▎ 摘　　要

The room-temperature thermoelectric properties of semiconducting graphene nanoribbons (GNRs) with edge disorder were computationally investigated. The thermoelectric power factor (PF) of edge disordered GNRs (ED-GNRs) can be maximized by adjusting the ribbon length, L-g. For example, the PF of armchair-type ED-GNRs with an edge disorder concentration C-d of 5% has a maximum value of 16.2 mW/(m K-2) at L-g = 146 nm and a chemical potential mu of -0.6 eV. The appearance of the maximum PF can be understood by a crossover phenomenon where electric conduction in an ED-GNR gradually changes from ballistic transport to Anderson localization as Lg increases. In addition, Mott's formula, which is well known as the relation between the Seebeck coefficient and electrical conductance, could not be applied to ED-GNRs within the Anderson localization regime. (C) 2016 Elsevier B.V. All rights reserved.