When the size of a semiconductor particle or crystal decreases,the band gap energy ________.
A)decreases
B)remains the same
C)increases
D)becomes 1
E)goes to zero

Question

Quizplus · Accepted Answer

As the size of a semiconductor particle or crystal decreases, the number of atoms on the surface increases relative to those in the bulk. This surface energy leads to an increase in the conduction band energy and a decrease in the valence band energy, resulting in an increase in band gap energy. Therefore, the band gap energy increases when the size of the semiconductor particle or crystal decreases.

When the Size of a Semiconductor Particle or Crystal Decreases,the