Karbaschi Hossein, Nouri Nafise, Rezaei Mohsen, Rashedi Gholamreza
Department of Physics, University of Isfahan, Isfahan 81746-73441, Iran.
Nanotechnology. 2020 Sep 11;31(37):375403. doi: 10.1088/1361-6528/ab946f. Epub 2020 May 19.
The thermoelectric power generation efficiency of a bismuth monolayer nanoribbon has been studied theoretically. We calculate the conductance of such a structure using the multi-orbital tight-binding model and also recursive Green's function method, in the presence of a substrate and on-site potential. For the case of the [Formula: see text] substrate-supported bismuth nanoribbon and by proper selection of on-site potential, a boxcar shape conductance in terms of energy has been obtained. Using the Landauer-Büttiker formalism in the non-linear response regime, we calculate heat and charge currents at low temperatures. By calculation of the electrical output power and power conversion thermoelectric efficiency, we have illustrated that such a structure can operate at high thermoelectric efficiency and also a considerable power generation rate.
已从理论上研究了铋单层纳米带的热电发电效率。我们使用多轨道紧束缚模型以及递归格林函数方法，在存在衬底和在位势的情况下，计算了这种结构的电导。对于[公式：见原文]衬底支撑的铋纳米带的情况，通过适当选择在位势，获得了能量方面的方波形状电导。在非线性响应区域使用朗道尔 - 布蒂克尔形式，我们计算了低温下的热电流和电荷电流。通过计算电输出功率和功率转换热电效率，我们表明这种结构可以在高热电效率以及可观的发电速率下运行。
