Two-dimensional materials: new opportunities for electronics, photonics and optoelectronics

Xiong, Qihua

doi:10.1016/j.scib.2019.07.010

Cited by 9 publications

(5 citation statements)

References 14 publications

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“…6,7 To synthesize various types of 2D materials in high quality and controllable fashion, it requires tremendous efforts in chemical vapor deposition (CVD) growth, including optimizing experimental setups, raw materials, growth substrates, and so on. 8 Chemical, 9 ionimplant, 10 and electrostatic doping 11 are excellent in tuning charge carrier density, but they lack in continuous band gap tailoring and often change the original structure of 2D materials. Therefore, a method to tune band gap of 2D materials rather than synthesis and doping is desirable.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Band gap tuning is a main goal in exploring two-dimensional (2D) materials because they exhibit distinct electronic band gap structures for diverse applications, such as photodetectors, , light-emitting diodes, catalysis, and energy storage and conversion devices. , To synthesize various types of 2D materials in high quality and controllable fashion, it requires tremendous efforts in chemical vapor deposition (CVD) growth, including optimizing experimental setups, raw materials, growth substrates, and so on . Chemical, ion-implant, and electrostatic doping are excellent in tuning charge carrier density, but they lack in continuous band gap tailoring and often change the original structure of 2D materials. Therefore, a method to tune band gap of 2D materials rather than synthesis and doping is desirable.…”

Section: Introductionmentioning

confidence: 99%

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Paraffin-Enabled Compressive Folding of Two-Dimensional Materials with Controllable Broadening of the Electronic Band Gap

Zhang

Zhao

Yang

et al. 2021

ACS Appl. Mater. Interfaces

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The capability to manipulate the size of the electronic band gap is of importance to semiconductor technology. Among these, a wide direct band gap is particularly helpful in optoelectronic devices due to the efficient utilization of blue and ultraviolet light. Here, we reported a paraffin-enabled compressive folding (PCF) strategy to widen the band gap of two-dimensional (2D) materials. Due to the large thermal expansion coefficient of paraffin, folded 2D materials can be achieved via thermal engineering of the paraffin-assisted transfer process. It can controllably introduce 0.2–1.3% compressive strain onto folded structures depending on the temperature differences and transfer the folding product to both rigid and soft substrates. Exemplified by MoS2, its folded multilayers demonstrated blue-shifts at direct gap transition peaks, six times stronger photoluminescence intensity, almost double mobility, and 20 times higher photoresponsivity over unfolded MoS2. This PCF strategy can attain controllable widening band gap of 2D materials, which will open up novel applications in optoelectronics.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Paraffin-Enabled Compressive Folding of Two-Dimensional Materials with Controllable Broadening of the Electronic Band Gap

Zhang

Zhao

Yang

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

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“…Since the discovery of graphene in 2004 [1], many two‐dimensional materials have been rapidly developed for practical applications, such as black phosphorene [2], silicene [3], germanene [4], boronene [5], and arsenene [6, 7]. These two‐dimensional (2D) materials have excellent properties for practical applications in the fields of optics, magnetism, electronics [8–10], and energy storage. Lithium‐ion batteries (LIBs), as important electrical energy storage devices, possess advantages such as high energy density, power density, high operating voltage, and reasonable stability [11, 12].…”

Section: Introductionmentioning

confidence: 99%

Effects of strain and Li adsorption on the electronic structure and optical properties of arsenene

Liu

et al. 2023

Int J of Quantum Chemistry

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The effects of shear deformation on the electronic structure and optical properties of intrinsic arsenene and arsenene adsorbed Li are investigated using a first‐principles approach. Shear deformation can transform the band gap of intrinsic arsenene from indirect‐direct‐indirect. After the adsorption of Li atoms by arsenene, it transforms from semiconductor to metal with a very obvious hybridization between the 2s orbital of Li and the 4p orbital of As. With the increase of shear deformation, the charge transfer increases and has a good modulation of the absorption coefficient and reflectivity. The adsorption of multiple Li atoms makes the dielectric constant of arsenene more sensitive to low energy spectra and increases the imaginary part of the photoconductivity, which increases the refractive index and decreases the extinction coefficient to some extent.

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“…have been developed rapidly. These two-dimensional materials have excellent properties for applications in electronics, magnetism, catalysis, and energy storage [9][10][11][12][13][14][15][16][17]. Since graphene, silicene, and germanene have zero bandgaps near the Fermi energy level, this greatly limits their application in electronic devices [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

First-principles study of strain on BN-doped arsenene

Liu

et al. 2022

J Mol Model

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The effects of B, N, and BN doped arsenenes and different strains on the optoelectronic properties of BN doped arsenene were investigated using a rst-principles approach. The B, N, and BN doping caused the bandgap of arsenene to shift from indirect-direct and a strong charge-transfer occurred between arsenene and B, N and BN, and the transfer between N atoms and arsenene was more drastic. The structural stability and bandgap decrease gradually with the increase of tensile and compressive deformation, but the compressive deformation is easier to achieve stable modulation of the bandgap compared with tensile deformation. As atoms and B atoms make the main contribution to the BN-doped arsenene system, and N atoms contribute to some energy regions, the overall contribution is small. The absorption and re ection peaks are red-shifted with the increase of tensile and compressive deformation.

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Two-dimensional materials: new opportunities for electronics, photonics and optoelectronics

Cited by 9 publications

References 14 publications

Paraffin-Enabled Compressive Folding of Two-Dimensional Materials with Controllable Broadening of the Electronic Band Gap

Paraffin-Enabled Compressive Folding of Two-Dimensional Materials with Controllable Broadening of the Electronic Band Gap

Effects of strain and Li adsorption on the electronic structure and optical properties of arsenene

First-principles study of strain on BN-doped arsenene

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