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Staircase Quantum Dots Configuration in Nanowires for Optimized Thermoelectric Power

Lijie Li Orcid Logo, Jian-Hua Jiang

Scientific Reports, Volume: 6, Issue: 1

Swansea University Author: Lijie Li Orcid Logo

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DOI (Published version): 10.1038/srep31974

Abstract

The performance of thermoelectric energy harvesters can be improved by nanostructures that exploit inelastic transport processes. One prototype is the three-terminal hopping thermoelectric device where electron hopping between quantum-dots are driven by hot phonons. Such three-terminal hopping therm...

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Published in: Scientific Reports
ISSN: 2045-2322 2045-2322
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa29634
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first_indexed 2016-08-24T03:51:17Z
last_indexed 2021-01-15T03:47:27Z
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spelling 2021-01-14T13:23:58.3261465 v2 29634 2016-08-24 Staircase Quantum Dots Configuration in Nanowires for Optimized Thermoelectric Power ed2c658b77679a28e4c1dcf95af06bd6 0000-0003-4630-7692 Lijie Li Lijie Li true false 2016-08-24 EEEG The performance of thermoelectric energy harvesters can be improved by nanostructures that exploit inelastic transport processes. One prototype is the three-terminal hopping thermoelectric device where electron hopping between quantum-dots are driven by hot phonons. Such three-terminal hopping thermoelectric devices have potential in achieving high efficiency or power via inelastic transport and without relying on heavy-elements or toxic compounds. We show in this work how output power of the device can be optimized via tuning the number and energy configuration of the quantum-dots embedded in parallel nanowires. We find that the staircase energy configuration with constant energy-step can improve the power factor over a serial connection of a single pair of quantum-dots. Moreover, for a fixed energy-step, there is an optimal length for the nanowire. Similarly for a fixed number of quantum-dots there is an optimal energy-step for the output power. Our results are important for future developments of high-performance nanostructured thermoelectric devices. Journal Article Scientific Reports 6 1 2045-2322 2045-2322 23 8 2016 2016-08-23 10.1038/srep31974 COLLEGE NANME Electronic and Electrical Engineering COLLEGE CODE EEEG Swansea University RCUK, EP/H004742/1 2021-01-14T13:23:58.3261465 2016-08-24T02:18:35.9630747 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 Jian-Hua Jiang 2 0029634-25082016142442.pdf li2016v2.pdf 2016-08-25T14:24:42.0170000 Output 554183 application/pdf Version of Record true Released under the terms of a Creative Commons Attribution License (CC-BY). true English http://creativecommons.org/licenses/by/4.0/
title Staircase Quantum Dots Configuration in Nanowires for Optimized Thermoelectric Power
spellingShingle Staircase Quantum Dots Configuration in Nanowires for Optimized Thermoelectric Power
Lijie Li
title_short Staircase Quantum Dots Configuration in Nanowires for Optimized Thermoelectric Power
title_full Staircase Quantum Dots Configuration in Nanowires for Optimized Thermoelectric Power
title_fullStr Staircase Quantum Dots Configuration in Nanowires for Optimized Thermoelectric Power
title_full_unstemmed Staircase Quantum Dots Configuration in Nanowires for Optimized Thermoelectric Power
title_sort Staircase Quantum Dots Configuration in Nanowires for Optimized Thermoelectric Power
author_id_str_mv ed2c658b77679a28e4c1dcf95af06bd6
author_id_fullname_str_mv ed2c658b77679a28e4c1dcf95af06bd6_***_Lijie Li
author Lijie Li
author2 Lijie Li
Jian-Hua Jiang
format Journal article
container_title Scientific Reports
container_volume 6
container_issue 1
publishDate 2016
institution Swansea University
issn 2045-2322
2045-2322
doi_str_mv 10.1038/srep31974
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
active_str 0
description The performance of thermoelectric energy harvesters can be improved by nanostructures that exploit inelastic transport processes. One prototype is the three-terminal hopping thermoelectric device where electron hopping between quantum-dots are driven by hot phonons. Such three-terminal hopping thermoelectric devices have potential in achieving high efficiency or power via inelastic transport and without relying on heavy-elements or toxic compounds. We show in this work how output power of the device can be optimized via tuning the number and energy configuration of the quantum-dots embedded in parallel nanowires. We find that the staircase energy configuration with constant energy-step can improve the power factor over a serial connection of a single pair of quantum-dots. Moreover, for a fixed energy-step, there is an optimal length for the nanowire. Similarly for a fixed number of quantum-dots there is an optimal energy-step for the output power. Our results are important for future developments of high-performance nanostructured thermoelectric devices.
published_date 2016-08-23T03:36:03Z
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score 11.01628

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