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Chapter 18: Problem 22

Is it possible for compound semiconductors to exhibit intrinsic behavior? Explain your answer.

Short Answer

Expert verified
Answer: Yes, compound semiconductors can exhibit intrinsic behavior when they are in their pure form without any impurities or dopants. However, achieving a perfect intrinsic state can be challenging due to factors such as defects and unintentional impurities during the synthesis process.

Step by step solution

01

Understand intrinsic behavior

Intrinsic behavior in semiconductors refers to the properties of a semiconductor material when it is in its pure form, without any impurities or dopants. In this state, the number of electrons in the conduction band is equal to the number of holes in the valence band, and the material has a specific resistivity and energy bandgap.
02

Discuss types of semiconductors

There are primarily two types of semiconductors: elemental and compound semiconductors. Elemental semiconductors, such as silicon (Si) and germanium (Ge), are made of a single type of element. On the other hand, compound semiconductors are formed by combining two or more different elements from the periodic table, such as gallium arsenide (GaAs) or cadmium telluride (CdTe).
03

Intrinsic behavior in compound semiconductors

Compound semiconductors can also exhibit intrinsic behavior, similar to elemental semiconductors. This occurs when the compound semiconductor is in its pure form, with no dopants or impurities present, and the number of electrons in the conduction band equals the number of holes in the valence band.
04

Factors affecting intrinsic behavior

The intrinsic properties of compound semiconductors are influenced by factors such as temperature, the energy bandgap of the constituent materials, and their lattice structures. However, achieving a perfect intrinsic state in compound semiconductors can be challenging due to the presence of defects and unintentional impurities during the synthesis process.
05

Conclusion

Yes, it is possible for compound semiconductors to exhibit intrinsic behavior when they are in their pure form without any impurities or dopants. However, achieving a perfect intrinsic state can be challenging due to factors such as defects and unintentional impurities during the synthesis process.

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Most popular questions from this chapter

Briefly describe electron and hole motions in a \(p-n\) junction for forward and reverse biases; then explain how these lead to rectification.

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A hypothetical metal is known to have an electrical resistivity of \(3.3 \times 10^{-8}(\Omega \cdot \mathrm{m}) .\) A current of \(25 \mathrm{~A}\) is passed through a specimen of this metal \(15 \mathrm{~mm}\) thick. When a magnetic field of \(0.95\) tesla is simultaneously imposed in a direction perpendicular to that of the current, a Hall voltage of \(-2.4 \times 10^{-7} \mathrm{~V}\) is measured. Compute the following: (a) the electron mobility for this metal (b) the number of free electrons per cubic meter

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