Question

How are n-type and p-type semiconductors formed give one example in each case?

Answer 1

I think this will help you

Answer 2

n-type and p-type semiconductors are formed by the process of doping the pure crystals like Silicon, Germanium , etc., with pentavalent and trivalent elements.

Explanation:

• Extrinsic Semiconductors are the type of conductors produced by the process called doping
• Doping is a process of adding impurity to an extremely pure substances such as crystals.
• There are two types of Extrinsic semiconductors are formed by doping
• They are P-type and n-type semiconductor
• n-type semiconductors are formed by adding impurities in pure crystals like Silicon (Si) and Germanium (Ge) with pentavalent elements like Arsenic, Antimony, Phosphorous,etc.,
• When pentavalent atom doped with Si , four atoms from pentavalent atom will paired with silicon and one remains loosely bound with the parent atom.
• Also the Silicon atoms free some electrons and produce holes when the temperature increases. When recombination occurs, the holes will decrease in number
• in n-type semiconductor, number of holes are lesser than number of electrons present in it
• Therefore electrons are the majority charge carriers and is named as n-type semiconductors, where "n" stands for negative
• p-type semiconductors are produced by doping pure semiconductors like Silicon and Germanium with trivalent elements like Indium, Boron, Aluminium, etc.,
• When a trivalent element bond with Si, three electrons of SI and trivalent element get bonded and and for 4th Si atom there is no electron to bond with.
• A hole or vacuum is formed and they are also ready for conduction process
• In p-type, the majority charge carriers are holes and the holes are greater in number than electrons

To learn more ...

1.  https://brainly.in/question/10455221

2.  https://brainly.in/question/12435277