1)When we remove electron from neutral atom the atom become ionized
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2)Conductivity of a semiconductor is

Where h and e correspond to hole and electrons
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3)Conductivity always a opposite property of resistivity
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4)So semiconductor conduction band is more energy than valance band
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5)Diffusion only occurs due to concentration gradient
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سؤال 1 The ionization energy is the energy necessary to remove an electron from the neutral...
Ionization energy (Ei) is the amount of energy required to remove an electron from a neutral gaseous atom or gaseous ion. Electrons are attracted to the positively charged nucleus; therefore removing an electron requires energy. The process is endothermic, and so ionization energies have a positive value. The first ionization energy (Ei1) is the energy associated with the removal of an electron from the neutral gaseous atom. The reaction is represented for the generalized atom X as X→X++e− The amount...
Taking pure silicon (Si) as an example, explain what is meant by the terms electron-hole generation and recombination, how they affect the electrical conductivity, and define what is meant by the "intrinsic carrier density", n. [5 marks] Q3. a) b) With the aid of both lattice and energy band diagrams, explain how n-type doping of Si is achieved and state two types of suitable dopant atoms. [7 marks] c) An n-type region on a Si wafer has a donor concentration...