Band engineering of high performance p-type FeNbSb based half-Heusler thermoelectric materials for figure of merit zT > 1

An outstanding figure-of-merit zT ≈ 1.06 at 600 K for p-type elemental Te thermoelectrics is realized by synergistically tuning their carrier and phonon transport behaviors via a multicomponent alloying strategy.

Download Full-text

Achieving high-performance p-type SmMg2Bi2 thermoelectric materials through band engineering and alloying effects

Journal of Materials Chemistry A ◽

10.1039/c9ta13224d ◽

2020 ◽

Vol 8 (31) ◽

pp. 15760-15766 ◽

Cited By ~ 1

Author(s):

Udara Saparamadu ◽

Xiaojian Tan ◽

Jifeng Sun ◽

Zhensong Ren ◽

Shaowei Song ◽

...

Keyword(s):

Power Generation ◽

Thermoelectric Materials ◽

High Performance ◽

Promising Material ◽

Band Engineering ◽

P Type ◽

Alloying Effects

P-type SmMg2Bi2, a new member of Bi-based 1-2-2 Zintl family, has been investigated and demonstrated to be a promising material for application in TE power generation.

Download Full-text

High-Thermoelectric Figure of Merit Realized in p-Type Half-Heusler Compounds: ZrCoSnxSb1-x

Japanese Journal of Applied Physics ◽

10.1143/jjap.46.l673 ◽

2007 ◽

Vol 46 (No. 27) ◽

pp. L673-L675 ◽

Cited By ~ 58

Author(s):

Takeyuki Sekimoto ◽

Ken Kurosaki ◽

Hiroaki Muta ◽

Shinsuke Yamanaka

Keyword(s):

Figure Of Merit ◽

Thermoelectric Figure Of Merit ◽

Heusler Compounds ◽

Thermoelectric Figure ◽

P Type

Download Full-text

Fabrication of Bi-Te Based Thermoelectric Semiconductors by Using Hybrid Powders

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.297-300.875 ◽

2005 ◽

Vol 297-300 ◽

pp. 875-880

Author(s):

Cheol Ho Lim ◽

Ki Tae Kim ◽

Yong Hwan Kim ◽

Dong Choul Cho ◽

Young Sup Lee ◽

...

Keyword(s):

Mechanical Properties ◽

Single Crystals ◽

Thermoelectric Properties ◽

Thermoelectric Materials ◽

Figure Of Merit ◽

Bending Strength ◽

Mixing Ratio ◽

Plasma Sintering ◽

Spark Plasma ◽

P Type

P-type Bi0.5Sb1.5Te3 compounds doped with 3wt% Te were fabricated by spark plasma sintering and their mechanical and thermoelectric properties were investigated. The sintered compounds with the bending strength of more than 50MPa and the figure-of-merit 2.9×10-3/K were obtained by controlling the mixing ratio of large powders (PL) and small powders (PS). Compared with the conventionally prepared single crystal thermoelectric materials, the bending strength was increased up to more than three times and the figure-of-merit Z was similar those of single crystals. It is expected that the mechanical properties could be improved by using hybrid powders without degradation of thermoelectric properties.

Download Full-text

Structure Design for High Performance n-Type Polymer Thermoelectric Materials

Chinese Physics B ◽

10.1088/1674-1056/ac3a64 ◽

2021 ◽

Author(s):

Qi Zhang ◽

Hengda Sun ◽

Meifang Zhu

Keyword(s):

Conjugated Polymers ◽

Thermoelectric Materials ◽

High Performance ◽

Waste Heat ◽

Building Blocks ◽

Structure Design ◽

Potential Candidate ◽

Polymer Backbone ◽

P Type ◽

Polymer Thermoelectric

Abstract Organic thermoelectric (OTE) materials have been regarded as a potential candidate to harvest waste heat from complex, low temperature surfaces of objects and convert it into electricity. Recently, n-type conjugated polymers as organic thermoelectric materials have aroused intensive research in order to improve their performance to match up with their p-type counterpart. In this review, we discuss aspects that affect the performance of n-type OTEs, and further focus on the effect of planarity of backbone on doping efficiency and eventually the TE performance. We then summarize strategies such as implementing rigid n-type polymer backbone or modifying conventional polymer building blocks for more planar conformation. In the outlook part, we conclude forementioned devotions and point out new possibility that may promote the future development of this field.

Download Full-text

High thermoelectric performance in low-cost SnS0.91Se0.09 crystals

Science ◽

10.1126/science.aax5123 ◽

2019 ◽

Vol 365 (6460) ◽

pp. 1418-1424 ◽

Cited By ~ 104

Author(s):

Wenke He ◽

Dongyang Wang ◽

Haijun Wu ◽

Yu Xiao ◽

Yang Zhang ◽

...

Keyword(s):

Thermoelectric Materials ◽

High Performance ◽

Carrier Mobility ◽

Figure Of Merit ◽

Toxic Elements ◽

Low Cost ◽

Thermoelectric Performance ◽

Tin Sulfide ◽

Temperature Dependent ◽

Earth Abundant

Thermoelectric technology allows conversion between heat and electricity. Many good thermoelectric materials contain rare or toxic elements, so developing low-cost and high-performance thermoelectric materials is warranted. Here, we report the temperature-dependent interplay of three separate electronic bands in hole-doped tin sulfide (SnS) crystals. This behavior leads to synergistic optimization between effective mass (m*) and carrier mobility (μ) and can be boosted through introducing selenium (Se). This enhanced the power factor from ~30 to ~53 microwatts per centimeter per square kelvin (μW cm−1 K−2 at 300 K), while lowering the thermal conductivity after Se alloying. As a result, we obtained a maximum figure of merit ZT (ZTmax) of ~1.6 at 873 K and an average ZT (ZTave) of ~1.25 at 300 to 873 K in SnS0.91Se0.09 crystals. Our strategy for band manipulation offers a different route for optimizing thermoelectric performance. The high-performance SnS crystals represent an important step toward low-cost, Earth-abundant, and environmentally friendly thermoelectrics.

Download Full-text

Band engineering and rational design of high-performance thermoelectric materials by first-principles

Journal of Materiomics ◽

10.1016/j.jmat.2016.05.004 ◽

2016 ◽

Vol 2 (2) ◽

pp. 114-130 ◽

Cited By ~ 17

Author(s):

Lili Xi ◽

Jiong Yang ◽

Lihua Wu ◽

Jihui Yang ◽

Wenqing Zhang

Keyword(s):

Thermoelectric Materials ◽

First Principles ◽

High Performance ◽

Rational Design ◽

Band Engineering

Download Full-text

LnPdSb (Ln=La,Gd): Promising intermetallics with large carrier mobility for high performance p-type thermoelectric materials

Applied Physics Letters ◽

10.1063/1.2339886 ◽

2006 ◽

Vol 89 (9) ◽

pp. 092108 ◽

Cited By ~ 13

Author(s):

Takeyuki Sekimoto ◽

Ken Kurosaki ◽

Hiroaki Muta ◽

Shinsuke Yamanaka

Keyword(s):

Thermoelectric Materials ◽

High Performance ◽

Carrier Mobility ◽

P Type

Download Full-text

Thermal Conductivity of Zn4−xCdxSb3 Solid Solutions

MRS Proceedings ◽

10.1557/proc-478-103 ◽

1997 ◽

Vol 478 ◽

Cited By ~ 20

Author(s):

T. Caillat ◽

A. Borshchevsky ◽

J. -P. Fleurial

Keyword(s):

Thermal Conductivity ◽

High Performance ◽

Figure Of Merit ◽

Lattice Thermal Conductivity ◽

State Of The Art ◽

Thermoelectric Figure Of Merit ◽

Thermoelectric Figure ◽

Jet Propulsion ◽

P Type ◽

Electrical Conductors

Abstractβ-Zn4Sb3 was recently identified at the Jet Propulsion Laboratory as a new high performance p-type thermoelectric material with a maximum dimensionless thermoelectric figure of merit ZT of 1.4 at a temperature of 673K. A usual approach, used for many state-of-the-art thermoelectric materials, to further improve ZT values is to alloy β-Zn4Sb3 with isostructural compounds because of the expected decrease in lattice thermal conductivity. We have grown Zn4−xCdxSb3 crystals with 0.2≤x<1.2 and measured their thermal conductivity from 10 to 500K. The thermal conductivity values of Zn4−xCdxSb3 alloys are significantly lower than those measured for β-Zn4Sb3 and are comparable to its calculated minimum thermal conductivity. A strong atomic disorder is believed to be primarily at the origin of the very low thermal conductivity of these materials which are also fairly good electrical conductors and are therefore excellent candidates for thermoelectric applications.

Download Full-text

Data analytics accelerates the experimental discovery of new thermoelectric materials with extremely high figure of merit

10.21203/rs.3.rs-926972/v1 ◽

2021 ◽

Author(s):

Sergey Levchenko ◽

Yaqiong Zhong ◽

Xiaojuan Hu ◽

Debalaya Sarker ◽

Qingrui Xia ◽

...

Keyword(s):

Thermoelectric Materials ◽

Figure Of Merit ◽

Large Scale ◽

Chemical Space ◽

Small Data ◽

Data Sets ◽

High Performing ◽

Learning Framework ◽

Small Data Sets ◽

P Type

Abstract Thermoelectric (TE) materials are among very few sustainable yet feasible energy solutions of present time. This huge promise of energy harvesting is contingent on identifying/designing materials having higher efficiency than presently available ones. However, due to the vastness of the chemical space of materials, only its small fraction was scanned experimentally and/or computationally so far. Employing a compressed-sensing based symbolic regression in an active-learning framework, we have not only identified a trend in materials’ compositions for superior TE performance, but have also predicted and experimentally synthesized several extremely high performing novel TE materials. Among these, we found polycrystalline p-type Cu0.45Ag0.55GaTe2 to possess an experimental figure of merit as high as ~2.8 at 827 K. This is a breakthrough in the field, because all previously known thermoelectric materials with a comparable figure of merit are either unstable or much more difficult to synthesize, rendering them unusable in large-scale applications. The presented methodology demonstrates the importance and tremendous potential of physically informed descriptors in material science, in particular for relatively small data sets typically available from experiments at well-controlled conditions.

Download Full-text