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InGaAs and GaAs quantum dot solar cells grown by droplet epitaxy

Yu, P; Wu, J; Gao, L; Liu, H; Wang, Z; (2016) InGaAs and GaAs quantum dot solar cells grown by droplet epitaxy. Solar Energy Materials and Solar Cells , 161 pp. 377-381. 10.1016/j.solmat.2016.12.024. Green open access

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Abstract

Traditional p-i-n junction solar cells imbedded with quantum dots are attractive to achieve chromatic light absorption enhancement. In this paper, multi-layer stacked GaAs and In0.1Ga0.9As quantum dots grown by the droplet epitaxy technique are sandwiched between Al0.4Ga0.6As layers for solar energy harvesting. The performance of GaAs and InGaAs quantum dot solar cells is compared using structural, optical, and electrical measurements. The two-step photon absorption process is studied via adding external infrared pumping sources in quantum efficiency measurements at room temperature. This work demonstrates that strain-free nanostructures by droplet epitaxy are promising for photovoltaic application.

Type: Article
Title: InGaAs and GaAs quantum dot solar cells grown by droplet epitaxy
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.solmat.2016.12.024
Publisher version: http://dx.doi.org/10.1016/j.solmat.2016.12.024
Additional information: © 2016. This manuscript version is published under a Creative Commons Attribution Non-commercial Non-derivative 4.0 International licence (CC BY-NC-ND 4.0). This licence allows you to share, copy, distribute and transmit the work for personal and non-commercial use providing author and publisher attribution is clearly stated. Further details about CC BY licences are available at http://creativecommons.org/licenses/by/4.0. Access may be initially restricted by the publisher.
Keywords: Quantum dots; Solar cells; Drop epitaxy; Intraband; Interband; Intermediate band
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1539114
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