Machine-translated by Google. Questions are authored in English.
Top

Discussion

A semiconductor quantum dot fluoresces at a shorter wavelength as its size

  • A.decreases, the band gap widening
  • B.increases, the band gap widening
  • C.decreases, the band gap narrowing
  • D.increases, the band gap narrowing

Answer: A

Tighter confinement raises the gap, so a smaller dot emits bluer light and a larger one redder, from the very same material. Tuning the colour by size rather than by chemistry is the property that made such dots useful in displays.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.