Enhanced thermoelectric performance in SnTe due to the energy filtering effect introduced by Bi2O3

Hong T, Guo C, Wang D, Qin B, Chang C, Gao X, Zhao LD. 2022. Enhanced thermoelectric performance in SnTe due to the energy filtering effect introduced by Bi2O3. Materials Today Energy. 25, 100985.

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Journal Article | Published | English

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Author
Hong, Tao; Guo, Changrong; Wang, Dongyang; Qin, Bingchao; Chang, ChengISTA ; Gao, Xiang; Zhao, Li Dong
Department
Abstract
SnTe is a promising Pb-free thermoelectric (TE) material with high electrical conductivity. We discovered the synergistic effect of Bi2O3 on enhancing the average power factor (PF) and overall ZT value of the SnTe-based thermoelectric material. The introduction of Bi2O3 forms plenty of SnO2, Bi2O3, and Bi-rich nanoprecipitates. These interfaces between the SnTe matrix and the nanoprecipitates can enhance the average PF through the energy filtering effect. On the other hand, abundant and diverse nanoprecipitates can significantly diminish the lattice thermal conductivity (κlat) through enhanced phonon scattering. The synergistic effect of Bi2O3 resulted in a maximum ZT (ZTmax) value of 0.9 at SnTe-2% Bi2O3 and an average ZT (ZTave) value of 0.4 for SnTe-4% Bi2O3 from 300 K to 823 K. The work provides an excellent reference to develop non-toxic high-performance TE materials.
Publishing Year
Date Published
2022-04-01
Journal Title
Materials Today Energy
Acknowledgement
This work was supported by National Natural Science Foundation of China (52002042), National Key Research and Development Program of China (2018YFA0702100 and 2018YFB0703600), 111 Project (B17002) and Lise Meitner Project M 2889-N. This work was also supported by the National Postdoctoral Program for Innovative Talents (BX20200028). L.D.Z. appreciates the support of the high-performance computing (HPC) resources at Beihang University, the National Science Fund for Distinguished Young Scholars (51925101), and center for High Pressure Science and Technology Advanced Research (HPSTAR) for SEM and TEM measurements.
Volume
25
Article Number
100985
eISSN
IST-REx-ID

Cite this

Hong T, Guo C, Wang D, et al. Enhanced thermoelectric performance in SnTe due to the energy filtering effect introduced by Bi2O3. Materials Today Energy. 2022;25. doi:10.1016/j.mtener.2022.100985
Hong, T., Guo, C., Wang, D., Qin, B., Chang, C., Gao, X., & Zhao, L. D. (2022). Enhanced thermoelectric performance in SnTe due to the energy filtering effect introduced by Bi2O3. Materials Today Energy. Elsevier. https://doi.org/10.1016/j.mtener.2022.100985
Hong, Tao, Changrong Guo, Dongyang Wang, Bingchao Qin, Cheng Chang, Xiang Gao, and Li Dong Zhao. “Enhanced Thermoelectric Performance in SnTe Due to the Energy Filtering Effect Introduced by Bi2O3.” Materials Today Energy. Elsevier, 2022. https://doi.org/10.1016/j.mtener.2022.100985.
T. Hong et al., “Enhanced thermoelectric performance in SnTe due to the energy filtering effect introduced by Bi2O3,” Materials Today Energy, vol. 25. Elsevier, 2022.
Hong T, Guo C, Wang D, Qin B, Chang C, Gao X, Zhao LD. 2022. Enhanced thermoelectric performance in SnTe due to the energy filtering effect introduced by Bi2O3. Materials Today Energy. 25, 100985.
Hong, Tao, et al. “Enhanced Thermoelectric Performance in SnTe Due to the Energy Filtering Effect Introduced by Bi2O3.” Materials Today Energy, vol. 25, 100985, Elsevier, 2022, doi:10.1016/j.mtener.2022.100985.

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