Engineering the photoresponse of liquid-exfoliated 2D materials by size selection and controlled mixing for an ultrasensitive and ultraresponsive photodetector

Alzakia, Fuad Indra; Tang, Baoshan; Pennycook, Stephen J.; Tan, Swee Ching

doi:10.1039/d0mh01493a

Cited by 35 publications

(27 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among them, transition metal dichalcogenides (TMDs) establish themselves as representative photoactive materials with strong light–matter interaction and wide spectral absorption. [ 33,34 ] More intriguingly, band alignments of the TMD‐based van der Waals heterostructures cover both type I, type II, and even type III semiconductor heterojunctions, [ 33 ] which would enable efficient charge transfer in the layered constituents, and give rise to new driving mechanisms for ion transport in between the atomic layers.…”

Section: Figurementioning

confidence: 99%

Harnessing Ionic Power from Equilibrium Electrolyte Solution via Photoinduced Active Ion Transport through van‐der‐Waals‐Like Heterostructures

et al. 2021

View full text Add to dashboard Cite

Nanofluidic ion transport through van der Waals heterostructures, composed of two or more types of reconstructed 2D nanomaterials, gives rise to fascinating opportunities for light‐energy harvesting, due to coupling between the optoelectronic properties of the layered constituents and ion transport in between the atomic layers. Here, a photoinduced active ion transport phenomenon through transition metal dichalcogenides (TMDs)‐based van‐der‐Waals‐like multilayer heterostructures is reported for harnessing ionic power from equilibrium electrolyte solution. The binary heterostructure comprises sequentially stacked 2D‐WS2 and 2D‐MoS2 multilayers with sub‐1 nm interlayer spacing. Upon visible‐light illumination, a net ionic flow is initiated through the Janus membrane, suggesting a directional cationic transport from WS2 to MoS2 part. The transport mechanism is explained in terms of a photovoltaic effect due to type II band alignment of WS2/MoS2 heterostructures. The driving mechanism can be generally applied to a variety of heterogeneous TMD membranes with type II semiconductor heterojunctions. In equilibrium ionic solutions, the maximum ionic photoresponse approaches ≈21 µA cm–2 and ≈45 mV under one sun equivalent excitation. Under optimized conditions, the harvested power density reaches 2 mW m–2. The proof‐of‐concept demonstration of photonic‐to‐ionic power generation within angstrom‐scale confinement anticipates potential for light‐controlled ionic circuits, artificial photosynthesis, and biomimetic energy conversion.

show abstract

Section: Figurementioning

confidence: 99%

Harnessing Ionic Power from Equilibrium Electrolyte Solution via Photoinduced Active Ion Transport through van‐der‐Waals‐Like Heterostructures

et al. 2021

View full text Add to dashboard Cite

show abstract

“…[ 19 ] The EHD printing technique has been of great interest in the field of deposition of 2D materials, because this direct writing process integrates the deposition and patterning processes in one step. [ 20 ]…”

Section: Introductionmentioning

confidence: 99%

Engineering Aggregation‐Resistant MXene Nanosheets As Highly Conductive and Stable Inks for All‐Printed Electronics

Tang

Murali

Lee

et al. 2021

Adv Funct Materials

View full text Add to dashboard Cite

MXenes are interesting 2D materials that have been considered as attractive frontier materials for potential applications in the fields of energy and electronic devices due to their excellent optoelectronic properties including metallic conductivity and high optical transparency. However, it is still challenging to achieve compatibility for the as-synthesized MXene nanosheets with simple solution-deposition and patterning processes because of their limited solubility in many solvents. Here, a promising strategy is developed for obtaining alcohol-dispersible MXene nanosheets suitable for all-printed electronics while enhancing their electrical conductivity. This strategy includes a trifluoroacetic acid treatment-applied in order to contribute to the modification of intercalants between the MXene nanosheets-and achieves long-term dispersion of the MXene in alcoholic media and balanced jetting conditions during the electrohydrodynamic printing process. Furthermore, the high conductivity levels of the treated MXenes allow their printed patterns to be applied as gate and source/drain electrodes in all-printed logic circuits, displaying good and robust operation in transistors, inverters, and NAND, and NOR logic gates. This study provides a promising approach for modifying MXene nanosheets with the purpose of achieving desirable properties suitable for large-area printing processes, suggesting the feasibility of using MXene in practical applications involving all-printed electronics.

show abstract

“…Since the diameter of the jet is much smaller than the nozzle size, EHD printing can generate printing patterns with much better resolution than inkjet printing technique, which could reach micro‐ to nanoscale resolutions. [ 276 ] EHD printing has been applied for wide range of 2D materials, such as graphene, [ 277–279 ] BN, [ 279 ] MoS 2 , [ 28,278,279 ] and WS 2. [ 28,278 ]…”

Section: Methods Of Depositionmentioning

confidence: 99%

“…[ 276 ] EHD printing has been applied for wide range of 2D materials, such as graphene, [ 277–279 ] BN, [ 279 ] MoS 2 , [ 28,278,279 ] and WS 2. [ 28,278 ]…”

Section: Methods Of Depositionmentioning

confidence: 99%

“…[ 6,7 ] Moreover, they are more compatible with large‐area device fabrication on flexible substrate for wearable devices, such as polyethylene terephthalate (PET), [ 8,9 ] polydimethylsiloxane (PDMS), [ 10,11 ] polyethylene naphthalate (PEN), [ 12,13 ] and papers. [ 14,15 ] Photoactive materials for solution‐processing of photodetectors include inorganic materials such as quantum dots, [ 16,17 ] nanorods, [ 18–20 ] nanowires, [ 21–23 ] nanoplatelets, [ 24–26 ] and 2D materials, [ 27–29 ] and organic materials, such as organic molecules [ 30–32 ] and polymers. [ 33–35 ] Solution‐processes photoactive materials have great potentials for the next‐generation photodetecting applications.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Liquid‐Exfoliated 2D Materials for Optoelectronic Applications

Alzakia

Tan

2021

Advanced Science

Self Cite

View full text Add to dashboard Cite

Two‐dimensional (2D) materials have attracted tremendous research attention in recent days due to their extraordinary and unique properties upon exfoliation from the bulk form, which are useful for many applications such as electronics, optoelectronics, catalysis, etc. Liquid exfoliation method of 2D materials offers a facile and low‐cost route to produce large quantities of mono‐ and few‐layer 2D nanosheets in a commercially viable way. Optoelectronic devices such as photodetectors fabricated from percolating networks of liquid‐exfoliated 2D materials offer advantages compared to conventional devices, including low cost, less complicated process, and higher flexibility, making them more suitable for the next generation wearable devices. This review summarizes the recent progress on metal–semiconductor–metal (MSM) photodetectors fabricated from percolating network of 2D nanosheets obtained from liquid exfoliation methods. In addition, hybrids and mixtures with other photosensitive materials, such as quantum dots, nanowires, nanorods, etc. are also discussed. First, the various methods of liquid exfoliation of 2D materials, size selection methods, and photodetection mechanisms that are responsible for light detection in networks of 2D nanosheets are briefly reviewed. At the end, some potential strategies to further improve the performance the devices are proposed.

show abstract

Engineering the photoresponse of liquid-exfoliated 2D materials by size selection and controlled mixing for an ultrasensitive and ultraresponsive photodetector

Abstract: The performance of percolating thin film photodetectors fabricated from liquid-exfoliated 2D materials such as MoS2 and WS2 has been inferior compared to single-crystalline counterparts due to low-mobility arising from edge...

Cited by 35 publications

References 54 publications

Harnessing Ionic Power from Equilibrium Electrolyte Solution via Photoinduced Active Ion Transport through van‐der‐Waals‐Like Heterostructures

Harnessing Ionic Power from Equilibrium Electrolyte Solution via Photoinduced Active Ion Transport through van‐der‐Waals‐Like Heterostructures

Engineering Aggregation‐Resistant MXene Nanosheets As Highly Conductive and Stable Inks for All‐Printed Electronics

Liquid‐Exfoliated 2D Materials for Optoelectronic Applications

Contact Info

Product

Resources

About