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Exciton Energy of CdS Quantum Dots

Essay specific features

 

Issue:

Science

 

Written by:

Ruth C

 

Date added:

October 12, 2016

 

Level:

University

 

Grade:

A

 

No of pages / words:

12 / 3215

 

Was viewed:

2850 times

 

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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...
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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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