Large-area implementation and critical evaluation of the material and fabrication aspects of a thin-film thermoelectric generator based on aluminum-doped zinc oxide

Kirsi Tappura (Corresponding Author), Taneli Juntunen, Kaarle Jaakkola, Mikko Ruoho, Ilkka Tittonen, Riina Ritasalo, Marko Pudas

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

A large-area thermoelectric generator (TEG) utilizing a folded thin-film concept is implemented and the performance evaluated for near room temperature applications having modest temperature gradients (<50 K). The TEGs with the area of ∼0.33 m2 are shown capable of powering a wireless sensor node of multiple sensors suitable e.g. for monitoring environmental variables in buildings. The TEGs are based on a transparent, non-toxic and abundant thermoelectric material, i.e. aluminium-doped zinc oxide (AZO), deposited on flexible substrates. After folding, both the electrical current and heat flux are in the plane of the thermoelectric thin-film. Heat leakage in the folded TEG is shown to be minimal (close to that of air), enabling sufficient temperature gradients without efficient heat sinks, contrary to the conventional TEGs having the thermal flux and electrical current perpendicular to the plane of the thermoelectric films. The long-term stability studies reveal that there are no significant changes in the electrical or thermoelectric properties of AZO over several months, while the contact resistance between AZO and silver ink is an issue exhibiting a continuous increase over time. The performance of the TEGs and technological implications in relation to a state-of-the-art thermoelectric material are further assessed via a computational study.

Original languageEnglish
Pages (from-to)1292-1298
Number of pages7
JournalRenewable Energy
Volume147
Early online date18 Sep 2019
DOIs
Publication statusE-pub ahead of print - 18 Sep 2019
MoE publication typeA1 Journal article-refereed

Fingerprint

Zinc oxide
Aluminum
Fabrication
Thin films
Thermal gradients
Heat sinks
Contact resistance
Sensor nodes
Ink
Heat flux
Silver
Fluxes
Monitoring
Sensors
Substrates
Air
Temperature
Hot Temperature

Keywords

  • Aluminum-doped zinc oxide
  • Atomic layer deposition
  • Finite element method
  • Large-area thermoelectric generator
  • Thin-film TEG

Cite this

@article{3fd64d2f16524bc6802270de41bf36f5,
title = "Large-area implementation and critical evaluation of the material and fabrication aspects of a thin-film thermoelectric generator based on aluminum-doped zinc oxide",
abstract = "A large-area thermoelectric generator (TEG) utilizing a folded thin-film concept is implemented and the performance evaluated for near room temperature applications having modest temperature gradients (<50 K). The TEGs with the area of ∼0.33 m2 are shown capable of powering a wireless sensor node of multiple sensors suitable e.g. for monitoring environmental variables in buildings. The TEGs are based on a transparent, non-toxic and abundant thermoelectric material, i.e. aluminium-doped zinc oxide (AZO), deposited on flexible substrates. After folding, both the electrical current and heat flux are in the plane of the thermoelectric thin-film. Heat leakage in the folded TEG is shown to be minimal (close to that of air), enabling sufficient temperature gradients without efficient heat sinks, contrary to the conventional TEGs having the thermal flux and electrical current perpendicular to the plane of the thermoelectric films. The long-term stability studies reveal that there are no significant changes in the electrical or thermoelectric properties of AZO over several months, while the contact resistance between AZO and silver ink is an issue exhibiting a continuous increase over time. The performance of the TEGs and technological implications in relation to a state-of-the-art thermoelectric material are further assessed via a computational study.",
keywords = "Aluminum-doped zinc oxide, Atomic layer deposition, Finite element method, Large-area thermoelectric generator, Thin-film TEG",
author = "Kirsi Tappura and Taneli Juntunen and Kaarle Jaakkola and Mikko Ruoho and Ilkka Tittonen and Riina Ritasalo and Marko Pudas",
year = "2019",
month = "9",
day = "18",
doi = "10.1016/j.renene.2019.09.093",
language = "English",
volume = "147",
pages = "1292--1298",
journal = "Renewable Energy",
issn = "0960-1481",
publisher = "Elsevier",

}

Large-area implementation and critical evaluation of the material and fabrication aspects of a thin-film thermoelectric generator based on aluminum-doped zinc oxide. / Tappura, Kirsi (Corresponding Author); Juntunen, Taneli; Jaakkola, Kaarle; Ruoho, Mikko; Tittonen, Ilkka; Ritasalo, Riina; Pudas, Marko.

In: Renewable Energy, Vol. 147, 03.2020, p. 1292-1298.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Large-area implementation and critical evaluation of the material and fabrication aspects of a thin-film thermoelectric generator based on aluminum-doped zinc oxide

AU - Tappura, Kirsi

AU - Juntunen, Taneli

AU - Jaakkola, Kaarle

AU - Ruoho, Mikko

AU - Tittonen, Ilkka

AU - Ritasalo, Riina

AU - Pudas, Marko

PY - 2019/9/18

Y1 - 2019/9/18

N2 - A large-area thermoelectric generator (TEG) utilizing a folded thin-film concept is implemented and the performance evaluated for near room temperature applications having modest temperature gradients (<50 K). The TEGs with the area of ∼0.33 m2 are shown capable of powering a wireless sensor node of multiple sensors suitable e.g. for monitoring environmental variables in buildings. The TEGs are based on a transparent, non-toxic and abundant thermoelectric material, i.e. aluminium-doped zinc oxide (AZO), deposited on flexible substrates. After folding, both the electrical current and heat flux are in the plane of the thermoelectric thin-film. Heat leakage in the folded TEG is shown to be minimal (close to that of air), enabling sufficient temperature gradients without efficient heat sinks, contrary to the conventional TEGs having the thermal flux and electrical current perpendicular to the plane of the thermoelectric films. The long-term stability studies reveal that there are no significant changes in the electrical or thermoelectric properties of AZO over several months, while the contact resistance between AZO and silver ink is an issue exhibiting a continuous increase over time. The performance of the TEGs and technological implications in relation to a state-of-the-art thermoelectric material are further assessed via a computational study.

AB - A large-area thermoelectric generator (TEG) utilizing a folded thin-film concept is implemented and the performance evaluated for near room temperature applications having modest temperature gradients (<50 K). The TEGs with the area of ∼0.33 m2 are shown capable of powering a wireless sensor node of multiple sensors suitable e.g. for monitoring environmental variables in buildings. The TEGs are based on a transparent, non-toxic and abundant thermoelectric material, i.e. aluminium-doped zinc oxide (AZO), deposited on flexible substrates. After folding, both the electrical current and heat flux are in the plane of the thermoelectric thin-film. Heat leakage in the folded TEG is shown to be minimal (close to that of air), enabling sufficient temperature gradients without efficient heat sinks, contrary to the conventional TEGs having the thermal flux and electrical current perpendicular to the plane of the thermoelectric films. The long-term stability studies reveal that there are no significant changes in the electrical or thermoelectric properties of AZO over several months, while the contact resistance between AZO and silver ink is an issue exhibiting a continuous increase over time. The performance of the TEGs and technological implications in relation to a state-of-the-art thermoelectric material are further assessed via a computational study.

KW - Aluminum-doped zinc oxide

KW - Atomic layer deposition

KW - Finite element method

KW - Large-area thermoelectric generator

KW - Thin-film TEG

UR - http://www.scopus.com/inward/record.url?scp=85072577550&partnerID=8YFLogxK

U2 - 10.1016/j.renene.2019.09.093

DO - 10.1016/j.renene.2019.09.093

M3 - Article

AN - SCOPUS:85072577550

VL - 147

SP - 1292

EP - 1298

JO - Renewable Energy

JF - Renewable Energy

SN - 0960-1481

ER -