Flexible organic-intercalated WSe2 hybrid: electronic structure modification and thermoelectric performance optimization

Liang, Jia; Li, Yang; Yin, Shujia; Wan, Chunlei

doi:10.1016/j.mtener.2023.101355

Cited by 4 publications

(2 citation statements)

References 38 publications

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“…Organic-inorganic materials have low thermal conductivity and low toxicity, and they are lightweight, but their ZT value is minimal, which makes them unsuitable for practical application. Liang et al [69] synthesized an organic-inorganic superlattice of hybrid tetrabutylammonium-WSe 2 (TBA-WSe 2 ) through the electrochemical process. This material has an enhanced power factor with a maximum figure of merit value of 0.25.…”

Section: Organic-inorganic Compositesmentioning

confidence: 99%

A Review of Thermoelectric Generators in Automobile Waste Heat Recovery Systems for Improving Energy Utilization

Bhakta,

Kundu

2024

Energies

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With the progress of modern times, automobile technology has become integral to human society. At the same time, the need for energy has also grown. In parallel, the total amount of waste energy that is liberated from different parts of the automobile has also increased. In this ever-increasing energy demand pool, future energy shortages and environmental pollution are the primary concerns. A thermoelectric generator (TEG) is a promising technology that utilizes waste heat and converts it into useful electrical power, which can reduce fuel consumption to a significant extent. This paper comprehensively reviews automobile thermoelectric generators and their technological advancements. The review begins by classifying different waste heat technologies and discussing the superiority of TEGs over the other existing technologies. Then, we demonstrate the basic concept of and advancements in new high-performance TEG materials. Following that, improvements and associated challenges with various aspects, such as the heat exchanger design, including metal foam, extended body, intermediate fluid and heat pipe, leg geometry design, segmentation, and multi-staging, are discussed extensively. Finally, the present study highlights research guidelines for TEG design, research gaps, and future directions for innovative works in automobile TEG technologies.

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Section: Organic-inorganic Compositesmentioning

confidence: 99%

A Review of Thermoelectric Generators in Automobile Waste Heat Recovery Systems for Improving Energy Utilization

Bhakta,

Kundu

2024

Energies

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“…Molecular nanolayers (MNLs) have been extensively investigated on inorganic surfaces for applications in tribology, 1 lithography, 2 electromechanical systems, 3,4 sensors, 5 and transistors, 6,7 or as intercalations in layered structures. [8][9][10][11] In contrast, interfacial MNLs with assemblies of molecules covalently bridging adjacent inorganic nanolayers are much less explored. 12 MNLs can curtail interfacial diffusion and phase formation, [13][14][15][16] and stimulate multifold increases in interfacial fracture energy, 17 and enhance thermal 18 and electrical transport.…”

mentioning

confidence: 99%

Strain hardening and toughening in metal/molecular nanolayer/metal nanosandwiches

Sangiovanni,

Rowe,

Sharma

et al. 2024

Applied Physics Letters

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Introducing molecular nanolayers (MNLs) is attractive for enhancing the stability of, and inducing unusual properties at, inorganic thin film interfaces. Although organic molecules anchored to inorganic surfaces have been studied extensively, property enhancement mechanisms underpinned by molecular assemblies at inorganic thin film interfaces are yet to be revealed and understood. Here, ab initio molecular dynamics simulations of tensile strain of Au/MNL/Au thin film nanosandwich models provide insights into molecularly induced strain hardening and toughening. Au/MNL/Au nanosandwiches support up to ≈30% higher stresses and exhibit up to ≈140% higher toughness than pure Au slab models. Both hardening and toughening are governed by molecular length and terminal chemistry in the MNL. Strong Au/MNL interface bonding and greater molecular length promote defect creation in Au, which results in strain hardening. Accommodation of increasing post-hardening strains in the MNL mitigates the stress increase in the Au slabs, delays interface fracture, and contributes to toughening. Remarkably, toughening correlates with equilibrium interface strain, which could be used as a proxy for efficiently identifying promising inorganic/MNL combinations that provide toughening. Our findings are important for the discovery and design of inorganic–organic interfaces, nanomaterials, and composites.

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Controllable carrier transfer modulation of ambipolar van der Waals semiconductors toward forksheet FETs

Li,

Qi,

Zhu

et al. 2024

Applied Physics Letters

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The imperative for continuous device miniaturization has heightened the need for logic reconfigurability due to its benefits in circuit design simplification and process optimization. Van der Waals ambipolar transistors, notable for their inherent reconfigurable characteristics, have garnered significant interest for their potential to revolutionize information electronics. Nevertheless, as the semiconductor thickness approaches the 3-nm mark, precise modulation of electrical polarity presents a considerable challenge as minor variations in thickness can lead to significant electrical disparities. Here, we introduce a silicon backend process-compatible approach by employing surface charge transfer doping to skillfully adjust the polarity in ambipolar transistors. This universal method can achieve a controllable p-type doping effect and good electrical symmetry in ambipolar semiconductors. Through careful calibration of the MoO3 dopant layer thickness, we significantly enhance the hole mobility in doped WSe2 field-effect transistors (FETs), increasing it from 8 to 100 cm2 V−1 s−1, surpassing the performance of most non-silicon p-type semiconductors. A thorough temperature-dependent doping characterization elucidates the deeper traps-induced Schottky barrier variation for hole transport, and a reduction in current fluctuation for electron transport in WSe2/MoO3 FETs. Leveraging the precision in electrical polarity control, we demonstrate a complementary logic inverter by integrating two doped ambipolar FETs on a single monolithic channel. This advancement paves the way for quasi-forksheet structures and underscores the benefits in evolving advanced processing technologies, steering toward scalable, cost-effective, and efficient electronic device fabrication.

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Flexible organic-intercalated WSe2 hybrid: electronic structure modification and thermoelectric performance optimization

Cited by 4 publications

References 38 publications

A Review of Thermoelectric Generators in Automobile Waste Heat Recovery Systems for Improving Energy Utilization

A Review of Thermoelectric Generators in Automobile Waste Heat Recovery Systems for Improving Energy Utilization

Strain hardening and toughening in metal/molecular nanolayer/metal nanosandwiches

Controllable carrier transfer modulation of ambipolar van der Waals semiconductors toward forksheet FETs

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