will not "lift" the valence electrons up into the conduction band to allow them to support current flow.
What is an intrinsic semiconductor and what is an extrinsic semiconductor?
intrinsic semiconductor is an un-doped semiconductor, in which there is no impurities added where as extrinsic semiconductor is a doped semiconductor, which has impurities in it. Doping is a process, involving adding dopant atoms to the intrinsic semiconductor, there by gives different electrical characteristics
Will there be effect on melting or boiling point of a substance if another substance is added to it?
Yes, impurities have important effects on the melting and boiling point of materials.
Why is croylite added to aluminium?
To help remove impurities.
Why is limestone added to the blast furnace during the extraction of iron?
Iron ore contains the impurities sand and clay, which are silicon oxides. Limestone is added to remove these impurities.
What may happen to the boiling point of a substance if there are impurities present. Explain in terms of the nature of impurities.?
it might decrease or increase depends on the impurities added.:D
Which water requires the greatest amount of salt to float an egg?
There aren't different types of water (unless you count water with different levels of impurities, but in most cases the impurities will have the same effect as the salt, so it is just the purer water that needs more 'added' salt)
Which substance when added to water makes the solution a good conductor of electricity?
By increasing diameter of the wire , reducing length and using a wire of good quality , we can increase the conductivity.
