Semiconductor Nanowires for Thermoelectric Generation

Gadea, Gerard; Morata, Álex; Tarancón, Albert

doi:10.1016/bs.semsem.2018.01.001

Cited by 23 publications

(30 citation statements)

References 153 publications

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“…The ZT values reported here are among the best obtained for a silicon-based macroscopic material, with the additional advantage that our silicon-based fabrics are shape-adaptable and produced by large-scale fabrication techniques. The high ZT values obtained here for large-area and adaptable fabrics demonstrate the potential of extending the range of application of nanostructured silicon from very specific niche applications such as micro-thermoelectric generators to a wide spectrum of large-scale scenarios including industrial waste heat recovery 33 , 34 .…”

Section: Resultsmentioning

confidence: 71%

“…The fabric based on silicon nanotubes here presented is one of the first examples of competitive silicon-based thermoelectric generator since most of the works previously reported in the literature (and used for comparison in Fig. 4d ) are based on expensive and critical raw materials such as Bi 2 Te 2.7 Se 0.3 36 , Bi 2 Te 3 37 , 40 , Bi 2 Te 3 -Sb 2 Te 3 34 , and Eu 8 Ga 16 Ge 30 –Sr 0.5 Fe 4 NiSb 12 33 . Furthermore, thanks to the high porosity of the sample, the provided specific power is remarkably high (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Some other well documented works are presented as references for different temperature ranges and applications. Flexible thermoelectrics 34 – 38 , other higher scale applications 22 , 33 , 38 , and commercial products like Komatsu 40 …”

Section: Resultsmentioning

confidence: 99%

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Large-area and adaptable electrospun silicon-based thermoelectric nanomaterials with high energy conversion efficiencies

et al. 2018

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Large amounts of waste heat generated in our fossil-fuel based economy can be converted into useful electric power by using thermoelectric generators. However, the low-efficiency, scarcity, high-cost and poor production scalability of conventional thermoelectric materials are hindering their mass deployment. Nanoengineering has proven to be an excellent approach for enhancing thermoelectric properties of abundant and cheap materials such as silicon. Nevertheless, the implementation of these nanostructures is still a major challenge especially for covering the large areas required for massive waste heat recovery. Here we present a family of nano-enabled materials in the form of large-area paper-like fabrics made of nanotubes as a cost-effective and scalable solution for thermoelectric generation. A case study of a fabric of p-type silicon nanotubes was developed showing a five-fold improvement of the thermoelectric figure of merit. Outstanding power densities above 100 W/m2 at 700 °C are therefore demonstrated opening a market for waste heat recovery.

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Section: Resultsmentioning

confidence: 71%

Section: Resultsmentioning

confidence: 99%

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Large-area and adaptable electrospun silicon-based thermoelectric nanomaterials with high energy conversion efficiencies

et al. 2018

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“…Moreover, there is a major interest in using silicon due to its high natural abundance and compatibility with microelectronics mainstream fabrication technologies [4]. Silicon nanowires (Si NWs) with diameters in the order of ~100 nm present a significantly reduced  and can be currently obtained with controlled morphology, crystallinity and doping [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…With the improved thermoelectric performance of Si NWs, the importance lays on designing and assembling functional devices able to host dense arrays. However, it is not easy to implement NWs in structures able to use their thermoelectric properties, as their limited length -constrained to the 10-100 µm range due to inherent characteristics of the fabrication processes -makes them highly susceptible to the adverse effects of electrical and thermal contact resistances [6]. While approaches based on horizontal, top-down definition of Si NWs can overcome contact issues, they only allow the growth of nanowires in layer by layer process, with the scaling-up limited by the number of lithography steps [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Enhanced thermoelectric figure of merit of individual Si nanowires with ultralow contact resistances

et al. 2020

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Low-dimensional silicon-based materials have shown a great potential for thermoelectric applications due to their enhanced figure of merit ZT and high technology compatibility. However, their implementation in real devices remains highly challenging due to the associated large contact resistances (thermal and electrical). Herein we demonstrate ultralow contact resistance silicon nanowires epitaxially grown on scalable devices with enhanced ZT. Temperature dependent figure of merit was fully determined for monolithically integrated individual silicon nanowires achieving a maximum value of ZT = 0.2 at 620 K. Sidewise, this work accounts for the first time nearly zero thermal and electrical contact resistances in monolithically integrated bottom-up nanowires.

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Energy Harvesters for Wearable Electronics and Biomedical Devices

Hasan

Sahlan

Osman

et al. 2021

Adv Materials Technologies

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Energy harvesters (EHs) are widely used to transform ambient energy sources into electrical energy, and have tremendous potential to power wearables electronics and biomedical devices by eliminating, or at least increasing, the battery life. Nevertheless, the use of EHs for a specific application depends on various aspects including the form of energy source, the structural configuration of the device, and the properties of materials. This paper presents a comprehensive review of the classification of EHs, notably thermoelectric generators (TEGs), triboelectric nanogenerators (TENGs), and piezoelectric generators (PEGs) that allows a wide variety of devices to be operated. The EHs are discussed in terms of their operating principles, optimization factors, state‐of‐the‐art materials, and device structure, that directly influence their operational efficiency. Besides, the breakthrough performance of each of the EHs listed above is highlighted. From the review and analysis, the maximum output power density of 9.2 mW cm−2, 50 mW cm−2, and 64.9 µW cm−2, respectively, are obtained from the TEG, TENG, and PEG, respectively. Furthermore, recent applications relevant to a specific EH and their output performance, are also enlightened. Eventually, the essential outcomes and future direction from this review are discussed and encapsulated.

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Semiconductor Nanowires for Thermoelectric Generation

Cited by 23 publications

References 153 publications

Large-area and adaptable electrospun silicon-based thermoelectric nanomaterials with high energy conversion efficiencies

Large-area and adaptable electrospun silicon-based thermoelectric nanomaterials with high energy conversion efficiencies

Enhanced thermoelectric figure of merit of individual Si nanowires with ultralow contact resistances

Energy Harvesters for Wearable Electronics and Biomedical Devices

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