Synthesis and optical properties of Cd1−xNdxSe (0 ≤ x ≤ 0.09) nanocrystalline quantum dots prepared via 6-mercaptopurine assisted wet chemical route for optoelectronic devices.

Nanocrystalline semiconducting quantum dots have drawn paramount attention as efficient materials for the next-generation optoelectronic devices owing to their multiple generations of excitons, tunable optical band gap and high absorption coefficient. For improving the optical, luminescence and electronic characteristics of quantum dots, Cd 1− x Nd x Se (0 ≤ x ≤ 0.09) nanocrystalline QDs were successfully synthesized via 6-mercaptopurine assisted wet chemical approach for the first time. The morphological shapes and crystal structures of the developed nanocrystals were characterized by transmission electron microscope and X-ray diffractions. However, the impact of Nd ions on the optical behavior, the optical band gap, and the valence band and the conduction band levels of the Cd 1− x Nd x Se (0 ≤ x ≤ 0.09) nanocrystalline QDs were evaluated. The luminescence, quantum efficiency as well as quantum yield were studied. A remarkable enhancement of the luminescent emission and narrow band emission was achieved. The quantum yield enhanced from 35% to 91%. Such unique demeanor embark the opportunity to use these novel series of Cd 1− x Nd x Se (0 ≤ x ≤ 0.09) nanocrystalline QDs as efficient materials for quantum dot sensitized solar cells as well as light emitting devices with high quality. [ABSTRACT FROM AUTHOR]