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Quantitative analysis of thermal stability of CdSe/CdS core-shell nanocrystals under infrared radiation

  • A. Singha (a1) and Anushree Roy (a1)

Abstract

Here, we report investigations on the instability in luminescence of bare (trioctylphosphine oxide [TOPO]-stabilized) and CdS-capped CdSe particles under infrared radiation. During thermal annealing under radiation, the formation of oxide layers on the surfaces of the particles create defect states. Consequently, there is a reduction in particle size. These two effects control the light output from the samples. We make a quantitative comparison of the stability of bare CdSe and core-shell-type CdSe-CdS particles during annealing under infrared radiation. Using diffusion theory, we show that the volume of the oxide layer, adhered to the crystallites, plays a dominant role in controlling the luminosity of the particles.

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Corresponding author

a) Address all correspondence to this author. e-mail: anushree@phy.iitkgp.ernet.in

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Keywords

Quantitative analysis of thermal stability of CdSe/CdS core-shell nanocrystals under infrared radiation

  • A. Singha (a1) and Anushree Roy (a1)

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