Compound semiconductors

Which is a typical material for high-brightness red to yellow LEDs?

  1. ASilicon
  2. BAlGaInP-based materials
  3. CDiamond
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Answer: B. AlGaInP-based materials

AlGaInP-based compound semiconductors emit red to yellow light efficiently depending on composition. They are used in traffic signals, car tail lights and displays. InGaN-based materials are used for blue and green.

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More Compound semiconductors questions

  1. Which correctly describes the quantum well structure used in the light-emitting layers of semiconductor lasers and LEDs?
  2. Which is a characteristic of a VCSEL (vertical-cavity surface-emitting laser)?
  3. Why is care needed when handling GaAs wafer processing debris and waste?
  4. Why is GaN well suited to high-frequency, high-power transistors?
  5. What is one main reason SiC is used as the substrate for GaN HEMTs?