scholarly journals A facile synthetic route to tungsten diselenide using a new precursor containing a long alkyl chain cation for multifunctional electronic and optoelectronic applications

RSC Advances ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 6169-6176
Author(s):  
Jahee Kim ◽  
Yi Rang Lim ◽  
Yeoheung Yoon ◽  
Wooseok Song ◽  
Bo Keun Park ◽  
...  
Keyword(s):  
Large Scale ◽  
Alkyl Chain ◽  
Low Cost ◽  
Transition Metal Dichalcogenides ◽  
Two Dimensional ◽  
Single Source ◽  
Synthetic Route ◽  
Decomposition Processes ◽  
Metal Dichalcogenides ◽  
Long Alkyl Chain

Single source precursors for coating and subsequent thermal decomposition processes enable a large-scale, low-cost synthesis of two-dimensional transition metal dichalcogenides (TMDs).

scholarly journals Two-Dimensional Nanomaterials for Boosting the Performance of Organic Solar Cells

Coatings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1530
Author(s):  
Zhenbang Wei ◽  
Langkun Chen ◽  
Kunzhu Liu ◽  
Shenghua Liu ◽  
Xiangguo Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Large Scale ◽  
2D Materials ◽  
Low Cost ◽  
Transition Metal Dichalcogenides ◽  
Two Dimensional ◽  
Photoelectric Properties ◽  
Metal Dichalcogenides ◽  
Photovoltaic Technologies

The thin-film organic solar cells (OSCs) are currently one of the most promising photovoltaic technologies to effectively harvest the solar energy due to their attractive features of mechanical flexibility, light weight, low-cost manufacturing, and solution-processed large-scale fabrication, etc. However, the relative insufficient light absorption, short exciton diffusion distance, and low carrier mobility of the OSCs determine the power conversion efficiency (PCE) of the devices are relatively lower than their inorganic photovoltaic counterparts. To conquer the challenges, the two-dimensional (2D) nanomaterials, which have excellent photoelectric properties, tunable energy band structure, and solvent compatibility etc., exhibit the great potential to enhance the performance of the OSCs. In this review, we summarize the most recent successful applications of the 2D materials, including graphene, black phosphorus, transition metal dichalcogenides, and g-C3N4, etc., adapted in the charge transporting layer, the active layer, and the electrode of the OSCs, respectively, for boosting the PCE and stability of the devices. The strengths and weaknesses of the 2D materials in the application of OSCs are also reviewed in details. Additionally, the challenges, commercialization potentials, and prospects for the further development of 2D materials-based OSCs are outlined in the end.

scholarly journals Solution-processed two-dimensional materials for ultrafast fiber lasers (invited)

Nanophotonics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 2169-2189 ◽  
Author(s):  
Bo Fu ◽  
Jingxuan Sun ◽  
Gang Wang ◽  
Ce Shang ◽  
Yuxuan Ma ◽  
...  
Keyword(s):  
Fiber Lasers ◽  
Modulation Depth ◽  
2D Materials ◽  
Low Cost ◽  
Transition Metal Dichalcogenides ◽  
Solution Processing ◽  
Two Dimensional ◽  
Solution Processed ◽  
Metal Dichalcogenides ◽  
And Performance

AbstractSince graphene was first reported as a saturable absorber to achieve ultrafast pulses in fiber lasers, many other two-dimensional (2D) materials, such as topological insulators, transition metal dichalcogenides, black phosphorus, and MXenes, have been widely investigated in fiber lasers due to their broadband operation, ultrafast recovery time, and controllable modulation depth. Recently, solution-processing methods for the fabrication of 2D materials have attracted considerable interest due to their advantages of low cost, easy fabrication, and scalability. Here, we review the various solution-processed methods for the preparation of different 2D materials. Then, the applications and performance of solution-processing-based 2D materials in fiber lasers are discussed. Finally, a perspective of the solution-processed methods and 2D material-based saturable absorbers are presented.

scholarly journals Fast and Low-Cost Synthesis of MoS2 Nanostructures on Paper Substrates for Near-Infrared Photodetectors

2021 ◽  
Vol 11 (3) ◽  
pp. 1234
Author(s):  
Neusmar J. A. Cordeiro ◽  
Cristina Gaspar ◽  
Maria J. de Oliveira ◽  
Daniela Nunes ◽  
Pedro Barquinha ◽  
...  
Keyword(s):  
Near Infrared ◽  
Low Cost ◽  
Transition Metal Dichalcogenides ◽  
Synthesis Method ◽  
Infrared Photodetectors ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
Synthesis Time ◽  
Metal Dichalcogenides ◽  
Paper Substrates

Recent advances in the production and development of two-dimensional transition metal dichalcogenides (2D TMDs) allow applications of these materials, with a structure similar to that of graphene, in a series of devices as promising technologies for optoelectronic applications. In this work, molybdenum disulfide (MoS2) nanostructures were grown directly on paper substrates through a microwave-assisted hydrothermal synthesis. The synthesized samples were subjected to morphological, structural, and optical analysis, using techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD), and Raman. The variation of synthesis parameters, as temperature and synthesis time, allowed the manipulation of these nanostructures during the growth process, with alteration of the metallic (1T) and semiconductor (2H) phases. By using this synthesis method, two-dimensional MoS2 nanostructures were directly grown on paper substrates. The MoS2 nanostructures were used as the active layer, to produce low-cost near-infrared photodetectors. The set of results indicates that the interdigital MoS2 photodetector with the best characteristics (responsivity of 290 mA/W, detectivity of 1.8 × 109 Jones and external quantum efficiency of 37%) was obtained using photoactive MoS2 nanosheets synthesized at 200 °C for 120 min.

The mechanism of hydrogen adsorption on transition metal dichalcogenides as hydrogen evolution reaction catalyst

2017 ◽  
Vol 19 (15) ◽  
pp. 10125-10132 ◽  
Author(s):  
Jinsong Wang ◽  
Jia Liu ◽  
Bao Zhang ◽  
Xiao Ji ◽  
Kui Xu ◽  
...  
Keyword(s):  
Transition Metal ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Hydrogen Adsorption ◽  
Low Cost ◽  
Transition Metal Dichalcogenides ◽  
Electrochemical Stability ◽  
Two Dimensional ◽  
Metal Dichalcogenides

Two-dimensional transition metal dichalcogenides (TMDs) have been widely considered as potential hydrogen evolution reaction (HER) catalysts because of their low cost and good electrochemical stability in acid conditions.

scholarly journals Synthesis of high quality two-dimensional materials via chemical vapor deposition

2015 ◽  
Vol 6 (12) ◽  
pp. 6705-6716 ◽  
Author(s):  
Jingxue Yu ◽  
Jie Li ◽  
Wenfeng Zhang ◽  
Haixin Chang
Keyword(s):  
Chemical Vapor Deposition ◽  
Transition Metal ◽  
Vapor Deposition ◽  
Large Scale ◽  
Transition Metal Dichalcogenides ◽  
Chemical Vapor ◽  
Two Dimensional ◽  
High Quality ◽  
Two Dimensional Materials ◽  
Metal Dichalcogenides

The synthesis of high quality two-dimensional materials such as graphene, BN, and transition metal dichalcogenides by CVD provides a new opportunity for large scale applications.

Template mediated crystal engineering

1994 ◽  
Vol 52 ◽  
pp. 480-481
Author(s):  
Brigid R. Heywood ◽  
S. Champ
Keyword(s):  
Crystal Engineering ◽  
Electrostatic Interactions ◽  
Alkyl Chain ◽  
Crystallographic Axis ◽  
Two Dimensional ◽  
Engineering Process ◽  
Solution Interface ◽  
Extensive Program ◽  
Geometric Homology ◽  
Long Alkyl Chain

Recent work on the crystallisation of inorganic crystals under compressed monomolecular surfactant films has shown that two dimensional templates can be used to promote the oriented nucleation of solids. When a suitable long alkyl chain surfactant is cast on the crystallisation media a monodispersied population of crystals forms exclusively at the monolayer/solution interface. Each crystal is aligned with a specific crystallographic axis perpendicular to the plane of the monolayer suggesting that nucleation is facilitated by recognition events between the nascent inorganic solid and the organic template.For example, monolayers of the long alkyl chain surfactant, stearic acid will promote the oriented nucleation of the calcium carbonate polymorph, calcite, on the (100) face, whereas compressed monolayers of n-eicosyl sulphate will induce calcite nucleation on the (001) face, (Figure 1 & 2). An extensive program of research has confirmed the general principle that molecular recognition events at the interface (including electrostatic interactions, geometric homology, stereochemical complementarity) can be used to promote the crystal engineering process.

scholarly journals Super-resolved Optical Mapping of Reactive Sulfur-Vacancies in Two-Dimensional Transition Metal Dichalcogenides

ACS Nano ◽  
2021 ◽  
Author(s):  
Miao Zhang ◽  
Martina Lihter ◽  
Tzu-Heng Chen ◽  
Michal Macha ◽  
Archith Rayabharam ◽  
...  
Keyword(s):  
Transition Metal ◽  
Optical Mapping ◽  
Transition Metal Dichalcogenides ◽  
Two Dimensional ◽  
Metal Dichalcogenides
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