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Transport and thermoelectric properties of finite textured graphenenanoribbons (t-GNRs) connected to electrodes with various coupling strengthsare theoretically studied in the framework of the tight-binding model andGreen's function approach. Due to quantum constriction induced by the indentededges, such t-GNRs behave like serially-coupled graphene quantum dots (SGQDs).These types of SGQDs can be formed by tailoring zigzag GNRs (ZGNRs) or armchairGNRs (AGNRs). Their bandwidths and gaps can be engineered by varying the sizeof the quantum dot and the neck width at indented edges. Effects of defects andcontact junction on electrical conductance, Seebeck coefficient and electronthermal conductance of t-GNRs are calculated. When a defect occurs in theinterior site of textured ZGNRs (t-ZGNRs), the maximum power factor within thecentral gap or near the band edges is found to be insensitive to the defectscattering. Furthermore, we found that SGQDs formed by t-ZGNRs havesignificantly better electrical power outputs than those of textured ANGRs dueto the improved functional shape of the transmission coefficient in t-ZGNRs.With a proper design of contact the maximum power factor ( figure of merit) oft-ZGNRs could reach $90\%$ ($95\%$) of the theoretical limit.

Contact effects on thermoelectric properties of textured graphene nanoribbons