Roadmap on thermoelectricity

Artini, Cristina; Pennelli, Giovanni; Graziosi, Patrizio; Li, Zhen; Neophytou, Neophytos; Melis, Claudio; Colombo, Luciano; Isotta, Eleonora; Lohani, Ketan; Scardi, Paolo; Castellero, Alberto; Baricco, Marcello; Palumbo, Mauro; Casassa, Silvia; Maschio, Lorenzo; Pani, M.; Latronico, Giovanna; Mele, Paolo; Benedetto, Francesca Di; Contento, Gaetano; Riccardis, M.F. De; Fucci, R.; Palazzo, Barbara; Rizzo, A.; Demontis, Valeria; Prete, Domenic; Isram, Muhammad; Rossella, Francesco; Ferrario, A.; Miozzo, A.; Boldrini, Stefano; Dimaggio, Elisabetta; Franzini, Marcello; Galliano, S.; Barolo, Claudia; Mardi, Saeed; Reale, Andrea; Lorenzi, Bruno; Narducci, Dario; Trifiletti, Vanira; Milita, Silvia; Bellucci, A.; Trucchi, Daniele M.

doi:10.1088/1361-6528/acca88

Cited by 11 publications

(9 citation statements)

References 247 publications

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“…4,5 For instance, much of the energy we produce as a society ends up as high-or low-grade waste heat, which could be recovered since a temperature difference can create electrical power by exploiting the physical phenomenon called thermoelectricity. 8 The thermoelectric conversion efficiency is related to the figure of merit zT = (S 2 σ)T/k of the thermoelectric material used (wherein T is the temperature, k and σ are the thermal and electrical conductivity, respectively, and S is the Seebeck coefficient). 9 Therefore, materials with low thermal conductivity and high Seebeck coefficient, or high thermal voltage, are good candidates for efficient thermoelectric applications.…”

Section: Introductionmentioning

confidence: 99%

Bismuth-Based Perovskite Derivates with Thermal Voltage Exceeding 40 mV/K

Trifiletti,

Massetti,

Calloni

et al. 2024

J. Phys. Chem. C

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Heat is an inexhaustible source of energy, and it can be exploited by thermoelectronics to produce electrical power or electrical responses. The search for a low-cost thermoelectric material that could achieve high efficiencies and can also be straightforwardly scalable has turned significant attention to the halide perovskite family. Here, we report the thermal voltage response of bismuth-based perovskite derivates and suggest a path to increase the electrical conductivity by applying chalcogenide doping. The films were produced by drop-casting or spin coating, and sulfur was introduced in the precursor solution using bismuth triethylxanthate. The physical–chemical analysis confirms the substitution. The sulfur introduction caused resistivity reduction by 2 orders of magnitude, and the thermal voltage exceeded 40 mV K–1 near 300 K in doped and undoped bismuth-based perovskite derivates. X-ray diffraction, Raman spectroscopy, and grazing-incidence wide-angle X-ray scattering were employed to confirm the structure. X-ray photoelectron spectroscopy, elemental analysis, scanning electron microscopy, and energy-dispersive X-ray spectroscopy were employed to study the composition and morphology of the produced thin films. UV–visible absorbance, photoluminescence, inverse photoemission, and ultraviolet photoelectron spectroscopies have been used to investigate the energy band gap.

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Section: Introductionmentioning

confidence: 99%

Bismuth-Based Perovskite Derivates with Thermal Voltage Exceeding 40 mV/K

Trifiletti,

Massetti,

Calloni

et al. 2024

J. Phys. Chem. C

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“…While the thermal conductivity was targeted by nanostructuring, which can effectively reduce κ l , the PF was targeted by the complex features that new materials exhibit in their electronic structure. 1,2 These electronic structures typically contain rich features such numerous valleys, 3 warped features, 4 resonant states, 3,5−7 narrow lower-dimensionality threads in three-dimensions (3D), 8 topological states, 9,10 and more (some are included in the descriptors and fitness functions used in machine learning studies). 11−15 Many of these features have been studied in detail in a research direction referred to as "bandstructure engineering", which targets novel transport features and PF enhancement.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Thermoelectric generators (TEGs) are solid-state devices that are able to convert the heat flow arising from temperature gradients directly into electricity. , They have the potential to offer a sustainable path for power harvesting and cooling across a variety of industries, including medical, wearable electronics, building monitoring, the Internet of things, refrigeration, thermal management, space missions, transportation, and many more. However, their large-scale exploitation has been limited by the high prices, toxicity, scarcity, and the low efficiencies of prominent thermoelectric (TE) materials.…”

Section: Introductionmentioning

confidence: 99%

The Role of Electronic Bandstructure Shape in Improving the Thermoelectric Power Factor of Complex Materials

Graziosi,

Neophytou

2023

ACS Appl. Electron. Mater.

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The large variety of complex electronic structure materials and their alloys offer highly promising directions for improvements in thermoelectric (TE) power factors (PFs). Their electronic structure contains rich features, referred to as "surface complexity", such as highly anisotropic, warped energy surface shapes with elongated features and threads in some cases. In this work, we use Boltzmann transport simulations to quantify the influence that the shape of the electronic structure energy surfaces has on the PF. Using analytical ellipsoidal bands, as well as realistic bands from a group of half-Heuslers, we show that band shape complexity alone can offer an advantage to the PF by ∼3× in realistic cases. However, the presence of anisotropic scattering mechanisms, such as ionized impurity or polar optical phonon scattering, can reduce these improvements by up to ∼50%. We show that expressions based on the simple ratio of the density of states effective mass to the conductivity effective mass, m DOS /m C , together with the number of valleys, can capture the anisotropy shape with a moderate to high degree of correlation. For this, we use a convenient way to extract these masses by mapping the complex bandstructures of materials to parabolic electronic structures, which can be done without the need for Boltzmann transport codes. Despite the fact that the PF depends on many parameters, information about the benefits of the band shape alone, may be very useful for identifying and understanding the performance of novel thermoelectric materials.

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“…Sustainable materials containing earth-abundant and low-cost elements are the most represented in the collection: among them, binary [1] and multinary [2] chalcogenides, skutterudites [3,4], half-Heusler phases [2,5] and silicides [6].…”

mentioning

confidence: 99%

“…A materials class of rising interest is the one of chalcogenides. In these, a multinary nature has been shown to be a promising strategy to suppress phonon transport [2]. Additionally, ab initio investigations on monolayer SnX 2 (X = S, Se) and Janus SnSSe, revealed that the symmetry breaking in the latter compound can lead to a strongly suppressed thermal conductivity, while maintaining good electronic properties.…”

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confidence: 99%