Practice Problem Statement (6.2) - Optoelectronic Devices and Applications
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Problem Statement

Practice - Problem Statement

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Practice Questions

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Question 1 Easy

What is a compound semiconductor?

💡 Hint: Think about which characteristics improve the generation of light.

Question 2 Easy

Why is silicon less efficient than compound semiconductors for light applications?

💡 Hint: Consider the bandgap type of both materials.

4 more questions available

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Question 1

Why are compound semiconductors preferred over silicon for light-based applications?

They are cheaper to produce.
They have direct bandgaps that allow efficient light emission.
They have a higher melting point.
They are easier to fabricate.

💡 Hint: Think about the structural differences in the semiconductors.

Question 2

True or False: Silicon has a direct bandgap.

True
False

💡 Hint: Recall the definitions of direct and indirect bandgaps.

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Challenge Problems

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Challenge 1 Hard

Discuss how the efficiency of LEDs might change if they were made from an indirect bandgap material. Provide examples.

💡 Hint: Consider what happens during recombination in indirect bandgap materials.

Challenge 2 Hard

Evaluate how alloying different elements in compound semiconductors can impact their applications in emerging technologies.

💡 Hint: Think about how different applications require different light wavelengths.

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