Bandgap of semiconducting materials can be changed by changing their particle sizes. true or false?
Answers
Statement is true, that the bandgap of semiconducting materials can be changed by changing their particle sizes.
The spacing among the electronic levels and the bandgap result, due to the decrease in the size of particles.
In addition to which, oscillator strength also increases simultaneously. All are related. All that happens with the overlapping of the wave functions.
The statement that the bandgap of semiconducting materials can be changed by changing their particle sizes is true.
The nanoparticles in the semi-conductor have a very small number of atoms and molecules.
Consequently, the number of overlapping energy orbitals or levels decreases, leading to a decrease in the band width and widened distance between two bands.
Thus, by decreasing the size of the particles into smaller number of atoms, we can increase the bandgap.