Chapter 18: Problem 36
Compare the temperature dependence of the conductivity for metals and intrinsic semiconductors. Briefly explain the difference in behavior.
Chapter 18: Problem 36
Compare the temperature dependence of the conductivity for metals and intrinsic semiconductors. Briefly explain the difference in behavior.
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Get started for free(a) Compute the electrical conductivity of a \(7.0-\mathrm{mm}(0.28 \text { -in. })\) diameter cylindrical sil icon specimen \(57 \mathrm{mm}(2.25\) in.) long in which a current of 0.25 A passes in an axial direction. A voltage of \(24 \mathrm{V}\) is measured across two probes that are separated by \(45 \mathrm{mm}(1.75 \text { in. })\) (b) Compute the resistance over the entire \(57 \mathrm{mm}(2.25 \text { in. })\) of the specimen.
Will each of the following elements act as a donor or an acceptor when added to the indicated semiconducting material? Assume that the impurity elements are substitutional.$$\begin{array}{cc} \hline \text {Impurity} & \text {Semiconductor} \\ \hline \mathrm{N} & \mathrm{Si} \\ \mathrm{B} & \mathrm{Ge} \\ \mathrm{S} & \mathrm{InSb} \\ \mathrm{In} & \mathrm{CdS} \\ \mathrm{As} & \mathrm{ZnTe} \\ \hline \end{array}$$
(a) Explain why no hole is generated by the electron excitation involving a donor impurity atom. (b) Explain why no free electron is generated by the electron excitation involving an acceptor impurity atom.
Briefly describe electron and hole motions in a \(p-n\) junction for forward and reverse biases; then explain how these lead to rectification.
How does the clectron structure of an isolated atom differ from that of a solid material?
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