Explanation has to be given for why Phosphorus or gallium doped silicon exhibits higher electrical conductivity than the pure silicon. Concept introduction: In semiconductors the energy gap between the valence and conduction band is of medium level between that of conductors and insulators. The energy gap is high as that of conductors and low as that of insulators. Semi-conductors are of two distinct types: p-type and n-type, formed by imparting impurities which is nothing but elements other than the one which act as semi-conductor. This phenomenon of imparting impurities is called as “doping”.

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Identifying electron-donating and electron-withdrawing effects For each of the substituted benzene molecules below, determine the inductive and resonance effects the substituent will have on the benzene ring, as well as the overall electron-density of the ring compared to unsubstituted benzene. Molecule Inductive Effects Resonance Effects Overall Electron-Density CF3 O donating O donating O electron-rich O withdrawing withdrawing O no inductive effects O no resonance effects O electron-deficient O similar to benzene OCH3 Explanation Check O donating O donating ○ withdrawing withdrawing O no inductive effects no resonance effects electron-rich electron-deficient O similar to benzene Х © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center

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Chapter 10, Problem 65E

Interpretation Introduction

Interpretation:

                 Explanation has to be given for why Phosphorus or gallium doped silicon exhibits higher electrical conductivity than the pure silicon.

Concept introduction:

                In semiconductors the energy gap between the valence and conduction band is of medium level between that of conductors and insulators. The energy gap is high as that of conductors and low as that of insulators.

               Semi-conductors are of two distinct types: p-type and n-type, formed by imparting impurities which is nothing but elements other than the one which act as semi-conductor. This phenomenon of imparting impurities is called as “doping”.

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