Journal Article10.1021/JA208658W
High Performance Thermoelectrics from Earth-Abundant Materials: Enhanced Figure of Merit in PbS by Second Phase Nanostructures
Li-Dong Zhao,Shih Han Lo,Jiaqing He,Hao Li,Kanishka Biswas,John Androulakis,Chun I. Wu,Timothy P. Hogan,Duck Young Chung,Vinayak P. Dravid,Mercouri G. Kanatzidis +10 more
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TL;DR: Doping studies show that the power factor maximum for pure n-type PbS can be raised substantially to ~12 μW cm(-1) K(-2) at >723 K using 1.0 mol % PbCl(2) as the electron donor dopant, and the lattice thermal conductivity of Pb S can be greatly reduced by adding selected metal sulfide phases.
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Abstract: Lead sulfide, a compound consisting of elements with high natural abundance, can be converted into an excellent thermoelectric material. We report extensive doping studies, which show that the power factor maximum for pure n-type PbS can be raised substantially to ∼12 μW cm–1 K–2 at >723 K using 1.0 mol % PbCl2 as the electron donor dopant. We also report that the lattice thermal conductivity of PbS can be greatly reduced by adding selected metal sulfide phases. The thermal conductivity at 723 K can be reduced by ∼50%, 52%, 30%, and 42% through introduction of up to 5.0 mol % Bi2S3, Sb2S3, SrS, and CaS, respectively. These phases form as nanoscale precipitates in the PbS matrix, as confirmed by transmission electron microscopy (TEM), and the experimental results show that they cause huge phonon scattering. As a consequence of this nanostructuring, ZT values as high as 0.8 and 0.78 at 723 K can be obtained for nominal bulk PbS material. When processed with spark plasma sintering, PbS samples with 1.0 mol %...
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Citations
Prediction of NbXGe (X = Rh, Ir) Half-Heusler Semiconducting Compounds with Promising Thermoelectric Property Using 18-Electron Rule
Wang Yafan,Li Jia,Wang Jiaxi,He Fuli,Xu Xiuting,Liu Yang,Yin Fuxing +6 more
TL;DR: This study predicts promising thermoelectric properties in NbXGe (X = Rh, Ir) half-Heusler compounds using the 18-electron rule, achieving high ZT values through lattice strains and special quasi-random structures, making them suitable thermoelectric candidate materials.
Ultrahigh Power Factor in Thermoelectric System Nb0.95M0.05FeSb (M = Hf, Zr, and Ti).
Wuyang Ren,Wuyang Ren,Hangtian Zhu,Qing Zhu,Udara Saparamadu,Ran He,Zihang Liu,Jun Mao,Chao Wang,Kornelius Nielsch,Zhiming Wang,Zhifeng Ren +11 more
TL;DR: It is found that Hf dopant is capable to simultaneously supply carriers for mobility optimization and introduce atomic disorder for reducing lattice thermal conductivity in Nb0.95Hf0.05FeSb, showing the realistic prospect of the ultrahigh PF for power generation.
The Fragility of Thermoelectric Power Factor in Cross-Plane Superlattices in the Presence of Nonidealities: A Quantum Transport Simulation Approach
TL;DR: In this paper, a quantum-mechanical simulation based on the nonequilibrium Green's function method was used to evaluate the Seebeck coefficient and power factor of cross-plane superlattices.
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TL;DR: In this paper, a high performance and robust Sb2Te3-based alloys operating above 550 K is revealed, where nanograins and nanotwins are constructed by high energy ball milling and some boron particles are added to impede the boundary softening caused by the grain refinement.
First-principles calculations and high thermoelectric performance of La–Nb doped SrTiO 3 ceramics
Yan Li,Qing Yu Hou,Xiao Huan Wang,Huijun Kang,Xinba Yaer,Jian-Bo Li,Tongmin Wang,Lei Miao,Jun Wang +8 more
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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.
3.9K
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.
3.3K