Micropower thermoelectric generator from thin Si membranes

Pérez‐Marín, Antonio P.; Lopeandía, A. F.; Abad, Ll.; Ferrando-Villaba, P.; García, G.; López, Antonio M.; Muñoz-Pascual, Francesc-Xavier; Rodríguez‐Viejo, J.

doi:10.1016/j.nanoen.2013.12.007

Cited by 60 publications

(48 citation statements)

References 19 publications

(30 reference statements)

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“…Independent values of σ and κ can be found in the Supplementary Figure 6 and Supplementary Note 3 and is compared with different literature values 17 , 21 , 22 , 24 – 26 . A remarkable decrease observed for both κ and σ is due to the trivial effect of a high porosity and tortuosity.…”

Section: Resultsmentioning

confidence: 96%

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: 96%

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

et al. 2018

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“…Second, by using low thermal conductivity materials like amorphous silicon nitride and bismuth telluride, the thermal link to the heat bath is severely reduced as compared to the use of polysilicon [11,12,14]. This leads to thermal conductance of the order of 10 −7 W.K −1 , supports a n or p-type Bi 2 XTe 3 thin films: the p-type (orange) is Bi 2−x Sb x Te 3 and the n-type (blue) is Bi 2−x Te 3 Se x .…”

Section: Introductionmentioning

confidence: 99%

Network of thermoelectric nanogenerators for low power energy harvesting

et al. 2019

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We report the design, elaboration and measurements of an innovative planar thermoelectric (TE) devices made of a large array of small mechanically suspended nanogenerators (nanoTEG). The miniaturized TE generators based on SiN membranes are arranged in series and/or in parallel depending on the expected final resistance adapted to the one of the load. The microstructuration allows, at the same time, a high thermal insulation of the membrane from the silicon frame and high thermal coupling to its environment (surrounding air, radiations). We show a ratio of 60% between the measured effective temperature of the membrane, (and hence of the TE junctions), and the available temperature of the heat source (air). The thermal gradient generated across the TE junction reaches a value as high as 60 kelvin per mm. Energy harvesting with this planar TE module is demonstrated through the collected voltage on the TE junctions when a temperature gradient is applied, showing a harvested power on the order of 0.3 µWatt for a 1 cm 2 chip for an effective temperature gradient of 10 K. The optimization of nanoTEGs performances will increase the power harvested significantly and permit to send a signal by a regular communication protocol and feed basic functions like temperature measurement or airflow sensing.

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“…A further step with this micro device is to fabricate a micro thermoelectric generator in which the active thermoelectric material is the thin silicon suspended membrane, which can be tuned from ntype to p-type with appropriate dopants. The first prototype of such generator (with a suspended membrane of 500 × 500 μm 2 ) gave a power output of 4.5 μW/cm 2 under a 5.5 K temperature difference, 44 and it is fully compatible with CMOS technologies. Similar silicon membranes were also studied with asynchronous optical sampling to investigate the decay times of the confined coherent phonons.…”

mentioning

confidence: 99%

Review—Towards the Next Generation of Thermoelectric Materials: Tailoring Electronic and Phononic Properties of Nanomaterials

Caballero-Calero

D’Agosta

2017

ECS J. Solid State Sci. Technol.

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In this review article we present the most relevant outcomes of the joint project “Tailoring Electronic and Phononic Properties of Nanomaterials: Towards Improved Thermoelectricity (nanoTHERM)”, a Spanish research Consolider project focused on the understanding of the thermoelectric materials and the tailoring of both their electronic and phononic properties toward the optimization of the efficiency of thermoelectric devices working at low and high temperatures.

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Micropower thermoelectric generator from thin Si membranes

Cited by 60 publications

References 19 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

Network of thermoelectric nanogenerators for low power energy harvesting

Review—Towards the Next Generation of Thermoelectric Materials: Tailoring Electronic and Phononic Properties of Nanomaterials

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