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A semiconductor of silicon doped with a pentavalent impurity expected to be an n-type semiconductor.
When you dope a silicon semiconductor with pentavalent impurity the extra electron from the pentavalent compound remains free while others 4 form the covalent bonding with neighboring atoms leaving one unpaired electron.
The extra electron remains in the higher energy state nearer to the conduction band, and, depending on the material, a small amount of energy can bring the electron to the conduction band and hence electron acts as the carrier. Thus an n-type of semiconductor is formed.
What else can I help you with?
What is the effect of temperature on hall coefficient of a lightly doped semiconductor?
hall coefficient of a lightly doped semiconductor will decrease with increase in temp as hall coefficient is inversely proportional to number density of charge carriers.
What are the functions of pnp?
In what sense? In transistor jargon, p stands for positively doped type and n for negatively doped semiconductor. Another terminology used in mobile games is Pass 'n play.
What is the semiconductor junction diode?
A single crystal of semiconductor material, part doped with N type impurities and part doped with P type impurities, with the N and P types meeting at a single junction. This junction conducts only when forward biased. Such a diode may be an independent discrete component or it may be part of an integrated circuit (in which case the entire integrated circuit is the single crystal).
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
What are the advantages of using doped semiconductor rather than pure semiconductor?
Doped semiconductors have enhanced electrical properties compared to pure semiconductors, primarily due to the introduction of impurity atoms that create free charge carriers. This doping process increases conductivity, allowing for better control over the material's electrical characteristics, which is crucial for devices like transistors and diodes. Additionally, doped semiconductors enable the formation of p-n junctions essential for various electronic applications, enhancing performance in integrated circuits and photovoltaic cells. Overall, doping allows for tailored electrical behavior, improving efficiency and functionality in semiconductor devices.
Explain why arsenic-doped silicon conducts electric current better than pure silicon?
Pure silicon is intrinsic. It has a high resitivity which means it is a poor conductor of electricity in this state. The dopant that is introduced during the doping process can be arsenic, boron or phosphorous. These are the traditional choices to dope the intrinsically pure silicon. After the pure silicon becomes doped its electrical properties change. The main change is it has a lower resistivity and will conduct electricity. This is why silicon is called a semiconductor.
When silicon is doped with phosphorous what type of semiconductor results?
it would be a n-type semiconductor because phosphorus has more valence electrons than silicon does.
In electronics what is a wafer of semiconductor material processed to form a type of integrated circuit is?
Silicon which is then doped accordingly.
What are the examples of p-type semiconductors?
Examples of p-type semiconductors include materials like boron-doped silicon, gallium arsenide, and aluminum gallium arsenide. These materials have a deficiency of electrons, leading to "holes" in the crystal lattice that behave as positive charges.
What is conductivity of n type semiconductor?
What's the silicon doped with? Antimony? Arsenic? Phosphrus? And, much more importantly, how heavily is the silicon doped? Are there 1020 electrons per meter-3 or is 1025 electrons per meter-3 more the order of the day? Graphite is used as a conductor in some electrochemical cells. Processed and compressed graphite is used as brush material in electric motors. Without more information, the best answer that can be offered is a bit general. What is the electrical conductivity of n-type silicon graphite? Pretty good.
What are arsenic doped wafers used for?
Arsenic doped silicon wafers are used as the starting point for computer chips, memory chips, transistors, diodes, LEDs and many other devices. Arsenic is an n-type dopant in silicon, causing it to have an abundance of electrons (n for "negative"). A junction or diode is formed when an n-type region is in contact with a p-type region. A p-type region is formed with Boron for example as the dopant. Here there is a dearth of electrons (or equivalently an abundance of holes or absences of electrons). The holes act like positive carrier (p-type). The entire computer chip consists of lots of n and p regions that form circuits, transistors, etc. The wafer starts out arsenic doped, and then the various other dopants and additives are implanted or diffused into the surface. Then silicon dioxide is grown on top of the wafer which is insulating. Metal is desposited on top of that to create the wires interconnecting the various transistors on a chip. The wafer is diced up into the chips that get put in a package that you see on your computer board. You end up with an entire computer chip that started as an arsenic wafer.
Which serve as a donor impurity in silicon?
Common donor impurities in silicon include phosphorus and arsenic. These impurities have one more valence electron than silicon, making them donate an extra electron to the silicon crystal lattice, resulting in n-type doping.
Is germanium n type semiconductor?
Yes, germanium can be doped to become an n-type semiconductor by introducing donor impurities such as phosphorus or arsenic. This process increases the number of free electrons in the material, giving it an excess of negative charge carriers.
What results when phosphorus and si are combined?
phosphorus-doped silicon ( n-type semiconductor) can be be produced by adding phosphorus to silicon to obtain a mixture, then heating and melting the obtained mixture. Or add phosphorus to already melted silicon.
Why is pure silicon deliberately made impure again when it is used to make computer chips?
Silicon is essentially an insulator when pure. When generating wells or electron barriers, silicon is Doped with Boron, Phosphorus and Arsenic. The details of how this works can be found in numerous books on IC manufacturing.
What is intrinsic scmicondoctor?
A completely pure semiconductor crystal is called intrinsic, to underline that no substance is inserted in the crystal as impurity. An intrinsic semiconductor has a very low conductivity (it is almost an insulator, even if a current can flow if it undergoes a great voltage difference. Selected intrinsic semiconductors like Indium Phosphate (InP) or Gallium Arsenide (GaAs) are instead very effective in creating photo-stimulated electrical current (that is electrical current due to absorption of incident light) at a specific frequency called resonance frequency of the semiconductor. Other semiconductors (like Silicon, Si) lack this capability. This difference is related to the quantum mechanical behaviour of electrons in the different crystals. A semiconductor crystal where selected substances called dopants (like phosphorous or arsenic) are inserted in the crystal to give it particular properties is called doped semiconductor. Doping is more frequently used to create free charges in the semiconductor and increase conductivity. Depending on the sign of the virtual particle generated by doping in the crystal the doped semiconductor is called p doped (positive carrier generated) or n doped (negative carrier generated).
What is a N-type material?
An N-type material is a type of semiconductor where silicon or germanium is doped with impurities such as phosphorus or arsenic to introduce free electrons into the material. These extra electrons give the material a negative electron charge, hence the "N" designation. N-type materials are commonly used in electronic devices like transistors and diodes.
