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Strain-free ring-shaped nanostructures by droplet epitaxy for photovoltaic application

Wu, J; Wang, ZM; Dorogan, VG; Li, S; Zhou, Z; Li, H; Lee, J; ... Salamo, GJ; + view all (2012) Strain-free ring-shaped nanostructures by droplet epitaxy for photovoltaic application. APPLIED PHYSICS LETTERS , 101 (4) 10.1063/1.4738996.

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Abstract

Droplet epitaxy is a flexible nanomaterial growth technique and is a potential method to fabricate advanced electronic and optoelectronic devices. Here, we report strain-free GaAs/Al0.33Ga0.67As quantum ring solar cells fabricated by droplet epitaxy technique. Photoluminescence is used to study the electronic structure of the lattice-matched GaAs/Al0.33Ga0.67As quantum ring solar cells. Post-growth thermal annealing is used to improve the optical quality of the solar cell as well as device efficiency. A power conversion efficiency of 1.8% is demonstrated from a prototype quantum ring solar cell. This work opens new opportunities for quantum dot solar cells with strain-free nanostructures. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4738996]

Type: Article
Title: Strain-free ring-shaped nanostructures by droplet epitaxy for photovoltaic application
DOI: 10.1063/1.4738996
Additional information: article-number: 043904 researcherid-numbers: Dorogan, Vitaliy/D-7019-2012 Zhou, Zhihua/B-7290-2009 Li, Handong/J-5225-2015 orcid-numbers: Zhou, Zhihua/0000-0001-5014-6946 unique-id: ISI:000306944700120
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: http://discovery.ucl.ac.uk/id/eprint/1541457
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