Van der Waals heterostructures with one-dimensional atomic crystals

Qin, Jiaqian; Wang, Cong; Zhen, Liang; Li, Lain‐Jong; Xu, Cheng‐Yan; Chai, Yang

doi:10.1016/j.pmatsci.2021.100856

Cited by 38 publications

(30 citation statements)

References 302 publications

(312 reference statements)

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physical properties, including higher carrier mobility than transition metal dichalcogenides (TMDs) and much better air stability than black phosphorus (BP), which shows the great potential of 2D Te for future electronics. [12][13][14][15][16][17] The few-layer Te is predicted to have a thickness-dependent bandgap, varying from nearly 0.31 eV for bulk to 1.17 eV for bilayer. [13] The carrier mobility is theoretically predicted to be extraordinarily high, up to 10 4 -10 6 cm 2 V −1 s −1 .

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confidence: 99%

Two‐Dimensional Tellurene Transistors with Low Contact Resistance and Self‐Aligned Catalytic Thinning Process

Lin

Wang

Chen

et al. 2022

Adv Elect Materials

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Two‐dimensional (2D) tellurene (Te) has shown its great potential in nanoelectronics for its high carrier mobility and air stability. However, the high‐resistance electrical contact and relatively thick Te channel hinder its ultimate scaling and device performance. Here, the transport property of Te field‐effect transistors using platinum (Pt) contact with high work function is studied, which facilitates the effective hole injection in the p‐type Te channel. The electrical contact to Te using the Y‐function method (YFM) and the transmission line method (TLM) is investigated. The Te transistors with Pt contact show a low contact resistance of 400 Ωµm, a short transfer length of 80 nm, and low specific contact resistivity of 3.2 × 10−7 Ωcm2, resulting from the low Schottky barrier height (SBH) of Pt/Te interface. The Pt electrode also can work as an efficient catalyst that allows reduction of the Te channel thickness with a controllable thinning process in water under white light illumination. This self‐aligned catalytic thinning process enables the construction of the transistors with a thin Te channel and thick Te contact with Pt metal electrodes, which provides a device configuration with both effective electrostatic control and low contact resistance.

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confidence: 99%

Two‐Dimensional Tellurene Transistors with Low Contact Resistance and Self‐Aligned Catalytic Thinning Process

Lin

Wang

Chen

et al. 2022

Adv Elect Materials

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“…Artificially designing a low symmetry structure is essential for enriching the variety of anisotropic material families. Generally, the core-shell heterostructures, also called 1D radial heterostructures, [201] have been studied commonly for a long time. [202,203] The core-shell heterostructures possess much higher anisotropy in structure than the two single compounds.…”

Section: D Heterostructurementioning

confidence: 99%

Anisotropic Low‐Dimensional Materials for Polarization‐Sensitive Photodetectors: From Materials to Devices

Wang

Jiang

et al. 2022

Advanced Optical Materials

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of polarization states: i) Natural light, the vibrational plane of which is not fixed. The electric vectors of natural light are axisymmetric, evenly distributed in all directions and synchronously vibrating. ii) Complete polarized light can be subdivided into linearly polarized light, elliptically polarized light, and circularly polarized light. Linearly polarized light has a fixed vibrational plane. The vibrational track of its electric vector is a straight line during propagation. Elliptically polarized light, similarly, the terminal trajectory that the electric vector vibrates is an ellipse. The plane of the ellipse is perpendicular to the propagative direction of light. And the electric vector rotates constantly, the magnitude and direction of which change regularly with time. When facing the direction light propagates, if the end of the electric vector travels counterclockwise, it is a right-handed circular polarization state; if clockwise, it is a left-handed circular polarization state. Circularly polarized light is a special case of elliptically polarized light. iii) Partially polarized light, the vibration of the electric vector has a comparative advantage in a certain direction. Simply, it is the superposition of natural light and complete polarized light. Because of that common characteristic of light, the polarization state of light provides a new degree of freedom in detection and application. [18,19] Early studies of the polarization-sensitive photodetectors mainly focus on the macroscopic anisotropy, which requires complex technologies for the patterning and aligning process. [20][21][22] Anisotropic low-dimensional materials have low-symmetry crystal structures including orthorhombic, monoclinic, and triclinic so that they have intrinsic anisotropic properties [23][24][25] obtaining highly polarization sensitivity for photodetectors. [26,27] Fortunately, low-dimensional materials are emerging due to their large families, [28][29][30][31][32] fascinating photo electric characteristics, [28,[32][33][34] and naturally microscopic anisotropy among most of them. [23] From early on, the pioneering work has been done on BP-based polarization-sensitive photodetectors, which advance the development of anisotropic systems in this application. [35] According to the diversified evolution of element types, apart from black phosphorus, [36][37][38][39][40] some monoelemental 2D materials with anisotropy like black arsenic, [41,42] antimonene, [43,44] borophene, [45,46] and tellurene [47,48] have been discovered and studied. Meanwhile, a mass of anisotropic binaries have sprung up typically including

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“…It is predictable that 1D vdW heterostructures would represent the new frontier of materials research in the near future. 6,52,66 Currently, the highly efficient production of long-continuous crystal 1D vdW heterostructures with good uniformity and low cost is essential for property study but remains challenging. Based on the template-assisted growth method, the synthesis of high-quality 1D vdW heterostructures can be realized by following the basic strategy: (1) Choose a starting nanotube with a proper diameter, good isolation, and clean surface.…”

Section: ■ Conclusion and Prospectsmentioning

confidence: 99%

“…1D vdW heterostructures offer a novel platform to research and modulate, in the confined 1D space, the formation, relaxation, and transfer of electrons, phonons, and excitons. It is predictable that 1D vdW heterostructures would represent the new frontier of materials research in the near future. ,, …”

Section: Conclusion and Prospectsmentioning

confidence: 99%

One-Dimensional van der Waals Heterostructures: A Perspective

et al. 2021

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As a new frontier in low-dimensional material research, van der Waals (vdW) heterostructures, represented by 2D heterostructures, have attracted tremendous attention due to their unique properties and potential applications. The emerging 1D heterostructures open new possibilities for the field with expectant unconventional properties and yet more challenging preparation pathways. This Perspective aims to give an overall understanding of the state-of-the-art growth strategies and fantastic properties of the 1D heterostructures and provide an outlook for further development based on the controlled preparation, which will bring up a variety of applications in high-performance electronic, optoelectronic, magnetic, and energy storage devices. A quick rise of the fundamentals and application study of 1D heterostructures is anticipated.

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Van der Waals heterostructures with one-dimensional atomic crystals

Cited by 38 publications

References 302 publications

Two‐Dimensional Tellurene Transistors with Low Contact Resistance and Self‐Aligned Catalytic Thinning Process

Two‐Dimensional Tellurene Transistors with Low Contact Resistance and Self‐Aligned Catalytic Thinning Process

Anisotropic Low‐Dimensional Materials for Polarization‐Sensitive Photodetectors: From Materials to Devices

One-Dimensional van der Waals Heterostructures: A Perspective

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