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Non-radiative Processes in Nanocrystals

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Nano-Optics: Principles Enabling Basic Research and Applications
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Abstract

This paper discusses non-radiative processes relevant to the luminescence characteristics of optically active ions doped into insulators or large-gap semiconductors, with particular attention to how these processes are affected as the particle size is reduced from bulk single crystals to as small as a few nanometers. The non-radiative processes discussed in this article are thermal line broadening and thermal line shifting, relaxation via phonons between excited electronic states, and vibronic emission and absorption. One prominent effect of confinement in the systems of interest is a reduction in the phonon density of states. Thus, we focus on how these non-radiative processes are altered due to the change in the phonon density of states as particle size decreases.

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Acknowledgements

The Author would like to that Ryan Clair of Wheaton College for the calculations of the density of states of the nanoparticles, and also to Professor Rino Di Bartolo of Boston College for the opportunity to lecture at the Erice 2015 School. The author also acknowledges that the material presented here was supported in part by the Nation Science Foundation under grant number 1105907.

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Correspondence to J. M. Collins .

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Collins, J.M. (2017). Non-radiative Processes in Nanocrystals. In: Di Bartolo, B., Collins, J., Silvestri, L. (eds) Nano-Optics: Principles Enabling Basic Research and Applications. NATO Science for Peace and Security Series B: Physics and Biophysics. Springer, Dordrecht. https://doi.org/10.1007/978-94-024-0850-8_4

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  • DOI: https://doi.org/10.1007/978-94-024-0850-8_4

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  • Online ISBN: 978-94-024-0850-8

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