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Exciton Energy of CdS Quantum Dots
Essay specific features
Written by:
Ruth C
Date added:
October 12, 2016
Level:
University
Grade:
A
No of pages / words:
12 / 3215
Was viewed:
2843 times
Rating of current essay:
Essay content:
Excellent agreement
is obtained with the experimental values of exciton energies for various sizes of
CdS quantum dots in the strong, medium and weak con nement limit.
Keywords: Quantum Dots; excitons and related phenomena; solutions of wave equations:
bound states.
PACS numbers: 73.63.Kv, 71.35...
displayed 300 characters
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Introduction
Semiconductors quantum dots (QDs) have been a subject of intense theoretical and
experimental interest in the last few years.1 Contrary to bulk semiconductors where
the energy is a function of the momentum, in (small) QDs all the bands disappear
and are replaced by discrete levels.2
The increasing experimental capability in the fabrication of QDs for a wide
spectra of sizes, drives the experimental and theoretical interest for the overall
understanding of these systems since, due to quantum con nement, the electronic
and optical properties are strongly dot-size dependent...
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