Q4. a) With the aid of suitable labelled diagrams, describe the processes of carrier generation and recombination in a semiconductor. b) Explain what is mean by the "mobility" of carriers in a conducting material, why electron mobilities are higher for electrons than holes, and why electron mobilities are higher in semiconductors like silicon than in a highly conducing metal like copper. c) Explain how the electrical conductivity of a material depends on the free carrier density and carrier mobility, and hence describe and explain the differences in the temperature dependences of the conductivity of an intrinsic semiconductor (e.g. pure silicon) compared with a good metal (e.g. copper).

Q4. a) With the aid of suitable labelled diagrams, describe the processes of carrier generation and recombination in a semiconductor. b) Explain what is mean by the "mobility" of carriers in a conducting material, why electron mobilities are higher for electrons than holes, and why electron mobilities are higher in semiconductors like silicon than in a highly conducing metal like copper. c) Explain how the electrical conductivity of a material depends on the free carrier density and carrier mobility, and hence describe and explain the differences in the temperature dependences of the conductivity of an intrinsic semiconductor (e.g. pure silicon) compared with a good metal (e.g. copper).

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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