what is ment by dopping?
why it is necessary?
Answers
Answer:
hey !!
Explanation:
the introduction of impurities into a semiconductor crystal to the defined modification of conductivity. Two of the most important materials silicon can be doped with, are boron (3 valence electrons = 3-valent) and phosphorus (5 valence electrons = 5-valent). Other materials are aluminum, indium (3-valent) and arsenic, antimony (5-valent).
The dopant is integrated into the lattice structure of the semiconductor crystal, the number of outer electrons define the type of doping. Elements with 3 valence electrons are used for p-type doping, 5-valued elements for n-doping. The conductivity of a deliberately contaminated silicon crystal can be increased by a factor of 106.
#necessary because
For making the semiconductors conduct there must be some vacant electrons. Doping is the process of adding impurities to the pure form of semiconductor. ... The free electron or the holes are responsible for conduction. For making the semiconductor conducting doping is necessary.
Answer:
Explanation:
the use of a substance (such as an anabolic steroid or erythropoietin) or technique (such as blood doping) to illegally improve athletic performance.
Because the band gap is so small for semiconductors, doping with small amounts of impurities can dramatically increase the conductivity of the material. Doping, therefore, allows scientists to exploit the properties of sets of elements referred to as “dopants” in order to modulate the conductivity of a semiconductor.