Interfacial Reconstruction Enables Enhanced Thermoelectric Performance in Bismuth Telluride-Based Alloys.
- 1ARC Research Hub in Zero-Emission Power Generation for Carbon Neutrality, Centre for Materials Science, and School of Chemistry and Physics, Queensland University of Technology, Brisbane, Queensland, Australia.
- 2Central Analytical Research Facility, Institute for Future Environments, Queensland University of Technology, Brisbane, Queensland, Australia.
Abstract
Bismuth telluride-based alloys are the benchmark thermoelectric materials for near-room-temperature power generation and solid-state cooling, yet further performance improvements through conventional optimization strategies remain challenging. Here, we introduce an interfacial reconstruction strategy by incorporating SnSe into Bi0.4Sb1.6Te₃. Interdiffusion and chemical reconstruction at the Bi0.4Sb1.6Te₃/SnSe heterointerfaces synergistically regulate charge-carrier transport and phonon scattering. As a result, the optimized composite achieves a peak dimensionless figure of merit (ZT) of ∼1.38 at 363 K and an average ZT of ∼1.25 across 303-423 K. Moreover, a single-leg thermoelectric device fabricated from this material delivers an energy conversion efficiency of ∼6.47% under a temperature difference of 200 K. These results establish interfacial reconstruction as a simple and effective approach to improving the thermoelectric performance of bismuth telluride-based alloys.
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BibTeX
@article{chen2026interfacial,
title = {{Interfacial Reconstruction Enables Enhanced Thermoelectric Performance in Bismuth Telluride-Based Alloys.}},
author = {Wenyi Chen and Xiao-Lei Shi and Meng Li and Chao Zhang and Konstantin Faershteyn and Siqi Liu and Yongqi Chen and Chengjiong He and Wanyu Lyu and Jun Pei and Nanhai Li and Zhi-Gang Chen},
journal = {Advanced science (Weinheim, Baden-Wurttemberg, Germany)},
year = {2026},
month = oct,
doi = {10.1002/advs.78266},
url = {https://europepmc.org/article/MED/42881362},
note = {CC BY},
}
RIS
TY - JOUR
TI - Interfacial Reconstruction Enables Enhanced Thermoelectric Performance in Bismuth Telluride-Based Alloys.
AU - Wenyi Chen
AU - Xiao-Lei Shi
AU - Meng Li
AU - Chao Zhang
AU - Konstantin Faershteyn
AU - Siqi Liu
AU - Yongqi Chen
AU - Chengjiong He
AU - Wanyu Lyu
AU - Jun Pei
AU - Nanhai Li
AU - Zhi-Gang Chen
PY - 2026
DA - 2026/10/15
JO - Advanced science (Weinheim, Baden-Wurttemberg, Germany)
DO - 10.1002/advs.78266
UR - https://europepmc.org/article/MED/42881362
AB - Bismuth telluride-based alloys are the benchmark thermoelectric materials for near-room-temperature power generation and solid-state cooling, yet further performance improvements through conventional optimization strategies remain challenging. Here, we introduce an interfacial reconstruction strategy by incorporating SnSe into Bi0.4Sb1.6Te₃. Interdiffusion and chemical reconstruction at the Bi0.4Sb1.6Te₃/SnSe heterointerfaces synergistically regulate charge-carrier transport and phonon scattering. As a result, the optimized composite achieves a peak dimensionless figure of merit (ZT) of ∼1.38 at 363 K and an average ZT of ∼1.25 across 303-423 K. Moreover, a single-leg thermoelectric device fabricated from this material delivers an energy conversion efficiency of ∼6.47% under a temperature difference of 200 K. These results establish interfacial reconstruction as a simple and effective approach to improving the thermoelectric performance of bismuth telluride-based alloys.
SN - 2198-3844
ER -