Compound semiconductors

Which elements make up gallium arsenide (GaAs)?

  1. AGallium (group III) and sulfur (group VI)
  2. BGallium (group III) and arsenic (group V)
  3. CGermanium (group IV) and arsenic (group V)
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Answer: B. Gallium (group III) and arsenic (group V)

GaAs is a compound semiconductor in which gallium (Ga) from group III and arsenic (As) from group V bond in a one-to-one ratio. Being a group III and group V combination, it is classified as a III-V compound semiconductor.

  • A. As is arsenic, not sulfur (S).
  • B. Correct. Ga from group III and As from group V.
  • C. Germanium's symbol is Ge; it is not in GaAs.
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More Compound semiconductors questions

  1. Why is LED lighting more energy-efficient than incandescent bulbs?
  2. Which compound semiconductor, with very high electron mobility, is used in magnetic sensors (Hall elements) and the like?
  3. What is the gate structure of the MESFET, long used as a high-frequency GaAs transistor?
  4. Which material, named for its crystal structure, has attracted intense research as a high-efficiency solar cell material that can be made by low-temperature processes such as coating?
  5. In LEDs with an InGaN emitting layer, how does the emission color change when the indium (In) fraction is increased?