Thermoelectric Properties of Armchair Graphene Nanoribbons with Array Characteristics

Overview

Journal RSC Adv

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2024 Jan 23

PMID 38259995

Authors

David M T Kuo

Affiliations

Soon will be listed here.

Abstract

The thermoelectric properties of armchair graphene nanoribbons (AGNRs) with array characteristics are investigated theoretically using the tight-binding model and Green's function technique. The AGNR structures with array characteristics are created by embedding a narrow boron nitride nanoribbon (BNNR) into a wider AGNR, resulting in two narrow AGNRs. This system is denoted as -AGNR/-BNNR, where '' and '' represent the widths of the wider AGNR and narrow BNNR, respectively. We elucidate the coupling effect between two narrow symmetrical AGNRs on the electronic structure of -AGNR/-BNNR. A notable discovery is that the power factor of the 15-AGNR/5-BNNR with the minimum width surpasses the quantum limitation of power factor for 1D ideal systems. The energy level degeneracy observed in the first subbands of -AGNR/-BNNR structures proves to be highly advantageous in enhancing the electrical power outputs of graphene nanoribbon devices.

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