High intrinsic $ZT$ in InP$_3$ monolayer at room temperature

26 Sep 2018  ·  Zhang Shenghui, Niu Xiaobin, Xie Yiqun, Gong Kui, Shao Hezhu, Hu Yibin, Wang Yin ·

Two-dimensional thermoelectric materials with a figure of merit $ZT$, which is greater than 2.0 at room temperature, would be highly desirable in energy conversion since the efficiency is competitive to conventional energy conversion techniques. Here, we propose that the indium triphosphide (InP$_3$) monolayer offers an extraordinary $ZT$ of 2.2 at 300 K by using quantum calculations within the ballistic thermal transport region. A remarkably low and isotropic phononic thermal conductivity is founded, which is due to flat lattice vibration modes. This low thermal conductivity takes a major responsibility to the impressively high $ZT$. Moreover, a large $ZT$ that is greater than 1.5 can be maintained, even if a 1% mechanic extension is applied on the lattice. These results suggest that the InP$_3$ monolayer is a promising candidate for low dimensional thermoelectric applications.

PDF Abstract
No code implementations yet. Submit your code now

Categories


Materials Science Mesoscale and Nanoscale Physics