Thermoelectric Power in Graphene

Sankeshwar, N. S.; Kubakaddi, S. S.; Mulimani, B. G.

doi:10.5772/56720

Cited by 16 publications

(11 citation statements)

References 120 publications

(292 reference statements)

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“…21 In the literature, extensive studies have been focused on evaluating and measuring the thermopower and the thermoelectric figure of merit for pure graphene monoand bilayers, often at the Si/SiO 2 substrate; a comprehensive review collects these data. 22 However detailed knowledge of these parameters for various stackings and number of multilayers is missing, and the effect of the SiC substrate also has not been investigated yet, except in the case of a single graphene layer. 23 Therefore, we report here theoretical calculations of the Seebeck coefficient and of the electrical contribution to the ZT figure of merit for different mono-and multilayers.…”

mentioning

confidence: 99%

Effect of C-face 4H-SiC(0001) deposition on thermopower of single and multilayer graphene in AA, AB and ABC stacking

Wierzbowska¹,

Dominiak²,

Pizzi³

2014

2D Mater.

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The Seebeck coefficient in multilayer graphene is investigated within the density-functional theory, using the semiclassical Boltzmann equations and interpolating the bands in a maximally-localized Wannier functions basis set. We compare various graphene stackings (AA, AB and ABC) both freestanding and deposited on a 4H-SiC(0001) C-terminated substrate. We find that the presence of the SiC substrate can significantly affect the thermopower properties of graphene layers, depending on the stacking, providing a promising way to tailor efficient graphene-based devices.

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mentioning

confidence: 99%

Effect of C-face 4H-SiC(0001) deposition on thermopower of single and multilayer graphene in AA, AB and ABC stacking

Wierzbowska¹,

Dominiak²,

Pizzi³

2014

2D Mater.

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“…Although graphene has high Seebeck coefficient and electrical conductivity, [49,50] hence high power factor, its ZT is small due to its high thermal conductivity. [51,52] While small ZT materials are not good candidates for thermoelectric applications, significant effort has been devoted to enhancing the ZT of graphene and related nanostructures, [53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69] usually by reducing the thermal conductivity with various methods.…”

Section: Discussionmentioning

confidence: 99%

Coulomb drag and counterflow Seebeck coefficient in bilayer-graphene double layers

Tian

et al. 2017

Nano Energy

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We have fabricated bilayer-graphene double layers separated by a thin (∼20 nm) boron nitride layer and performed Coulomb drag and counterflow thermoelectric transport measurements. The measured Coulomb drag resistivity is nearly three orders smaller in magnitude than the intralayer resistivities. The counterflow Seebeck coefficient is found to be well approximated by the difference between Seebeck coefficients of individual layers and exhibit a peak in the regime where two layers have opposite sign of charge carriers. The measured maximum counterflow power factor is ∼ 700 µW/K 2 cm at room temperature, promising high power output per mass for lightweight thermoelectric applications. Our devices open a possibility for exploring the novel regime of thermoelectrics with tunable interactions between n-type and p-type channels based on graphene and other two-dimensional materials and their heterostructures.

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“…[1][2][3] It is a unique material due to the sp 2 hybridisation of carbon atoms, lending a promising characteristic in condensed matter and high-energy physics. 4 However, there is still no simple way to obtain graphene in a single-step process from pristine graphite.…”

Section: Abstract: a Simplified Hummer's Methods Was Successfully Usedmentioning

confidence: 99%

Tailoring the Chemical and Structural Properties of Graphene Oxide Nanoplatelets Synthesised at Room Temperature with Different Processing Times

Yee¹,

Ong²,

Ngee³

et al. 2017

JPS

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ABSTRACT:A simplified Hummer's method was successfully used in synthesising graphene oxide nanoplatelets. These nanoplatelets were synthesised at room temperature at various processing times (24 h, 72 h, and 120 h). Ultraviolet visible spectroscopy (UVvis) showed that all synthesised graphene oxide nanoplatelets suspensions have similar broad shoulder absorbance at a wavelength of 300 nm. Furthermore, similar functional groups were detected by Fourier transform infrared spectroscopy (FTIR) across all types of graphene oxide nanoplatelets structures. The effect of processing time on the thickness of the sheet size was interpreted through topology using atomic force microscopy (AFM). The structural properties of graphene oxide nanoplatelets were evaluated using X-ray diffraction (XRD). The results showed a slight increase in the interlayer spacing with no sharp distinction in the crystallinity for graphene oxide nanoplatelets at longer processing times. The ratio of carbon to oxygen composition on the surface of each synthesised graphene oxide nanoplatelet was computed using the X-ray photoelectron spectroscopy

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Thermoelectric Power in Graphene

Cited by 16 publications

References 120 publications

Effect of C-face 4H-SiC(0001) deposition on thermopower of single and multilayer graphene in AA, AB and ABC stacking

Effect of C-face 4H-SiC(0001) deposition on thermopower of single and multilayer graphene in AA, AB and ABC stacking

Coulomb drag and counterflow Seebeck coefficient in bilayer-graphene double layers

Tailoring the Chemical and Structural Properties of Graphene Oxide Nanoplatelets Synthesised at Room Temperature with Different Processing Times

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