Defect passivation of transition metal dichalcogenides via a charge transfer van der Waals interface

Park, Junhong; Sanne, Atresh; Guo, Yuzheng; Amani, Matin; Zhang, Kehao; Movva, Hema C. P.; Robinson, Joshua A.; Javey, Ali; Robertson, John; Banerjee, Sanjay K.; Kummel, Andrew C.

doi:10.1126/sciadv.1701661

Cited by 107 publications

(133 citation statements)

References 61 publications

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“…As a result, PL behavior of MoS 2 can be significantly tailored. [6,21,22] To our knowledge, the enhanced PL emission of TMDs could be achieved with the combination of organic semiconductors, such as pentacene, [3] perylene tetracarboxylic dianhydride, [23] titanyl phthalocyanine, [24] and inorganic materials such as lead iodide, [4] ZnO nanorods, [25] 2D layer (BN, MoTe 2 ), [26,27] and metal nanoparticles, [28,29] via charge carrier/energy transfer, strain relaxation, and surface plasmon effects. [3,4,20] In contrast, for TMD hybrid heterostructures with a type-II (staggered) band alignment photoinduced carriers can transfer through the interface and be separated at different material due to the large band offsets.…”

mentioning

confidence: 99%

MoS₂ and Perylene Derivative Based Type‐II Heterostructure: Bandgap Engineering and Giant Photoluminescence Enhancement

Obaidulla

Habib

Khan

et al. 2019

Adv Materials Inter

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2D transition metal dichalcogenides (TMDs) are a promising material system for optoelectronic applications. However, their key figure of merit, the room‐temperature photoluminescence (PL), is extremely low. To overcome this challenge, TMDs need interfacing with other semiconducting materials and discover the underlying physical phenomena. Herein, the optical properties and PL mechanisms of molybdenum disulfide‐organic perylene derivative (PDI/MoS2) based type‐II heterostructures, i.e., PTCDA/MoS2 and PTCDI‐Ph/MoS2, are studied experimentally and theoretically. The PL of MoS2 in PTCDA/MoS2 is enhanced, while a dramatic PL quenching of MoS2 is observed on PTCDI‐Ph/MoS2. The significant radiative PL enhancement of PTCDA/MoS2 is primarily due to the bandgap reduction, high exciton/trion ratio, and epitaxial growth of PTCDA. In contrast, “trap‐like” states in heterointerface, relatively low exciton/trion ratio, and less ordered morphology are responsible for PL quenching of PTCDI‐Ph/MoS2 heterostructure. These findings would provoke a new way to engineer the light‐matter interactions in organic/TMD hybrids, which enables light‐emitting, light‐harvesting applications, and neuromorphic devices.

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mentioning

confidence: 99%

MoS₂ and Perylene Derivative Based Type‐II Heterostructure: Bandgap Engineering and Giant Photoluminescence Enhancement

Obaidulla

Habib

Khan

et al. 2019

Adv Materials Inter

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“…Therefore, the stronger emission is observed in exfoliated nanosheets as compared to bulk from less than 1% (bulk) to over 82% (MoS 2 nanosheets) in a single stage, when Triton X‐100 is used as a non‐ionic surfactant for chemical exfoliation. This optical PL enchancement proceeds in a single stage whereas other reported paper show some treatment method required for enhancing PL of 2D materials, which is a cumbersome process . The kinetic theory is developed of luminescence quenching in the presence of migration of the excitations over the donors.…”

Section: Resultsmentioning

confidence: 99%

New Insights into the Triton X‐100 Induced Chemical Exfoliation of MoS₂ to Derive Highly Luminescent Nanosheets

et al. 2019

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The exfoliation of two dimensional (2D) transition metal dichalcogenides (TMDs) into mono‐ or few‐layers without compromising their semiconductor properties has momentous interest for both point of view; fundamental studies and further implementation in practical applications. Herein, we reported a novel and inexpensive approach for high yield nanosheets from bulk MoS2 to few layers of strong luminescent MoS2 nanosheets using Triton X‐100 as a surfactant with tailoring the bulk band gap 1.2 eV to 1.79 eV of few layers of nanosheets after chemical exfoliation process, which can be easily scaled‐up in large quantity. The microstructural results reveal that the exfoliated nanosheets have thickness in the range of few layers and lateral dimension in the range of few hundred nanometers. Our findings may offer a new innovative one setup chemical exfoliation process to design a few layer of MoS2 nanosheets without suppressing luminescent properties, which is highly desirable for the next generation optoelectronic devices.

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“…Therefore, they play a fundamental role in the functionalization of 2D crystals, especially those which do not possess π‐conjugated structure such as TMDs (e.g., MoS 2 , MoSe 2 , WS 2 , WSe 2 ) and black phosphorus. In particular, van der Waals interactions have been employed to assembly diazirines, spiropyrans, dihydroazulenes, azobenzenes, diarylethenes, perylene diimides, porphyrins, and phthalocyanines, especially metal‐derivatives in the last two cases, onto the surface of 2D materials in order to obtain photosensitive hybrid systems characterized by enhanced properties and performances. Finally, the noncovalent functionalization is a smart, poorly invasive and efficient approach to combine the remarkable properties of 2D materials with the fascinating and versatile photochemistry provided by light‐responsive molecular systems.…”

Section: Functionalization Of 2d Layers With Molecular Systemsmentioning

confidence: 99%

Functionalization of 2D Materials with Photosensitive Molecules: From Light‐Responsive Hybrid Systems to Multifunctional Devices

Zhao

Ippolito

Samorı́

2019

Advanced Optical Materials

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2D materials possess exceptional physical and chemical properties that render them appealing components for numerous potential applications in (opto)electronics, energy storage, sensing, and biomedicine. However, such unique properties are hardly tunable or modifiable. The functionalization of 2D crystals with molecules constitutes a powerful strategy to adjust and modulate their properties, by also imparting them new functions. In this framework, the combination of 2D materials with photosensitive molecules is a viable route for harnessing their light‐responsive nature. The latter takes full advantage of the extremely high sensitivity of 2D materials to subtle changes in the local environment and the capacity of photosensitive molecules to modify their intrinsic properties when exposed to electromagnetic fields. The hybrid molecule–2D materials can preserve the unique optical and electrical properties of 2D layers and can exhibit additional light‐tunable features. In this Progress Report, the protocols that can be pursued for the 2D material functionalization and switching mechanisms in photosensitive systems are reviewed, followed by an in‐depth discussion on their tunable optical properties and their exploitation when integrated in novel photoswitchable electronic devices. The opportunities and associated challenges to be tackled for the development of unprecedented and high‐performance light‐responsive devices are discussed.

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Defect passivation of transition metal dichalcogenides via a charge transfer van der Waals interface

Abstract: Adsorption of organic molecules passivates defect states on single-layer MoS2 via charge transfer.

Cited by 107 publications

References 61 publications

MoS₂ and Perylene Derivative Based Type‐II Heterostructure: Bandgap Engineering and Giant Photoluminescence Enhancement

MoS₂ and Perylene Derivative Based Type‐II Heterostructure: Bandgap Engineering and Giant Photoluminescence Enhancement

New Insights into the Triton X‐100 Induced Chemical Exfoliation of MoS₂ to Derive Highly Luminescent Nanosheets

Functionalization of 2D Materials with Photosensitive Molecules: From Light‐Responsive Hybrid Systems to Multifunctional Devices

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Defect passivation of transition metal dichalcogenides via a charge transfer van der Waals interface

Abstract: Adsorption of organic molecules passivates defect states on single-layer MoS2 via charge transfer.

Cited by 107 publications

References 61 publications

MoS2 and Perylene Derivative Based Type‐II Heterostructure: Bandgap Engineering and Giant Photoluminescence Enhancement

MoS2 and Perylene Derivative Based Type‐II Heterostructure: Bandgap Engineering and Giant Photoluminescence Enhancement

New Insights into the Triton X‐100 Induced Chemical Exfoliation of MoS2 to Derive Highly Luminescent Nanosheets

Functionalization of 2D Materials with Photosensitive Molecules: From Light‐Responsive Hybrid Systems to Multifunctional Devices

Contact Info

Product

Resources

About

MoS₂ and Perylene Derivative Based Type‐II Heterostructure: Bandgap Engineering and Giant Photoluminescence Enhancement

MoS₂ and Perylene Derivative Based Type‐II Heterostructure: Bandgap Engineering and Giant Photoluminescence Enhancement

New Insights into the Triton X‐100 Induced Chemical Exfoliation of MoS₂ to Derive Highly Luminescent Nanosheets