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Journal of Nanotechnology
Volume 2018, Article ID 7285483, 12 pages
Review Article

Multiple Exciton Generation in Nanostructures for Advanced Photovoltaic Cells

Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK

Correspondence should be addressed to Nicholas Siemons; moc.liamg@2819salohcin

Received 2 September 2017; Revised 1 December 2017; Accepted 25 December 2017; Published 25 February 2018

Academic Editor: Sami-Ullah Rather

Copyright © 2018 Nicholas Siemons and Alessio Serafini. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper reviews both experimental and theoretical work on nanostructures showing high quantum yields due to the phenomenon of multiple exciton generation. It outlines the aims and barriers to progress in identifying further such nanostructures and also includes important developments concerning solar devices where nanostructures act as the light-absorbing component. It reports on both semiconductor and carbon structures, both monocomposite (of various dimensionalities) and heterogeneous. Finally, it looks at future directions that can be taken to push solar cell efficiency above the classic limit set by Shockley and Queisser in 1961.