Log in Priyanshu 6 years agoPosted 6 years ago. Direct link to Priyanshu's post “How number of holes large...” How number of holes larger than number of electron , when number of B much less compare to Si and one hole create by one B ? • (2 votes) mahesh 6 years agoPosted 6 years ago. Direct link to mahesh's post “Whenever an electron from...” From the author:Whenever an electron from Si-Si covalent bond breaks free, we get 1 hole and 1 free electron. But with the introduction of Boron, we are getting holes without any free electrons. This is why the number of holes increases with the addition of B. (15 votes) Hafsa Mahmood 5 years agoPosted 5 years ago. Direct link to Hafsa Mahmood's post “Why should the semi condu...” Why should the semi conductor flow charge in on direction? • (2 votes) Daniel Hemansen 4 years agoPosted 4 years ago. Direct link to Daniel Hemansen's post “watch the videos "The PN ...” watch the videos "The PN junction" and "PN junction biasing" (1 vote) Hira Akram 4 years agoPosted 4 years ago. Direct link to Hira Akram's post “Why electrons jump into a...” Why electrons jump into acceptor level instead the fact that accepter level lies in the forbidden region? • (1 vote) Daniel Hemansen 4 years agoPosted 4 years ago. Direct link to Daniel Hemansen's post “The forbidden region is o...” The forbidden region is only for silicon. Boron has its own diagram. the acceptor level is an energi level for boron not silicon. (3 votes) Philippos 5 years agoPosted 5 years ago. Direct link to Philippos's post “So, it is right to say th...” So, it is right to say that the holes roam only between Si atoms? I mean, in order to have a hole created (due to the doping per se, and not due to thermal fluctuations), we need an electron jump to the acceptor's energy level. Which means that all B atoms will have their outer shells complete and holes will exist only in Si atoms (i.e., in the valence band). Is the above reasoning correct? • (2 votes) Daniel Hemansen 4 years agoPosted 4 years ago. Direct link to Daniel Hemansen's post “correct if you have the r...” correct if you have the right energi. The Boron (0 votes) 😊 how are P-type & N-type semiconductors made? Explain with the help of diagram the forward and reverse biasing of PN junction? • (1 vote) Abhi 2 years agoPosted 2 years ago. Direct link to Abhi's post “These are made by doping ...” These are made by doping of various trivalent(in P type semiconductors) elements and pentavalent (for n type semiconductors) elements. For further explanation with diagram refer to next lessons on semiconductors (1 vote) Abhi 2 years agoPosted 2 years ago. Direct link to Abhi's post “No of holes increased in ...” No of holes increased in valence band but it is conduction band which is responsible for movement of free charge carriers. so how holes can move in valence band and produce current? • (1 vote) Ilya Kulakov 3 years agoPosted 3 years ago. Direct link to Ilya Kulakov's post “To be specific, what is t...” To be specific, what is the ratio of Si atoms to B atoms in a typical P-type semiconductor? If it's <=1 why do we care for holes being on the valence band of Si atoms and not volume of overall vacancy in the resulting material? • (1 vote) vaxshgadd 9 months agoPosted 9 months ago. Direct link to vaxshgadd's post “In the p-type semiconduct...” In the p-type semiconductors the holes are created in the Valence Band, not the conduction band. So how do they become better at conducting? • (1 vote) Daniel Hemansen 4 years agoPosted 4 years ago. Direct link to Daniel Hemansen's post “P and N-type. what will h...” P and N-type. what will happen when you have a temperature difference in the semiconductor itself. how will the charges flow? • (1 vote)Want to join the conversation?
Where one B + Si = 3+4 electron and only 1 hole .
s energi level is a bit higher then the silicons valence energi level so you need some kinde of energi to get the electrones to migrat to the borons energi level
FAQs
What is P-type extrinsic semiconductor? ›
P-type semiconductors are created by doping an intrinsic semiconductor with an electron acceptor element during manufacture. The term p-type refers to the positive charge of a hole. As opposed to n-type semiconductors, p-type semiconductors have a larger hole concentration than electron concentration.
What is the difference between a N-type and a P-type extrinsic semiconductor? ›In the case of N-type semiconductor, the majority of charge carriers move from low potential to high potential. In the case of a P-type semiconductor, the majority of charge carriers move from high potential to low potential. The donor energy level is close to the conduction band in the case of N-type semiconductors.
How do you obtain p-type semiconductor? ›To make a p-type semiconductor, extra materials like boron or aluminum are added to the silicon. These materials have only three electrons in their outer shell. When the extra material replaces some of the silicon it leaves a hole where the fourth electron would have been if the semiconductor was pure silicon.
What is the p-type semiconductor theory? ›A p-type semiconductor is an intrinsic semiconductor doped with boron or indium. The majority of carriers in p-type semiconductors are holes. Electrons are minority carriers in a p-type semiconductor. In a p-type semiconductor, the hole density is much greater than the electron density.
What are the two types of extrinsic semiconductors? ›Extrinsic semiconductors are further classified into two types - N-Type semiconductors and P-type semiconductors.
What is p-type semiconductor In simple words? ›A p-type semiconductor is an intrinsic semiconductor doped with boron (B) or indium (In). Silicon of Group IV has four valence electrons and boron of Group III has three valence electrons.
Which is better P or N-type semiconductor? ›N-type semiconductors have an abundance of free electrons, which contribute to their high conductivity. On the other hand, P-type semiconductors possess an excess of positively charged holes, resulting in a lower conductivity compared to N-type.
How do you tell if a semiconductor is N type or P-type? ›The difference between N-type and P-type semiconductors is the primary material used to create the chemical reaction during doping. Depending on the material used, the outer orbital will have either five or three electrons making one negatively charged (N-type) and one positively charged (P-type).
What is the majority carrier In a p-type semiconductor? ›In a p- type semiconductor, the majority charge carriers are the holes whereas in the n- type semiconductor, the majority charge carriers are the free electrons.
How many types of p-type semiconductor are there? ›Ans:- Some p-type semiconductor examples are- boron-doped silicon, aluminium-doped silicon,boron-doped Germanium, etc. Ans:- The types of Extrinsic semiconductors are- p-type and n-type semiconductors.
How do you combine p-type and N-type semiconductors? ›
For creating a p−n junction, we take one slab of p-type semiconductor and physically join it to another n-type semiconductor. continuous contact at the atomic level is necessary. two macroscopic smooth flat slabs can be used.
Why is p-type semiconductor called acceptor? ›P-type semiconductors are doped with acceptor atoms. Acceptor atoms have one less electron in their valence shell that the atom that they replace in the crystal. Acceptor atoms are ionized in a p-type semiconductor enabling the missing electron (“hole”) to freely propagate throughout the crystal.
What are the two basic forms of semiconductor are the p-type and the type? ›Semiconductors doped with donor impurities are called n-type, while those doped with acceptor impurities are known as p-type. The n and p type designations indicate which charge carrier acts as the material's majority carrier.
Why is p-type semiconductor formed? ›P-type semiconductors are a fundamental building block of modern electronics. They are created by introducing specific impurities, called acceptor dopants, into the crystal structure of an intrinsic semiconductor.
What is the type of extrinsic semiconductor? ›Extrinsic semiconductors can be further classified into two kinds: P-type semiconductor. N-type semiconductor.
Is P-type extrinsic semiconductor positively charged? ›So, the holes are created for this condition to take place but the semiconductor is electrically neutral because the number of the electrons and holes are same in magnitude and opposite in sign. Hence a p-type semiconductor is electrically neutral that is uncharged.
What is meant by N-type and P-type extrinsic silicon semiconductors? ›In n-type silicon, the electrons have a negative charge, hence the name n-type. In p-type silicon, the effect of a positive charge is created in the absence of an electron, hence the name p-type.
What is meant by intrinsic and extrinsic semiconductors how a p-type semiconductor is formed? ›The main difference between intrinsic and extrinsic semiconductors is that intrinsic semiconductors are pure semiconducting materials without any intentional doping, while extrinsic semiconductors are intentionally doped to modify their electrical properties.