Fabrication and characterization of ultrathin thermoelectric device for energy conversion

Mu, Erzhen; Yang, Gang; Fu, Xuecheng; Wang, Fengdan; Hu, Zhiyu

doi:10.1016/j.jpowsour.2018.05.031

Cited by 31 publications

(17 citation statements)

References 67 publications

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“…In order to match heat sources, the thermal resistance of FTE devices can be adjusted by optimizing device dimensions and geometry, where finite element analysis could be effective in predicting corresponding thermal resistances . By combining microscale inorganic TE legs into flexible substrates, microfabrication might be an effective way to overcome the mechanical inflexibility of inorganic TEs . Finally, since most recent studies focus on harvesting thermal energy to generate electricity, devices aiming for FTE cooling effects deserve future investigation …”

Section: Discussionmentioning

confidence: 99%

“…[416] By combining microscale inorganic TE legs into flexible substrates, microfabrication might be an effective way to overcome the mechanical inflexibility of inorganic TEs. [407] Finally, since most recent studies focus on harvesting thermal energy to generate electricity, devices aiming for FTE cooling effects deserve future investigation. [417,418] www.advmat.de www.advancedsciencenews.com…”

Section: Discussionmentioning

confidence: 99%

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Flexible Thermoelectric Materials and Generators: Challenges and Innovations

et al. 2019

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The urgent need for ecofriendly, stable, long‐lifetime power sources is driving the booming market for miniaturized and integrated electronics, including wearable and medical implantable devices. Flexible thermoelectric materials and devices are receiving increasing attention, due to their capability to convert heat into electricity directly by conformably attaching them onto heat sources. Polymer‐based flexible thermoelectric materials are particularly fascinating because of their intrinsic flexibility, affordability, and low toxicity. There are other promising alternatives including inorganic‐based flexible thermoelectrics that have high energy‐conversion efficiency, large power output, and stability at relatively high temperature. Herein, the state‐of‐the‐art in the development of flexible thermoelectric materials and devices is summarized, including exploring the fundamentals behind the performance of flexible thermoelectric materials and devices by relating materials chemistry and physics to properties. By taking insights from carrier and phonon transport, the limitations of high‐performance flexible thermoelectric materials and the underlying mechanisms associated with each optimization strategy are highlighted. Finally, the remaining challenges in flexible thermoelectric materials are discussed in conclusion, and suggestions and a framework to guide future development are provided, which may pave the way for a bright future for flexible thermoelectric devices in the energy market.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Flexible Thermoelectric Materials and Generators: Challenges and Innovations

et al. 2019

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“…S1 shows schematically the basic steps of the fabrication process of the MEMS devices. The details of the fabrication method are initially proposed and then, demonstrated as a hybrid fabrication technique for ultrathin thermoelectric devices in a previous work of this research group [22]. In order to prevent the oxidation of copper in the electrode, the sacrificial photoresist was not removed in these MEMS devices.…”

Section: Fabrication Of the Te Thin Films And Mems Thermoelectric Devmentioning

confidence: 99%

“…One can conclude that when the external load is equivalent to its internal resistance, the calculated maximum output power of ST-BP reaches 10.5 nW at 463 K, and the output power density is 0.02 W m −2 and 2.88 × 10 4 W m −3 . In addition, if a forced cold end is added to the existent cold end of the device, the output can be increased by one to two orders of magnitude [22]. The in-plane Seebeck coefficient of the Bi 2 Te 3 /Au multilayers decreases upon an increase of the temperature, leading to the superior properties of the ST-BP material at high temperature.…”

Section: Characterizations Of the Te Devicesmentioning

confidence: 99%

Ultrathin MEMS thermoelectric generator with Bi2Te3/(Pt, Au) multilayers and Sb2Te3 legs

Liu

et al. 2020

Nano Convergence

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Multilayer structure is one of the research focuses of thermoelectric (TE) material in recent years. In this work, n-type 800 nm Bi 2 Te 3 /(Pt, Au) multilayers are designed with p-type Sb 2 Te 3 legs to fabricate ultrathin microelectromechanical systems (MEMS) TE devices. The power factor of the annealed Bi 2 Te 3 /Pt multilayer reaches 46.5 μW cm −1 K −2 at 303 K, which corresponds to more than a 350% enhancement when compared to pristine Bi 2 Te 3 . The annealed Bi 2 Te 3 /Au multilayers have a lower power factor than pristine Bi 2 Te 3 . The power of the device with Sb 2 Te 3 and Bi 2 Te 3 /Pt multilayers measures 20.9 nW at 463 K and the calculated maximum output power reaches 10.5 nW, which is 39.5% higher than the device based on Sb 2 Te 3 and Bi 2 Te 3 , and 96.7% higher than the Sb 2 Te 3 and Bi 2 Te 3 /Au multilayers one. This work can provide an opportunity to improve TE properties by using multilayer structures and novel ultrathin MEMS TE devices in a wide variety of applications.

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“…28 Recently, new technological advances that enable power production from smaller temperature gradients using innovative micromechanical design are emerging. [29][30][31][32][33][34] In this work, MOST systems are, for the first time, combined with an integrated microelectromechanical thermoelectric generation device (MEMS-TEG) [35][36][37] to demonstrate the cascading energy flow from solar harvesting and storage to heat energy release which is finally used to generate power (see Figure. 1).…”

Section: Introductionmentioning

confidence: 99%

Molecular Solar Thermal Power Generation

Wang

Hu²,

Mu³

et al. 2020

Preprint

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Harvesting solar energy into electrical power can be an attractive way for the development of cleaner energy. However, traditional solar photovoltaic technologies operate strongly dependent on solar intermittency. Molecular solar thermal energy storage (MOST) is a new technology based on photoswitchable materials, which allow sunlight to be stored and released as chemical energy on-demand. We here characterized the photophysical properties of two MOST couples both in liquid and phase interconvertible neat film. Their suitable MOST properties let us combine them individually with a microelectromechanical ultrathin thermoelectric chip to use the stored solar energy for electrical power generation. The generator can produce a surface output power up to 1.2 mW·m<sup>-2</sup> for the liquid form and 0.6 mW·m<sup>-2</sup> for the neat film form. Our results demonstrated that such a molecular thermal power generation system has a high potential to store and transfer solar power into electricity, and is thus independent of geographical restrictions.

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Fabrication and characterization of ultrathin thermoelectric device for energy conversion

Cited by 31 publications

References 67 publications

Flexible Thermoelectric Materials and Generators: Challenges and Innovations

Flexible Thermoelectric Materials and Generators: Challenges and Innovations

Ultrathin MEMS thermoelectric generator with Bi2Te3/(Pt, Au) multilayers and Sb2Te3 legs

Molecular Solar Thermal Power Generation

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