Absorption properties and Quantum Confinement of colloidal CdSe quantum dots
DOI:
https://doi.org/10.51316/jca.2021.103Abstract
We investigate the structural and optical properties of CdSe QDs synthesized by the hot-injection technique. High-resolution transmission electron microscopy (HRTEM) analysis reveal the size-dependent of the CdSe QDs. The first through fourth excited states determined from absorption measurements are compared with calculated quantum size levels in s- and p-symmetry. In particular, featureless absorption peaks of the second and third excited states from the first exciton appear in the differential absorption (DA) spectra. These measurements with quantitative analysis enable the estimate error to be derived from anisotropic properties caused by the crystal field.Downloads
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