High Thermoelectric Power Factor in Graphene/hBN Devices
arXiv:1607.00583 · doi:10.1073/pnas.1615913113
Abstract
Fast and controllable cooling at nanoscales requires a combination of highly efficient passive cooling and active cooling. While passive cooling in graphene-based devices is quite effective due to graphene's extraordinary heat-conduction, active cooling has not been considered feasible due to graphene's low thermoelectric power factor. Here we show that the thermoelectric performance of graphene can be significantly improved by using hBN substrates instead of SiO2. We find the room temperature efficiency of active cooling, as gauged by the power factor times temperature, reaches values as high as 10.35 W/mK, corresponding to more than doubling the highest reported room temperature bulk power factors, 5 W/mK in YbAl3, and quadrupling the best 2D power factor, 2.5 W/mK, in MoS2. We further show that in these devices the electron-hole puddles region is significantly reduced. This enables fast gate-controlled switching of the Seebeck coefficient polarity for application in n- and p-type integrated active cooling devices.
arXiv comment14 pages, 3 figures, 10 pages supporting information
References in corpus (32)
- Two-Dimensional Gas of Massless Dirac Fermions in Graphene
- Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
- Boron nitride substrates for high-quality graphene electronics
- Thermal Properties of Graphene, Carbon Nanotubes and Nanostructured Carbon Materials
- Intrinsic and Extrinsic Performance Limits of Graphene Devices on SiO2
- Observation of Electron-Hole Puddles in Graphene Using a Scanning Single Electron Transistor
- Charged Impurity Scattering in Graphene
- Atomic Structure of Graphene on SiO2
- STM Spectroscopy of ultra-flat graphene on hexagonal boron nitride
- Carrier transport in 2D graphene layers
- A self-consistent theory for graphene transport
- Temperature dependent transport in suspended graphene
- Hunting for Monolayer Boron Nitride: Optical and Raman Signatures
- Measurement of Scattering Rate and Minimum Conductivity in Graphene
- Length-dependent thermal conductivity in suspended single-layer graphene
- Thermoelectric and Magnetothermoelectric Transport Measurements of Graphene
- Single Layer Behavior and Its Breakdown in Twisted Graphene Layers
- Anomalous thermoelectric transport of Dirac particles in graphene
- The thermopower and Nernst Effect in graphene in a magnetic field
- Electronic properties of graphene: a perspective from scanning tunneling microscopy and magneto-transport
- Screening induced temperature dependent transport in 2D graphene
- Enhanced Thermoelectric Power in Graphene: Violation of the Mott Relation By Inelastic Scattering
- Theory of thermopower in 2D graphene
- Realization of a Tunable Artificial Atom at a Supercritically Charged Vacancy in Graphene
- The quantum scattering time and its implications on scattering sources in graphene
- The quantum scattering time and its implications on scattering sources in graphene (Supplementary)
- Gate-Tunable and Thickness-dependent Electronic and Thermoelectric Transport in few-layer MoS2
- Enhanced Thermoelectric Power in Dual-Gated Bilayer Graphene
- Thermoelectric Transport of Massive Dirac Fermions in Bilayer Graphene
- Effect of charged impurities on graphene thermoelectric power near the Dirac point
- Electronic Thermal Conductivity Measurements in Intrinsic Graphene
- Local and Global Screening Properties of Graphene Revealed through Landau Level Spectroscopy
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- Ultrafast intrinsic optical-to-electrical conversion dynamics in graphene photodetector
- Experimental identification of critical condition for drastically enhancing thermoelectric power factor of two-dimensional layered materials
- Photo Thermal Effect Graphene Detector Featuring 105 Gbit s-1 NRZ and 120 Gbit s-1 PAM4 Direct Detection
- Excitons in hexagonal boron nitride single-layer: a new platform for polaritonics in the ultraviolet
- Ultrafast, Zero-Bias, Graphene Photodetectors with Polymeric Gate Dielectric on Passive Photonic Waveguides
- Seebeck Coefficient of a Single van der Waals Junction in Twisted Bilayer Graphene
- Nanowires: A route to efficient thermoelectric devices
- Nano-photocurrent mapping of local electronic structure in twisted bilayer graphene
- Single-Material Graphene Thermocouples
- Terahertz detection with graphene FETs: photothermoelectric and resistive self-mixing contributions to the detector response
- Effects of bonded and non-bonded B/N codoping of graphene on its stability,\break interaction energy, electronic structure, and power factor
- Interaction driven giant thermopower in magic-angle twisted bilayer graphene
- Optimal band gap for improved thermoelectric performance of two-dimensional Dirac materials
- Plasmon-enhanced graphene photodetector with CMOS-compatible titanium nitride
- Length dependent lattice thermal conductivity of single \& multi layered hexagonal boron nitride: A first-principles study using the Callaway-Klemens \& real space super cell methods
- Coulomb drag and counterflow Seebeck coefficient in bilayer-graphene double layers
- Tailored nano-electronics and photonics with two-dimensional materials at terahertz frequencies
- Lateral transition metal dichalcogenide heterostructures for high efficiency thermoelectric devices
- Engineering THz-frequency light generation, detection and manipulation through graphene
- Tunable Ultrafast Thermal Relaxation in Graphene Measured by Continuous-Wave Photomixing
- Leveraging Electron-Phonon Interaction to Enhance Thermoelectric Power Factor in Graphene-Like Semimetals
- Imaging the Ettingshausen effect and cryogenic thermoelectric cooling in a van der Waals semimetal
- Thermopower probing emergent local moments in magic-angle twisted bilayer graphene
- Thermoelectric transport properties in graphene connected molecular junctions
- Electronic structural critique of interesting thermal and optical properties of CGe germagraphene
- Thermopower in hBN/graphene/hBN superlattices
- Effect of Electron-Phonon Interaction and Ionized Impurity Scattering on the Room Temperature Thermoelectric Properties of Bulk
- Kondo Impurities in Two Dimensional MoS2 for Achieving Ultrahigh Thermoelectric Powerfactor
- The electrothermal conductance and heat capacity of black phosphorus
- Enhanced Terahertz Photoresponse via Acoustic Plasmon Cavity Resonances in Scalable Graphene
- Progress of microscopic thermoelectric effects studied by micro-and nano-thermometric techniques