What question did this study set out to answer?

To optimize the thermoelectric properties of bismuth antimony telluride alloys by suppressing intrinsic donor-like defect scattering and decoupling thermal and electrical transport.

November 24, 2024SmallOpen Access

Lattice Regularization by Manipulating Over‐Stoichiometric Defects Yields High‐Performance (Bi,Sb) 2 Te 3 Thermoelectrics

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Authors

RLRuyuan Li QPQiaoyan Pan QZQiang Zhang

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Overview

Experimental study demonstrates enhanced thermoelectric conversion efficiency in bismuth antimony telluride alloys, highlighting potential for low-grade waste heat recovery.

Key Points

To optimize the thermoelectric properties of bismuth antimony telluride alloys by suppressing intrinsic donor-like defect scattering and decoupling thermal and electrical transport.
Introduced over-stoichiometric antimony to fill tellurium vacancies and regulate antisite defect formation.
Applied dilute copper doping to induce microstructural modulation, yielding coherent antimony nanoprecipitates and high-density twin boundaries.
Fabricated and tested a 17-pair thermoelectric power generator module across a 200 K temperature gradient.
Microstructural tuning decoupled electrical and thermal transport, increasing the peak figure of merit (ZT) to approximately 1.50 at 350 K, with an average ZT of 1.25 between 300 K and 500 K.
The integrated 17-pair thermoelectric generator achieved an energy conversion efficiency of 6.7% under a 200 K temperature difference while maintaining operational stability.

Cite This Study

Li et al. (2024) studied this question.

synapsesocial.com/papers/6a760f651ee3153e8f613a30 https://doi.org/10.1002/smll.202408794

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November 24, 2024SmallOpen Access

Lattice Regularization by Manipulating Over‐Stoichiometric Defects Yields High‐Performance (Bi,Sb) 2 Te 3 Thermoelectrics

View Full Paper

Ask AI

Bookmark

Authors

RLRuyuan Li QPQiaoyan Pan QZQiang Zhang

Discussion

Member takes

Overview

Experimental study demonstrates enhanced thermoelectric conversion efficiency in bismuth antimony telluride alloys, highlighting potential for low-grade waste heat recovery.

Key Points

To optimize the thermoelectric properties of bismuth antimony telluride alloys by suppressing intrinsic donor-like defect scattering and decoupling thermal and electrical transport.
Introduced over-stoichiometric antimony to fill tellurium vacancies and regulate antisite defect formation.
Applied dilute copper doping to induce microstructural modulation, yielding coherent antimony nanoprecipitates and high-density twin boundaries.
Fabricated and tested a 17-pair thermoelectric power generator module across a 200 K temperature gradient.
Microstructural tuning decoupled electrical and thermal transport, increasing the peak figure of merit (ZT) to approximately 1.50 at 350 K, with an average ZT of 1.25 between 300 K and 500 K.
The integrated 17-pair thermoelectric generator achieved an energy conversion efficiency of 6.7% under a 200 K temperature difference while maintaining operational stability.

Cite This Study

Li et al. (2024) studied this question.

synapsesocial.com/papers/6a760f651ee3153e8f613a30 https://doi.org/10.1002/smll.202408794

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