Enhanced thermoelectric performance in inorganic CsSnI3 perovskite by doping with PbI2

Sheng Yu; Feng Qian; Mingyu Hu; Zhenhua Ge; Jing Feng; Xiaoyu Chong

doi:10.1016/j.matlet.2021.131127

Enhanced thermoelectric performance in inorganic CsSnI₃ perovskite by doping with PbI₂

Sheng Yu, Feng Qian, Mingyu Hu^*, Zhenhua Ge, Jing Feng, Xiaoyu Chong

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Journal article › peer-review

11 Citations (Scopus)

Abstract

The inorganic halide perovskite CsSnI₃ has attracted significant attention for use as a thermoelectric material owing to its ultralow thermal conductivity and unique electrical properties. In this study, we report lead iodide (PbI₂) doping to optimize the thermoelectric performance of bulk CsSnI₃. The addition of a small amount of PbI₂ narrowed the bandgap of CsSnI₃ and modulated its carrier concentration, improving the electrical conductivity of CsSnI₃. Moreover, the lattice distortion caused by PbI₂ doping led to a significant decrease in the lattice thermal conductivity of CsSnI₃. Finally, the thermoelectric performance was enhanced, and the highest ZT value attained was 0.14 at 523 K.

Original language	English
Article number	131127
Journal	Materials Letters
Volume	308, Part A
Early online date	23 Oct 2021
DOIs	https://doi.org/10.1016/j.matlet.2021.131127
Publication status	Published - Feb 2022

Scopus Subject Areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

User-Defined Keywords

Electrical properties
Inorganic halide perovskite
Thermal conductivity
Thermoelectric performance

Access to Document

10.1016/j.matlet.2021.131127

Cite this

@article{3f9a85356ff4459e9d61c4c1a8fba7c8,

title = "Enhanced thermoelectric performance in inorganic CsSnI3 perovskite by doping with PbI2",

abstract = "The inorganic halide perovskite CsSnI3 has attracted significant attention for use as a thermoelectric material owing to its ultralow thermal conductivity and unique electrical properties. In this study, we report lead iodide (PbI2) doping to optimize the thermoelectric performance of bulk CsSnI3. The addition of a small amount of PbI2 narrowed the bandgap of CsSnI3 and modulated its carrier concentration, improving the electrical conductivity of CsSnI3. Moreover, the lattice distortion caused by PbI2 doping led to a significant decrease in the lattice thermal conductivity of CsSnI3. Finally, the thermoelectric performance was enhanced, and the highest ZT value attained was 0.14 at 523 K.",

keywords = "Electrical properties, Inorganic halide perovskite, Thermal conductivity, Thermoelectric performance",

author = "Sheng Yu and Feng Qian and Mingyu Hu and Zhenhua Ge and Jing Feng and Xiaoyu Chong",

note = "Funding Information: This work was supported by the National Key R&D Program of China (No. 2019YFB1503200). M. Hu acknowledges the support from China Postdoctoral Science Foundation (No. 2021M690193). Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2022",

month = feb,

doi = "10.1016/j.matlet.2021.131127",

language = "English",

volume = "308, Part A",

journal = "Materials Letters",

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TY - JOUR

T1 - Enhanced thermoelectric performance in inorganic CsSnI3 perovskite by doping with PbI2

AU - Yu, Sheng

AU - Qian, Feng

AU - Hu, Mingyu

AU - Ge, Zhenhua

AU - Feng, Jing

AU - Chong, Xiaoyu

N1 - Funding Information: This work was supported by the National Key R&D Program of China (No. 2019YFB1503200). M. Hu acknowledges the support from China Postdoctoral Science Foundation (No. 2021M690193). Publisher Copyright: © 2021 Elsevier B.V.

PY - 2022/2

Y1 - 2022/2

N2 - The inorganic halide perovskite CsSnI3 has attracted significant attention for use as a thermoelectric material owing to its ultralow thermal conductivity and unique electrical properties. In this study, we report lead iodide (PbI2) doping to optimize the thermoelectric performance of bulk CsSnI3. The addition of a small amount of PbI2 narrowed the bandgap of CsSnI3 and modulated its carrier concentration, improving the electrical conductivity of CsSnI3. Moreover, the lattice distortion caused by PbI2 doping led to a significant decrease in the lattice thermal conductivity of CsSnI3. Finally, the thermoelectric performance was enhanced, and the highest ZT value attained was 0.14 at 523 K.

AB - The inorganic halide perovskite CsSnI3 has attracted significant attention for use as a thermoelectric material owing to its ultralow thermal conductivity and unique electrical properties. In this study, we report lead iodide (PbI2) doping to optimize the thermoelectric performance of bulk CsSnI3. The addition of a small amount of PbI2 narrowed the bandgap of CsSnI3 and modulated its carrier concentration, improving the electrical conductivity of CsSnI3. Moreover, the lattice distortion caused by PbI2 doping led to a significant decrease in the lattice thermal conductivity of CsSnI3. Finally, the thermoelectric performance was enhanced, and the highest ZT value attained was 0.14 at 523 K.

KW - Electrical properties

KW - Inorganic halide perovskite

KW - Thermal conductivity

KW - Thermoelectric performance

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DO - 10.1016/j.matlet.2021.131127

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VL - 308, Part A

JO - Materials Letters

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