Journal ArticleDOI
High Thermoelectric Performance in Electron-Doped AgBi3S5 with Ultralow Thermal Conductivity
TLDR
In this paper, the authors reported electron-doped AgBi3S5 as a new high-performance nontoxic thermoelectric material, which is attributed to its unusual vibrational properties: double rattling phonon modes associated with Ag and Bi atoms.Abstract:
We report electron-doped AgBi3S5 as a new high-performance nontoxic thermoelectric material. This compound features exceptionally low lattice thermal conductivities of 0.5–0.3 W m–1 K–1 in the temperature range of 300–800 K, which is ascribed to its unusual vibrational properties: “double rattling” phonon modes associated with Ag and Bi atoms. Chlorine doping at anion sites acts as an efficient electron donor, significantly enhancing the electrical properties of AgBi3S5. In the carrier concentration range (5 × 1018–2 × 1019 cm–3) investigated in this study, the trends in Seebeck coefficient can be reasonably understood using a single parabolic band model with the electron effective mass of 0.22 me (me is the free electron mass). Samples of 0.33% Cl-doped AgBi3S5 prepared by spark plasma sintering show a thermoelectric figure of merit of ∼1.0 at 800 K.read more
Citations
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Journal ArticleDOI
Thermoelectrics: From history, a window to the future
Davide Beretta,Davide Beretta,Neophytos Neophytou,James M. Hodges,Mercouri G. Kanatzidis,Dario Narducci,Marisol Martin Gonzalez,Matt Beekman,Benjamin Balke,Giacomo Cerretti,Wolfgang Tremel,Alexandra Zevalkink,Anna I. Hofmann,Christian Müller,Bernhard Dörling,Mariano Campoy-Quiles,Mario Caironi +16 more
TL;DR: A broad review of thermoelectric materials can be found in this article, where the authors discuss the major steps in the history of thermophysics, from the very early discovery to present technology.
Journal ArticleDOI
Anharmoncity and low thermal conductivity in thermoelectrics
Cheng Chang,Li-Dong Zhao +1 more
TL;DR: In this article, the relationship between anharmonicity and low thermal conductivity in thermoelectrics is discussed, and several strategies which yield anharmony are also suggested, including lone pair electron, resonant bonding and rattling model.
Journal ArticleDOI
High Thermoelectric Performance in SnTe–AgSbTe2 Alloys from Lattice Softening, Giant Phonon–Vacancy Scattering, and Valence Band Convergence
Gangjian Tan,Shiqiang Hao,Riley Hanus,Xiaomi Zhang,Shashwat Anand,Trevor P. Bailey,Alexander J. E. Rettie,Xianli Su,Xianli Su,Ctirad Uher,Vinayak P. Dravid,G. Jeffrey Snyder,Chris Wolverton,Mercouri G. Kanatzidis,Mercouri G. Kanatzidis +14 more
TL;DR: In this article, the authors report on the underlying mechanism that enables the SnTe-AgSbTe2 system to exhibit superior thermoelectric figure of merit (ZT) compared to its parent compound SnTe.
Journal ArticleDOI
Crystalline Solids with Intrinsically Low Lattice Thermal Conductivity for Thermoelectric Energy Conversion
Manoj K. Jana,Kanishka Biswas +1 more
TL;DR: In this paper, the correlations between chemical bonding and lattice dynamics in specific materials and the ensuing characteristics underpinning an intrinsically low thermal conductivity (κL) therein, viz., lattice anharmonicity, resonant bonding, intrinsic rattling, part-liquid states, and order-disorder transitions.
Journal ArticleDOI
Soft phonon modes from off-center Ge atoms lead to ultralow thermal conductivity and superior thermoelectric performance in n-type PbSe–GeSe
Zhong-Zhen Luo,Zhong-Zhen Luo,Shiqiang Hao,Xiaomi Zhang,Xia Hua,Songting Cai,Gangjian Tan,Trevor P. Bailey,Runchu Ma,Ctirad Uher,Chris Wolverton,Vinayak P. Dravid,Qingyu Yan,Mercouri G. Kanatzidis +13 more
TL;DR: In this paper, the n-type GeSe-alloyed PbSe system achieves a peak figure of merit, ZT, of ∼1.54 at 773 K and maintains ZT values above 1.2 over a broad temperature range from 623 K to 923 K.
References
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Journal ArticleDOI
Cooling, heating, generating power, and recovering waste heat with thermoelectric systems.
TL;DR: Thermoelectric materials are solid-state energy converters whose combination of thermal, electrical, and semiconductor properties allows them to be used to convert waste heat into electricity or electrical power directly into cooling and heating.
Journal ArticleDOI
Ultralow thermal conductivity and high thermoelectric figure of merit in SnSe crystals
Li-Dong Zhao,Shih Han Lo,Yongsheng Zhang,Hui Sun,Gangjian Tan,Ctirad Uher,Chris Wolverton,Vinayak P. Dravid,Mercouri G. Kanatzidis +8 more
TL;DR: An unprecedented ZT of 2.6 ± 0.3 at 923 K is reported in SnSe single crystals measured along the b axis of the room-temperature orthorhombic unit cell, which highlights alternative strategies to nanostructuring for achieving high thermoelectric performance.
Journal ArticleDOI
High-performance bulk thermoelectrics with all-scale hierarchical architectures
Kanishka Biswas,Jiaqing He,Ivan Blum,Ivan Blum,Chun I. Wu,Timothy P. Hogan,Timothy P. Hogan,David N. Seidman,Vinayak P. Dravid,Mercouri G. Kanatzidis,Mercouri G. Kanatzidis +10 more
TL;DR: It is shown that heat-carrying phonons with long mean free paths can be scattered by controlling and fine-tuning the mesoscale architecture of nanostructured thermoelectric materials, and an increase in ZT beyond the threshold of 2 highlights the role of, and need for, multiscale hierarchical architecture in controlling phonon scattering in bulk thermoeLECTrics.
Journal ArticleDOI
Enhancement of Thermoelectric Efficiency in PbTe by Distortion of the Electronic Density of States
Joseph P. Heremans,Vladimir Jovovic,Eric S. Toberer,Ali Saramat,Ken Kurosaki,Anek Charoenphakdee,Shinsuke Yamanaka,G. Jeffrey Snyder +7 more
TL;DR: A successful implementation through the use of the thallium impurity levels in lead telluride (PbTe) is reported, which results in a doubling of zT in p-type PbTe to above 1.5 at 773 kelvin.
Journal ArticleDOI
Convergence of electronic bands for high performance bulk thermoelectrics
TL;DR: It is demonstrated that it is possible to direct the convergence of many valleys in a bulk material by tuning the doping and composition, leading to an extraordinary zT value of 1.8 at about 850 kelvin.