Optical structure modification induced by lattice strain in Mn-doped CdSe QDs

Hamizi, Nor Aliya and Johan, Mohd Rafie and Chowdhury, Zaira Zaman and Wahab, Yasmin Abdul and Al-Douri, Yarub and Saat, Asmalina Mohamed and Pivehzhani, Omid Akbarzadeh (2018) Optical structure modification induced by lattice strain in Mn-doped CdSe QDs. Optical Materials, 86. pp. 441-448. ISSN 0925-3467

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Official URL: https://doi.org/10.1016/j.optmat.2018.10.041

Abstract

Narrow size distribution manganese-doped cadmium selenide quantum dots (Mn-doped CdSe QDs) successfully synthesized using inverse Micelle technique with organic solvent and surfactant possesses zinc blende structure with physical size ranging from 3 to 14 nm and crystallite size 2.46–5.46 nm. Mn-doped CdSe QDs observed to growth larger QDs compared to pure CdSe QDs at significantly same reaction times. The lattice parameter compressed with QDs sizes growth due to the introduction of lattice strain provoked by the incorporation of Mn atoms into CdSe QDs lattice. The Mn-doped CdSe QDs shows a slight blue-shift on absorption and emission spectra's compared to pure CdSe even though is possessed larger QDs. The band gap structure modification prominently affected by the lattice strain were transition of Stoke's, Rayleigh to anti-Stoke’s shifts observed as the Mn-doped CdSe QDs size growth. The typical red-shift of absorption and emission wavelength observed with growth of QDs sizes. The role of oleic acid as a surfactant and capping agent shows in FTIR spectra. The lattice strain tailored the binding energy between the ion prominently on the surface of the QDs with growth of QDs sizes.

Item Type: Article
Uncontrolled Keywords: Absorption and emission spectra; Absorption and emissions; Band gap structure; Cadmium selenides; Inverse micelles; Narrow size distributions; Optical structures; Zinc-blende structures
Subjects: T Technology > TP Chemical technology
Divisions: Deputy Vice Chancellor (Research & Innovation) Office > Nanotechnology & Catalysis Research Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 19 Aug 2019 04:52
Last Modified: 19 Aug 2019 04:52
URI: http://eprints.um.edu.my/id/eprint/21962

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