Abstract
Luminescent solar concentrators (LSC) absorb large-area solar radiation and guide down-converted emission to solar cells for electricity production. Quantum dots (QDs) have been widely engineered at device and quantum dot levels for LSCs. Here, we demonstrate cascaded energy transfer and exciton recycling at nanoassembly level for LSCs. The graded structure composed of different sized toxic-heavy-metal-free InP/ZnS core/shell QDs incorporated on copper doped InP QDs, facilitating exciton routing toward narrow band gap QDs at a high nonradiative energy transfer efficiency of 66%. At the final stage of non-radiative energy transfer, the photogenerated holes make ultrafast electronic transitions to copper-induced mid-gap states for radiative recombination in the near-infrared. The exciton recycling facilitates a photoluminescence quantum yield increase of 34% and 61% in comparison with semi-graded and ungraded energy profiles, respectively. Thanks to the suppressed reabsorption and enhanced photoluminescence quantum yield, the graded LSC achieved an optical quantum efficiency of 22.2%. Hence, engineering at nanoassembly level combined with nonradiative energy transfer and exciton funneling offer promise for efficient solar energy harvesting.
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23 December 2020
The article “<Emphasis Type="Italic">Exciton recycling via InP quantum dot funnels for luminescent solar concentrators</Emphasis>” written by Houman Bahmani Jalali<Superscript>1</Superscript>,§, Sadra Sadeghi<Superscript>2</Superscript>,§, Isinsu Baylam<Superscript>3,4</Superscript>, Mertcan Han<Superscript>5</Superscript>, Cleva W. Ow-Yang<Superscript>6</Superscript>, Alphan Sennaroglu<Superscript>3,4</Superscript>, and Sedat Nizamoglu<Superscript>1,2,5</Superscript> (✉), was originally published Online First without Open Access. After publication online first, the author decided to opt for Open Choice and to make the article an Open Access publication. Therefore, the copyright of the article has been changed to © The Author(s) 2020 and the article is forthwith distributed under the terms of the Creative Commons Attribution 4.0 International License (<ExternalRef><RefSource>http://creativecommons.org/licenses/by/4.0/</RefSource><RefTarget Address="http://www.creativecommons.org/licenses/by/4.0/" TargetType="URL"/></ExternalRef>), which permits use, duplication, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
The original article has been corrected.
10 January 2021
This article should be an open access journals.
18 February 2021
An Erratum to this paper has been published: https://doi.org/10.1007/s12274-020-3282-y
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This project has received funding from the European Research Council (ERC) under the European Union Horizon 2020 Research and Innovation Programme (grant agreement no. 639846).
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Bahmani Jalali, H., Sadeghi, S., Baylam, I. et al. Exciton recycling via InP quantum dot funnels for luminescent solar concentrators. Nano Res. 14, 1488–1494 (2021). https://doi.org/10.1007/s12274-020-3207-9
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DOI: https://doi.org/10.1007/s12274-020-3207-9