Recent progress of two-dimensional heterostructures for thermoelectric applications

Abstract

The rapid development of synthesis and fabrication techniques has opened up a research upsurge in two-dimensional material heterostructures, which have received extensive attention due to their superior physical and chemical properties. Currently, thermoelectric energy conversion is an effective means to deal with the energy crisis and increasingly serious environmental pollution. Therefore, an in-depth understanding of thermoelectric transport properties in two-dimensional heterostructures is crucial for the development of micro-nano energy devices. In this review, the recent progress of two-dimensional heterostructures for thermoelectric applications is summarized in detail. Firstly, we systematically introduce diverse theoretical simulations and experimental measurements of the thermoelectric properties of two-dimensional heterostructures. Then, the thermoelectric applications and performance regulation of several common two-dimensional materials, as well as in-plane heterostructures and van der Waals heterostructures, are also discussed. Finally, the challenges of improving the thermoelectric performance of two-dimensional heterostructures materials are summarized, and related prospects are described.

Anisotropic thermoelectric properties in hydrogenated nitrogen-doped porous graphene nanosheets

“…5 The maximum Seebeck coefficients of Arm-NH-G, Zig-N-G and Zig-NH-G are closed to 0.5 mV K À1 , 0.8 mV K À1 and 0.5 mV K À1 , respectively, which are roughly equivalent to Seebeck coefficients of most molecular junctions. [54][55][56][57] By calculating the power factors (PF, S 2 s) of all junctions with chemical potentials ranging from À1 eV to 1 eV, as shown in Fig. 3(c) and (f), it is obvious that the PF value of the NH-G junction is greater than those of other junctions regardless of the transport directions.…”

First-principles prediction of the thermal conductivity of two configurations of difluorinated graphene monolayer

“…In the field of thermoelectric materials, researchers strive to identify materials with improved conversion efficiency, necessitating a reduction in κ L . 6,34–39 Simultaneously, researchers in the field of thermal management concentrate on enhancing κ L to efficiently transfer heat from heat sources to the surrounding environment. 40–44 Consequently, gaining a comprehensive understanding of the thermal transport properties of novel materials is essential, as it can provide valuable insights for tuning κ L .…”

“…The discovery of graphene by Novoselov et al in 2004 1 has sparked substantial interest in two-dimensional (2D) materials. [2][3][4][5][6] The outstanding thermal, mechanical, magnetic, and electronic properties of graphene make it a promising candidate for nanoelectronic devices. [7][8][9][10][11] However, its high electron mobility, stemming from the absence of an intrinsic bandgap, 12,13 hampers its progress and application in electronic fields, such as highperformance transistors.…”

Interfacial contact barrier and charge carrier transport of MoS2/metal(001) heterostructures

“…7,8 Transition metal dichalcogenides (TMDs) and transition metal complexes [9][10][11][12][13] have attracted great interest as one of the key materials of future electronic devices (e.g., logic devices, optoelectronic devices, and wearable electronic devices). [14][15][16][17][18][19][20][21][22][23][24] Molybdenum disulfide, in particular, is gaining significant attention due to its attractive physical and chemical properties such as optical, mechanical, and transport properties [25][26][27] and the system can be expressed by the chemical formula MX 2 , where M stands for Mo and W and X indicates S, Se, and Te atoms. The atomically thin materials are constituted by an M-X-M chain, the middle layered X site atoms are sandwiched by M site atoms on both sides, and the interlayers are bound by van der Waals (vdW) interaction.…”