Low-temperature synthesis and characterisation of ultra-small cadmium selenide quantum dots in octadecene solution

U. C. Ahamefula, M. Y. Sulaiman, Zahari Ibarahim, Noor Baa`Yah Ibrahim, Mohd. Yusof Othman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Semiconductor quantum dots (QDs) exhibit diverse opto-electronic properties for multi-task applications which can be stimulated by spatial control distribution of their chemical composition. These unique properties facilitated the synthesis of ultra-small non-injection one-pot cadmium selenide (CdSe) QDs in octadecene (OTD) solution at low temperature in quest for innovation-driven cost reductions of photovoltaic material. The synthesis that lasted for 2 hrs started by heating 10 ml of OTD to 35°C followed by the addition of 13 g of cadmium oxide (CdO), 0.4 ml trioctlyphosphine (TOPO), 0.6 ml of oleic acid (OA) and 5 mg of selenium (Se) powder. The heating was extended to 95°C on adding the mixtures. The optical properties of the colloidal CdSe QDs generated upon reaction were characterised using absorption spectroscopy (UV-Vis) and photoluminescence spectroscopy (PL). Atomic force microscopy (AFM) and scanning electron microscopy (SEM) revealed the surface morphology of the CdSe QD particles. The particle orientation and microstructure cubic structure of the lattice studied using transmission electron microscopy (TEM) and field emission scanning electron microscopy (FESEM) revealed the cubic structure of the sample. Although the operation was safe, the low-cost reproducible low temperature synthesised high-quality CdSe QDs was stable for about five months.

Original languageEnglish
Title of host publicationEnergy Procedia
PublisherElsevier BV
Pages62-69
Number of pages8
Volume25
DOIs
Publication statusPublished - 2012
EventPV Asia Pacific Conference, PVAP 2011 - Singapore, Singapore
Duration: 2 Nov 20114 Nov 2011

Other

OtherPV Asia Pacific Conference, PVAP 2011
CountrySingapore
CitySingapore
Period2/11/114/11/11

Fingerprint

Cadmium
Semiconductor quantum dots
Temperature
Heating
Scanning electron microscopy
Photoluminescence spectroscopy
Oleic acid
Selenium
Cost reduction
Ultraviolet spectroscopy
Absorption spectroscopy
Electronic properties
Field emission
Surface morphology
Atomic force microscopy
Optical properties
Innovation
Transmission electron microscopy
Powders
Microstructure

Keywords

  • CdSe QDs
  • Low temperature synthesis
  • Nanocrystals
  • Opto-electronic properties
  • Photoluminescence

ASJC Scopus subject areas

  • Energy(all)

Cite this

Low-temperature synthesis and characterisation of ultra-small cadmium selenide quantum dots in octadecene solution. / Ahamefula, U. C.; Sulaiman, M. Y.; Ibarahim, Zahari; Ibrahim, Noor Baa`Yah; Othman, Mohd. Yusof.

Energy Procedia. Vol. 25 Elsevier BV, 2012. p. 62-69.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ahamefula, UC, Sulaiman, MY, Ibarahim, Z, Ibrahim, NBY & Othman, MY 2012, Low-temperature synthesis and characterisation of ultra-small cadmium selenide quantum dots in octadecene solution. in Energy Procedia. vol. 25, Elsevier BV, pp. 62-69, PV Asia Pacific Conference, PVAP 2011, Singapore, Singapore, 2/11/11. https://doi.org/10.1016/j.egypro.2012.07.009
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