Synthesis with Different Se Concentrations and Optical Studies of CdSe Quantum Dots via Inverse Micelle Technique

In this work, Cadmium selenide quantum dots (CdSe QDs) are synthesized successfully without the use of trioctylphosphine (TOP) at various concentrations of selenium (Se) precursor. UV-vis, PL and FTIR spectroscopy, as well as TEM and XRD are used for characterization studies of the CdSe QDs. The XRD...

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Bibliographic Details
Published in:International journal of electrochemical science 2012, Vol.7 (5), p.4727-4734
Main Authors: Hamizi, Nor Aliya, Ying, Ch’ng Shiau, Johan, Mohd Rafie
Format: Article
Language:English
Subjects:
chemical synthesis
nanostructures
optical properties
PACS numbers: 78.66.Bz, 81.07.Nb
Semiconductors
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Summary:In this work, Cadmium selenide quantum dots (CdSe QDs) are synthesized successfully without the use of trioctylphosphine (TOP) at various concentrations of selenium (Se) precursor. UV-vis, PL and FTIR spectroscopy, as well as TEM and XRD are used for characterization studies of the CdSe QDs. The XRD pattern shows zinc-blend phase of the CdSe QDs. The absorption and PL spectra exhibit a strong blue-shift with decreasing QDs size, which is attributed to the quantum confinement effect. TEM image reveal that the CdSe QDs are spherical, compact and dense in structure with a maximum particles size of 8nm. The results of this research also indicate the increasing the Cd and Se molar ratios affect the size of CdSe QDs. The FTIR results also show the bonding on the surface of QDs. The results are likely to be useful towards the understanding on the formation mechanism of CdSe QDs.
ISSN:1452-3981
1452-3981
DOI:10.1016/S1452-3981(23)19577-0