Various Quantum Mechanical Concepts for Confinements in Semiconductor Nanocrystals

Semiconductor nanocrystals or quantum dots (QDs) are nanometer-scale materials which have attracted the attention of researchers in various branches of science and technology because of their peculiar characteristics as compared to their bulk counterpart. Optical, electronic and optoelectronic properties of semiconductors are greatly influenced when the crystallite size is in the quantum confinement regime. Various quantum mechanical concepts are being used to predict the quantum confinement regime. Here, an attempt has been made to compare and evaluate the consistency of various concepts.