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Integrating Band Structure Engineering with All-Scale Hierarchical Structuring for High Thermoelectric Performance in PbTe System

Journal Article · · Advanced Energy Materials
 [1];  [2];  [3];  [1];  [4];  [3];  [1];  [5];  [4];  [3];  [2];  [1]
  1. Beihang Univ., Beijing (China)
  2. Northwestern Univ., Evanston, IL (United States)
  3. South Univ. of Science and Technology of China, Shenzhen (China); Shenzhen Key Lab. of Thermoelectric Materials, Shenzhen (China)
  4. Tsinghua Univ., Beijing (China)
  5. Univ. of Hong Kong (Hong Kong)
+ Show Author Affiliations
We investigated PbTe1-xSex-2%Na-y%SrTe system and report a high ZT of 2.3 at 923 K for PbTe0.85Se0.15-2%Na-4%SrTe. This is achieved by performing electronic band structures modifications as well as all-scale hierarchical structuring and combining the two effects. We find that high ZTs in PbTe0.85Se0.15-2%Na-4%SrTe are possible at all temperature from 300K to 873K with an average ZTave of 1.23. The high performance in PbTe1-xSex-2%Na-y%SrTe could be achieved by either choosing PbTe-2Na-4SrTe or PbTe0.85Se0.15-2Na as a matrix. At room temperature the carrier mobility shows negligible variations as SrTe fraction is increased, however the lattice thermal conductivity is significantly reduced from ~ 1.1 Wm-1K-1 to ~ 0.82 Wm-1K-1 when 5.0 % SrTe is added. The lattice thermal conductivity at 923 K decreases from ~ 0.59 Wm-1K-1 to ~ 0.43 Wm-1K-1. The power factor maxima of PbTe1-xSex-2Na-4SrTe shift systematically to higher temperature with rising Se fractions due to bands divergence. The maximum power factors reach ~ 27 μWcm-1K-2, ~ 30 μWcm-1K-2, ~ 31 μWcm-1K-2 for the x = 0, 0.05, and 0.15 samples peak at 473K, 573K and 623K,
Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Revolutionary Materials for Solid State Energy Conversion (RMSSEC)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0001054
OSTI ID:
1397218
Alternate ID(s):
OSTI ID: 1400584
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 3 Vol. 7; ISSN 1614-6832
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Influence of Nanostructuration on PbTe Alloys Synthesized by Arc-Melting journal November 2019
Chalcogenide Thermoelectrics Empowered by an Unconventional Bonding Mechanism journal August 2019
Cu Intercalation and Br Doping to Thermoelectric SnSe 2 Lead to Ultrahigh Electron Mobility and Temperature‐Independent Power Factor journal December 2019
Promising Thermoelectric Bulk Materials with 2D Structures journal July 2017
Extraordinary Thermoelectric Performance Realized in n-Type PbTe through Multiphase Nanostructure Engineering journal August 2017
High‐Performance Thermoelectric SnSe: Aqueous Synthesis, Innovations, and Challenges journal February 2020
Comprehensive Investigation on the Thermoelectric Properties of p‐Type PbTe‐PbSe‐PbS Alloys journal September 2019
High Performance Thermoelectric Materials: Progress and Their Applications journal November 2017
Simultaneous Boost of Power Factor and Figure‐of‐Merit in In–Cu Codoped SnTe journal July 2019
Thermoelectric performance of SnTe alloys with In and Sb co-doped near critical solubility limit journal March 2019
State-of-the-Art Reviews and Analyses of Emerging Research Findings and Achievements of Thermoelectric Materials over the Past Years journal December 2018
Large enhancement of thermoelectric properties in n-type PbTe via dual-site point defects journal January 2017
Fabrication of one-dimensional Cu 2 Te/Te nanorod composites and their enhanced thermoelectric properties journal January 2019
Low thermal conductivity and high figure of merit for rapidly synthesized n-type Pb 1−x Bi x Te alloys journal January 2018
Realizing high performance n-type PbTe by synergistically optimizing effective mass and carrier mobility and suppressing bipolar thermal conductivity journal January 2018
Large enhancement of electrical transport properties of SnS in the out-of-plane direction by n-type doping: a combined ARPES and DFT study journal January 2018
Atomic-scale tuning of oxygen-doped Bi 2 Te 2.7 Se 0.3 to simultaneously enhance the Seebeck coefficient and electrical conductivity journal January 2020
Local nanostructures enhanced the thermoelectric performance of n-type PbTe journal January 2019
Understanding the effects of iodine doping on the thermoelectric performance of n-type PbTe ingot materials journal July 2019
Recent advances in non-Pb-based group-IV chalcogenides for environmentally-friendly thermoelectric materials journal April 2018
The enhanced thermoelectric properties of BiMnO 3 ceramics by Sr-doped journal April 2018
Chalcogenide Thermoelectrics Empowered by an Unconventional Bonding Mechanism text January 2019

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36 MATERIALS SCIENCE