8-12 July 2013
Africa/Johannesburg timezone
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One step synthesis and characterization of Indium Monoselenide nanoparticles for photovoltaic application

Presented by Ms. Mildred AIRO on 9 Jul 2013 from 17:40 to 18:40
Type: Poster Presentation
Session: Poster1
Track: Track A - Division for Condensed Matter Physics and Materials

Abstract

Nano-sized indium monoselenide, InSe nanoparticles have been synthesized by a novel simple route. The route is based on the thermolysis and selenium and indium (iii)chloride in oleylamine. The role of oleylamine in this method is to reduce selenium while acting as both the solvent and capping agent. This method provides feasible and homogeneous environment for the formation of layers of InSe which later break down to quantum dots as the time progresses. This is contrary to the two processes involved in the growth of nanocrystals in solution phase; the nucleation stage which is followed by the growth of the nanocrystals. The InSe samples were synthesized at a temperature of 200˚C, the mole ratio of Se:InCl3 was 1:1. Time was varied and its effect on the process studied. At the same reaction conditions, the effect of changing the solvent (mixture of oleylamine and oleic acid) on the size and morphology on the final nanoparticles was investigated. The optical properties of the resulting nanoparticles have been studied by obtaining their photoluminescence and absorption spectra. In addition, the morphology and phase structure of the Indium monoselenide nanoparticals have been determined by X-ray diffraction and transmission electron microscopy.

Award

YES

Level

MSc

Supervisor

Dr. Nosipho Moloto, Nosipho.Moloto@wits.ac.za. University of Witwatersrand.

Paper

No

Primary authors

  • Ms. Mildred AIRO MSc student, School of Chemistry, University of Witwatersrand
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