尽管硫族化合物作为传统的热电材料已经得到了广泛的研究，但寻找一种具有高电导率和低热导率的合适材料仍然是一个挑战。在这项工作中，我们介绍了一类新的热电材料，锗基无机卤化物钙钛矿\ce{CsGeX3}（X = I，Br，Cl），这已经被认为是一个有前途的候选人的光伏应用。通过晶格动力学计算和Boltzmann输运方程的求解，我们发现这些钙钛矿具有低于0.18 W m $^{-1}$ K $^{-1}$的超低热导率，而具有高于860 cm $^2$ V $^{-1}$ s $^{-1}$的非常高的载流子迁移率，这远远优于传统的硫属化合物的热电性。这些结果为寻找高性能、低成本的无机卤化物钙钛矿基热电材料指明了方向。
英文摘要：
In spite of intensive studies on the chalcogenides as conventional thermoelectrics, it remains a challenge to find a proper material with high electrical but low thermal conductivities. In this work, we introduced a new class of thermoelectrics, Ge-based inorganic halide perovskites \ce{CsGeX3} (X = I, Br, Cl), which were already known as a promising candidate for photovoltaic applications. By performing the lattice-dynamics calculations and solving the Boltzmann transport equation, we revealed that these perovskites have ultralow thermal conductivities below 0.18 W m$^{-1}$ K$^{-1}$ while very high carrier mobilities above 860 cm$^2$ V$^{-1}$ s$^{-1}$, being much superior to the conventional thermoelectrics of chalcogenides. These results highlight the way of searching high-performance and low-cost thermoelectrics based on inorganic halide perovskites.
Tailoring the Optoelectronic, Photocatalytic, Thermoelectric and Thermodynamic Properties of Halides Li2InBiX6 (X = Cl, Br, I) for Energy Conversion: A DFT Study
Princess Nourah Bint Abdulrahman University（公主诺拉·宾特·阿卜杜勒拉赫曼大学）；University of West Bohemia（西波希米亚大学）；University of Sargodha（萨尔戈达大学）；King Saud University（沙特国王大学）；Gachon University（迦南大学）
Distorted polyhedral architecture enabled high thermoelectric performance of columnar double halide perovskites Cs2AgPdCl5 and Cs2AgPtCl5
Jamia Millia Islamia（贾米阿米利娅伊斯兰大学）；Govt Naveen College（政府纳文学院）；Indian Institute of Technology, Jodhpur（印度理工学院乔德普尔分校）；University of Ulsan（蔚山大学）；Mody University of Science and Technology（莫迪科学与技术大学）
DFT aided prediction of phase stability, optoelectronic and thermoelectric properties of A2AuScX6 (A= Cs, Rb; X= Cl, Br, I) double perovskites for energy harvesting technology
First-Principles Study of Novel Lead-Free Double Perovskite \b{eta}2SnGeX6 (\b{eta} = K, Rb; X = Cl, Br, I) for thermomechanical, optoelectronic and outstanding thermoelectric applications
Synergistic effect of the electronic band delocalization and bond anharmonicity on the thermoelectric performance of Cs2TeX6(X=Cl, Br, I)
Jamia Millia Islamia（贾米亚米利娅伊斯兰大学）；Govt Naveen College（政府纳文学院）；Mody University of Science and Technology（莫迪科学与技术大学）；Indian Institute of Technology, Jodhpur（印度理工学院焦特普尔分校）；Sharda University（沙尔达大学）
