TY - JOUR
T1 - Optimized Electronic Bands and Ultralow Lattice Thermal Conductivity in Ag and y Codoped SnTe
AU - Xu, Wenjing
AU - Yang, Hengquan
AU - Liu, Chengyan
AU - Zhang, Zhongwei
AU - Chen, Chunguang
AU - Ye, Zhenyuan
AU - Lu, Zhao
AU - Wang, Xiaoyang
AU - Gao, Jie
AU - Chen, Junliang
AU - Xie, Zhengchuan
AU - Miao, Lei
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant Nos. 51801040, 51961011, and 51772056), Guangxi Natural Science Foundation of China (Grant Nos. 2020GXNSFAA159111, AD20159006, 2018GXNSFAA294135, 2018AD19085, and 2019GXNSFAA245039), the Innovation Project of GUET Graduate Education (2020YCXS109), the National Key Research and Development Program of China (No. 2017YFE0198000), Guangxi Science and Technology Project (Grant No. AD19245160), and Guangxi Key Laboratory of Information Materials (Grant No. 191012-K).
Publisher Copyright:
© 2021 American Chemical Society.
PY - 2021/7/21
Y1 - 2021/7/21
N2 - As a lead-free thermoelectric material, SnTe is inhibited by its inherent high carrier concentration and high thermal conductivity. This work describes the synergistic effect on the modulation of band structure and microstructural defects of SnTe by Ag and Y codoping, which gives rise to band convergence and multiple microstructural defects (secondary phases, dislocations, and boundaries) in the matrix and endows Sn0.94Ag0.09Y0.05Te with an increased power factor of ∼2485 μW m-1 K-2, an extremely low lattice thermal conductivity of ∼0.61 W m-1 K-1, and a peak zT as high as ∼1.2 at 873 K. This work reveals that the combination of Ag and Y could play a role in the synergistic optimization of electronic and phonon transport properties of SnTe by modifying the band structure and microstructures, providing guidance for enhancing the thermoelectric performance of the relevant materials.
AB - As a lead-free thermoelectric material, SnTe is inhibited by its inherent high carrier concentration and high thermal conductivity. This work describes the synergistic effect on the modulation of band structure and microstructural defects of SnTe by Ag and Y codoping, which gives rise to band convergence and multiple microstructural defects (secondary phases, dislocations, and boundaries) in the matrix and endows Sn0.94Ag0.09Y0.05Te with an increased power factor of ∼2485 μW m-1 K-2, an extremely low lattice thermal conductivity of ∼0.61 W m-1 K-1, and a peak zT as high as ∼1.2 at 873 K. This work reveals that the combination of Ag and Y could play a role in the synergistic optimization of electronic and phonon transport properties of SnTe by modifying the band structure and microstructures, providing guidance for enhancing the thermoelectric performance of the relevant materials.
KW - SnTe
KW - band structure
KW - low thermal conductivity
KW - microstructural defects
KW - thermoelectric material
UR - http://www.scopus.com/inward/record.url?scp=85111215017&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85111215017&partnerID=8YFLogxK
U2 - 10.1021/acsami.1c04326
DO - 10.1021/acsami.1c04326
M3 - Article
C2 - 34242005
AN - SCOPUS:85111215017
SN - 1944-8244
VL - 13
SP - 32876
EP - 32885
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
IS - 28
ER -