论文标题
基于GE的卤化物钙钛矿中热电特性的表现
Manifestation of the thermoelectric properties in Ge-based halide perovskites
论文作者
论文摘要
尽管对葡萄干剂作为常规热电学进行了深入的研究，但找到具有高电导量但低热导率的适当材料仍然是一个挑战。在这项工作中，我们引入了一类新的热电学，基于GE的无机卤化物钙钛矿\ ce {csgex3}（x = i，br，cl），它们已经被称为光伏应用的有前途的候选者。通过执行晶状体 - 动力学计算并求解Boltzmann传输方程，我们透露，这些钙质具有超低的热电导率低于0.18 W m $ $^{ - 1} $ k $^{ - 1} $，而高载流量高于860 cm $^2 $^2 $^2 $^$^$^$^$^$^$^$^ - s $} $^{ - s $} $}墨西哥盐的热电学。这些结果突出了基于无机卤化物钙钛矿搜索高性能和低成本热电学的方式。
In spite of intensive studies on the chalcogenides as conventional thermoelectrics, it remains a challenge to find a proper material with high electrical but low thermal conductivities. In this work, we introduced a new class of thermoelectrics, Ge-based inorganic halide perovskites \ce{CsGeX3} (X = I, Br, Cl), which were already known as a promising candidate for photovoltaic applications. By performing the lattice-dynamics calculations and solving the Boltzmann transport equation, we revealed that these perovskites have ultralow thermal conductivities below 0.18 W m$^{-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.
