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Rectifying the output of vibrational piezoelectric energy harvester using quantum dots

Lijie Li Orcid Logo

Scientific Reports, Volume: 7, Start page: 44859

Swansea University Author: Lijie Li Orcid Logo

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DOI (Published version): 10.1038/srep44859

Abstract

Piezoelectric energy harvester scavenges mechanical vibrations and generates electricity. Researchers have strived to optimize the electromechanical structures and to design necessary external power management circuits, aiming to deliver high power and rectified outputs ready for serving as batterie...

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Published in: Scientific Reports
ISSN: 2045-2322
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa32506
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first_indexed 2017-03-20T20:08:22Z
last_indexed 2018-02-09T05:20:28Z
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spelling 2018-01-15T11:01:46.5580978 v2 32506 2017-03-20 Rectifying the output of vibrational piezoelectric energy harvester using quantum dots ed2c658b77679a28e4c1dcf95af06bd6 0000-0003-4630-7692 Lijie Li Lijie Li true false 2017-03-20 EEEG Piezoelectric energy harvester scavenges mechanical vibrations and generates electricity. Researchers have strived to optimize the electromechanical structures and to design necessary external power management circuits, aiming to deliver high power and rectified outputs ready for serving as batteries. Complex deformation of the mechanical structure results in charges with opposite polarities appearing on same surface, leading to current loss in the attached metal electrode. External power management circuits such as rectifiers comprise diodes that consume power and have undesirable forward bias. To address the above issues, we devise a novel integrated piezoelectric energy harvesting device that is structured by stacking a layer of quantum dots (QDs) and a layer of piezoelectric material. We find that the QD can rectify electrical charges generated from the piezoelectric material because of its adaptable conductance to the electrochemical potentials of both sides of the QDs layer, so that electrical current causing energy loss on the same surface of the piezoelectric material can be minimized. The QDs layer has the potential to replace external rectification circuits providing a much more compact and less power-consumption solution. Journal Article Scientific Reports 7 44859 2045-2322 20 3 2017 2017-03-20 10.1038/srep44859 COLLEGE NANME Electronic and Electrical Engineering COLLEGE CODE EEEG Swansea University RCUK, EP/H004742/1 2018-01-15T11:01:46.5580978 2017-03-20T13:57:52.0385824 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering Lijie Li 0000-0003-4630-7692 1 0032506-27032017150504.pdf li2017(4).pdf 2017-03-27T15:05:04.9170000 Output 542286 application/pdf Version of Record true 2017-03-27T00:00:00.0000000 false eng
title Rectifying the output of vibrational piezoelectric energy harvester using quantum dots
spellingShingle Rectifying the output of vibrational piezoelectric energy harvester using quantum dots
Lijie Li
title_short Rectifying the output of vibrational piezoelectric energy harvester using quantum dots
title_full Rectifying the output of vibrational piezoelectric energy harvester using quantum dots
title_fullStr Rectifying the output of vibrational piezoelectric energy harvester using quantum dots
title_full_unstemmed Rectifying the output of vibrational piezoelectric energy harvester using quantum dots
title_sort Rectifying the output of vibrational piezoelectric energy harvester using quantum dots
author_id_str_mv ed2c658b77679a28e4c1dcf95af06bd6
author_id_fullname_str_mv ed2c658b77679a28e4c1dcf95af06bd6_***_Lijie Li
author Lijie Li
author2 Lijie Li
format Journal article
container_title Scientific Reports
container_volume 7
container_start_page 44859
publishDate 2017
institution Swansea University
issn 2045-2322
doi_str_mv 10.1038/srep44859
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering
document_store_str 1
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description Piezoelectric energy harvester scavenges mechanical vibrations and generates electricity. Researchers have strived to optimize the electromechanical structures and to design necessary external power management circuits, aiming to deliver high power and rectified outputs ready for serving as batteries. Complex deformation of the mechanical structure results in charges with opposite polarities appearing on same surface, leading to current loss in the attached metal electrode. External power management circuits such as rectifiers comprise diodes that consume power and have undesirable forward bias. To address the above issues, we devise a novel integrated piezoelectric energy harvesting device that is structured by stacking a layer of quantum dots (QDs) and a layer of piezoelectric material. We find that the QD can rectify electrical charges generated from the piezoelectric material because of its adaptable conductance to the electrochemical potentials of both sides of the QDs layer, so that electrical current causing energy loss on the same surface of the piezoelectric material can be minimized. The QDs layer has the potential to replace external rectification circuits providing a much more compact and less power-consumption solution.
published_date 2017-03-20T03:39:50Z
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score 11.013731

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