When the size of a semiconductor particle or crystal ________, the band gap energy ________.
A)decreases, decreases
B)decreases, remains the same
C)increases, increases
D)decreases, increases
E)decreases, goes to zero

Question

Quizplus · Accepted Answer

As the size of a semiconductor particle or crystal decreases, the band gap energy increases. This is because of the quantum confinement effect, which increases the density of energy states and causes the band gap to widen. As a result, the choices (A), (B), and (E) are incorrect. The choice (C) is also incorrect as the statement contradicts the basic principle of quantum confinement.

When the Size of a Semiconductor Particle or Crystal ________