Capping nanoparticles with graphene quantum dots for enhanced thermoelectric performance

Liang, Yuantong; Lu, Chenguang; Ding, D.; Zhao, Man; Wang, Dawei; Hu, Chao; Qiu, Jieshan; Xie, Gang; Tang, Zhiyong

doi:10.1039/c5sc00910c

Cited by 44 publications

(26 citation statements)

References 57 publications

(64 reference statements)

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“…The corresponding X‐ray powder diffraction (XRD) patterns are listed in Figure e and can be indexed to face‐centered cubic PbTe (JCPD No. 38–1435) . The average crystal domain size of the thin films annealed at 300, 350, 400, and 450 °C is 25.3, 29.8, 37.7, and 41.3 nm, respectively, calculated from the Scherrer equation, which reveals that the domain size of the thin films increases with annealing temperature.…”

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confidence: 88%

Interface Engineering in Solution‐Processed Nanocrystal Thin Films for Improved Thermoelectric Performance

et al. 2016

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Solution-processed PbTe nanocrystal (NC) thin films are ligand exchanged by ethylenediamine and then annealed at 400 °C for enhancement of NC coupling. To further improve the performance, heterostructures are introduced into the PbTe/PbS films. Significantly, an optimized ZT of ≈0.30 is successfully achieved at 405 K. This method opens an avenue toward thermoelectric thin film devices with high performance.

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confidence: 88%

Interface Engineering in Solution‐Processed Nanocrystal Thin Films for Improved Thermoelectric Performance

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“…Significant results have been already achieved. However, in addition solar cell devices, thermoelectric devices are attracting much attention [141].…”

Section: Conclusion Open Points and Perspectivesmentioning

confidence: 99%

A Review on Metal Nanoparticles Nucleation and Growth on/in Graphene

Ruffino

Giannazzo

2017

Crystals

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In this review, the fundamental aspects (with particular focus to the microscopic thermodynamics and kinetics mechanisms) concerning the fabrication of graphene-metal nanoparticles composites are discussed. In particular, the attention is devoted to those fabrication methods involving vapor-phase depositions of metals on/in graphene-based materials. Graphene-metal nanoparticles composites are, nowadays, widely investigated both from a basic scientific and from several technological point of views. In fact, these graphene-based systems present wide-range tunable and functional electrical, optical, and mechanical properties which can be exploited for the design and production of innovative and high-efficiency devices. This research field is, so, a wide and multidisciplinary section in the nanotechnology field of study. So, this review aims to discuss, in a synthetic and systematic framework, the basic microscopic mechanisms and processes involved in metal nanoparticles formation on graphene sheets by physical vapor deposition methods and on their evolution by post-deposition processes. This is made by putting at the basis of the discussions some specific examples to draw insights on the common general physical and chemical properties and parameters involved in the synergistic interaction processes between graphene and metals.

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“…Since massless Dirac fermions provide graphene with unique electronic properties , graphene quantum dots are nowadays used in solar cells , bioimaging , phototransistors , supercapacitors , light emitting diodes , and thermoelectric devices . Recent technological progress indeed makes it possible to synthesise them with tunable size .…”

Section: Introductionmentioning

confidence: 99%

Hexagonal graphene quantum dots

Ghosh

Schwingenschlögl

2016

Physica Rapid Research Ltrs

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We study hexagonal graphene quantum dots, using density functional theory, to obtain a quantitative description of the electronic properties and their size dependence, considering disk and ring geometries with both armchair and zigzag edges. We show that the electronic properties of quantum dots with armchair edges are more sensitive to structural details than those with zigzag edges. As functions of the inner and outer radii, we find in the case of armchair edges that the size of the band gap follows distinct branches, while in the case of zigzag edges it changes monotonically. This behaviour is further analyzed by studying the ground state wave function and explained in terms of its localisation. (© 2016 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim)

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Capping nanoparticles with graphene quantum dots for enhanced thermoelectric performance

Abstract: The general capability of graphene quantum dots to serve as capping ligands exchanging native organic stabilizers for various types of semiconductor nanoparticles affords the opportunity to engineer functional nanocomposites with remarkable thermoelectric properties.

Cited by 44 publications

References 57 publications

Interface Engineering in Solution‐Processed Nanocrystal Thin Films for Improved Thermoelectric Performance

Interface Engineering in Solution‐Processed Nanocrystal Thin Films for Improved Thermoelectric Performance

A Review on Metal Nanoparticles Nucleation and Growth on/in Graphene

Hexagonal graphene quantum dots

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