Semiconductors are characterized by an electronic band structure in which the highest-occupied energy band, called the valence band (VB), and the lowest-occupied energy band, called the conduction band (CB), are separated by a bandgap, that is, a region of forbidden energies (Liqiang et al., 2006). In recent years, semiconductor nanostructures have gained interest due to their applications in various fields including solar cells, laser technology, light-emitting diodes, nanoscale electronic devices, components of armor, parts of automobiles, superabsorbents, packaging films, catalysis, and biosensors. Semiconductor nanocrystals such as silicon and germanium belong to group IV; gallium nitride (GaN), gallium phosphide (GaP), gallium arsenide (GaAs), indium phosphide (InP), and indium arsenide (InAs) belong to group III-V, while zinc oxide (ZnO), zinc sulfide (ZnS), cadmium sulfide (CdS), cadmium selenide (CdSe) and cadmium telluride (CdTe) belong to group II-VI of the periodic table (Suresh, 2013).Among the semiconductors, selenium (Se) is an attractive material with intriguing physical and chemical properties. It has photoconductive features with