Molybdenum disulphide/titanium dioxide nanocomposite-poly 3-hexylthiophene bulk heterojunction solar cell

Shanmugam, Mariyappan; Bansal, Tanesh; Durcan, Chris; Yu, Bin

doi:10.1063/1.3703602

Cited by 151 publications

(93 citation statements)

References 25 publications

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“…Lee et al 144 have demonstrated that single-and double-layer MoS 2 , with respective bandgap energies of 1.8 and 1.65 eV, are effective for detecting green light, and triple-layer MoS 2 with a bandgap of 1.35 eV is well suited for red light. A bulk heterojunction solar cell made from TiO 2 nanoparticles, MoS 2 atomic layer nanosheets and poly(3-hexylthiophene) (P3HT) was recently demonstrated with 1.3% photoconversion efficiency 145 . Similarly, electrochemical solar cells with TiO 2 were sensitized with WS 2 , which acts as a stable, inorganic absorber material 146,147 .…”

Section: Optoelectronicsmentioning

confidence: 99%

Electronics and optoelectronics of two-dimensional transition metal dichalcogenides

et al. 2012

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699M any two-dimensional (2D) materials exist in bulk form as stacks of strongly bonded layers with weak interlayer attraction, allowing exfoliation into individual, atomically thin layers 1 . The form receiving the most attention today is graphene, the monolayer counterpart of graphite. The electronic band structure of graphene has a linear dispersion near the K point, and charge carriers can be described as massless Dirac fermions, providing scientists with an abundance of new physics 2,3 . Graphene is a unique example of an extremely thin electrical and thermal conductor 4 , with high carrier mobility 5 , and surprising molecular barrier properties 6,7 .Many other 2D materials are known, such as the TMDCs 8,9 , transition metal oxides including titania-and perovskite-based oxides 10,11 , and graphene analogues such as boron nitride (BN) 12,13 . In particular, TMDCs show a wide range of electronic, optical, mechanical, chemical and thermal properties that have been studied by researchers for decades 9,14,15 . There is at present a resurgence of scientific and engineering interest in TMDCs in their atomically thin 2D forms because of recent advances in sample preparation, optical detection, transfer and manipulation of 2D materials, and physical understanding of 2D materials learned from graphene.The 2D exfoliated versions of TMDCs offer properties that are complementary to yet distinct from those in graphene. Graphene displays an exceptionally high carrier mobility exceeding 10 6 cm 2 V -1 s -1 at 2 K (ref. 16) and exceeding 10 5 cm 2 V -1 s -1 at room temperature for devices encapsulated in BN dielectric layers 5 ; because pristine graphene lacks a bandgap, however, fieldeffect transistors (FETs) made from graphene cannot be effectively switched off and have low on/off switching ratios. Bandgaps can be engineered in graphene using nanostructuring [17][18][19] , chemical functionalization 20 and applying a high electric field to bilayer graphene 21 , but these methods add complexity and diminish mobility. In contrast, several 2D TMDCs possess sizable bandgaps around 1-2 eV (refs 9,14), promising interesting new FET and optoelectronic devices.TMDCs are a class of materials with the formula MX 2 , where M is a transition metal element from group IV (Ti, Zr, Hf and so on), group V (for instance V, Nb or Ta) or group VI (Mo, W and so on), and X is a chalcogen (S, Se or Te). These materials form layered structures of the form X-M-X, with the chalcogen atoms in two hexagonal planes separated by a plane of metal atoms, as shown in Fig. 1a. Adjacent layers are weakly held together to form the bulk crystal in a variety of polytypes, which vary in stacking orders and metal atom coordination, as shown in Fig. 1e. The overall symmetry of TMDCs is hexagonal or rhombohedral, and the metal atoms have octahedral or trigonal prismatic coordination. The electronic properties of TMDCs range from metallic to semiconducting, as summarized in Table 1. There are also TMDCs that exhibit exotic behaviours such as charge density waves ...

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Section: Optoelectronicsmentioning

confidence: 99%

Electronics and optoelectronics of two-dimensional transition metal dichalcogenides

et al. 2012

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“…Due to their 2D ultra-thin atomic layer structure, MoS 2 /WS 2 TMDs are shown to exhibit unique physical, optical and electrical properties [4,7]. Their fullerene like nature [8] and their excellent mechanical properties such as friction-reduction and self-lubrication [9] along with their unique optoelectronic properties (UV light absorption [10], band-gap tunability [1,2]) make MoS 2 /WS 2 nanostructures applicable in heterogeneous catalysis, hydrogen storage, lithium-magnesium ion batteries [11,12], various bio-medical applications [9,11,13] and as well as, various electronic and optoelectronic device applications (transistor, photo-transistor and solar cell applications) [2,7,4].…”

Section: Introductionmentioning

confidence: 99%

“…Their fullerene like nature [8] and their excellent mechanical properties such as friction-reduction and self-lubrication [9] along with their unique optoelectronic properties (UV light absorption [10], band-gap tunability [1,2]) make MoS 2 /WS 2 nanostructures applicable in heterogeneous catalysis, hydrogen storage, lithium-magnesium ion batteries [11,12], various bio-medical applications [9,11,13] and as well as, various electronic and optoelectronic device applications (transistor, photo-transistor and solar cell applications) [2,7,4]. Since they possess interesting optoelectonic properties that are tunable by physical layer thickness, various electronic and photonic devices are fabricated based on MoS 2 TMDs, such as hybrid bulk heterojunction solar cells (BHJs) [4], single-layer transistors [2], single-layer phototransistors [7] and back-gated bi-layer fieldeffect transistors [1]. Despite the fact that, single-layer MoS 2 has a large direct bandgap of 1.8 eV and a low electron mobility of 0.5-3 cm…”

Section: Introductionmentioning

confidence: 99%

“…Recently, Liu et al showed that, for MoS 2 TMD based transistors, it is further possible to achieve an electron mobility of 517 cm 2 V −1 s −1 using a multilayer MoS 2 flake as the channel material [14], compared to the single-layer one used by Radisavljevic [2]. In addition to transistor applications, it is shown in the literature that, MoS 2 TMDs are also potential candidates in solar cell applications [4,15]. In 1997 Gourmelon et al came up with the idea of using MoS 2 thin films in solar cell applications [15] and later on, Shanmugam et al fabricated a hybrid bulk heterojunction (BHJ) solar cell based on MoS 2 /TiO 2 nanocomposites and showed that MoS 2 TMDs are also applicable in solar cell applications [4].…”

Section: Introductionmentioning

confidence: 99%

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Thin film MoS_2 nanocrystal based ultraviolet photodetector

Alkis¹,

Öztaş²,

Aygün³

et al. 2012

Opt. Express

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Abstract:We report on the development of UV range photodetector based on molybdenum disulfide nanocrystals (MoS 2 -NCs). The inorganic MoS 2 -NCs are produced by pulsed laser ablation technique in deionized water and the colloidal MoS 2 -NCs are characterized by transmission electron microscopy, Raman spectroscopy, X-ray diffraction and UV/VIS absorption measurements. The photoresponse studies indicate that the fabricated MoS 2 -NCs photodetector (MoS 2 -NCs PD) operates well within 300-400 nm UV range, with diminishing response at visible wavelengths, due to the MoS 2 -NCs absorption characteristics. The structural and the optical properties of laser generated MoS 2 -NCs suggest promising applications in the field of photonics and optoelectronics. field-effect transistors and the effect of ambient on their performances," Appl.

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“…In the literature, it was also shown that MoS 2 is a potential candidate in solar cell applications. 17,18 Various properties and possible applications of 2D-MoS 2 and its nanoribbons have also been an active subject of theoretical studies. 19−23 All these recent research results clearly demonstrate that 2D MoS 2 NS present a great potential for nanoelectronic and nanophotonic applications.…”

Section: ■ Introductionmentioning

confidence: 99%

Synthesis of Colloidal 2D/3D MoS₂ Nanostructures by Pulsed Laser Ablation in an Organic Liquid Environment

et al. 2014

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Two-dimensional MoS 2 nanosheets (2D MoS 2 NS) and fullerene-like MoS 2 nanostructures (3D MoS 2 NS) with varying sizes are synthesized by nanosecond laser ablation of hexagonal crystalline 2H-MoS 2 powder in organic solution (methanol). Structural, chemical, and optical properties of MoS 2 NS are characterized by optical microscopy, scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and Raman and UV−vis−near infrared absorption spectroscopy techniques.Results of the structural analysis show that the obtained MoS 2 NS mainly present a layered morphology from micrometer to nanometer sized surface area. Detailed analysis of the product also proves the existence of inorganic polyhedral fullerene-like 3D MoS 2 NS generated by pulsed laser ablation in methanol. The possible factors which may lead to formation of both 2D and 3D MoS 2 NS in methanol are examined by ab initio calculations and shown to correlate with vacancy formation. The hexagonal crystalline structure of MoS 2 NS was determined by XRD analysis. In Raman spectroscopy, the peaks at 380.33 and 405.79 cm −1 corresponding to the E 1 2g and A 1g phonon modes of MoS 2 were clearly observed. The colloidal MoS 2 NS solution presents broadband absorption edge tailoring from the UV region to the NIR region. Investigations of MoS 2 NS show that the one-step physical process of pulsed laser ablation−bulk MoS 2 powder interaction in organic solution opens doors to the formation of "two scaled" micrometer-and nanometer-sized layered and fullerene-like morphology MoS 2 structures.

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Molybdenum disulphide/titanium dioxide nanocomposite-poly 3-hexylthiophene bulk heterojunction solar cell

Cited by 151 publications

References 25 publications

Electronics and optoelectronics of two-dimensional transition metal dichalcogenides

Electronics and optoelectronics of two-dimensional transition metal dichalcogenides

Thin film MoS_2 nanocrystal based ultraviolet photodetector

Synthesis of Colloidal 2D/3D MoS₂ Nanostructures by Pulsed Laser Ablation in an Organic Liquid Environment

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Molybdenum disulphide/titanium dioxide nanocomposite-poly 3-hexylthiophene bulk heterojunction solar cell

Cited by 151 publications

References 25 publications

Electronics and optoelectronics of two-dimensional transition metal dichalcogenides

Electronics and optoelectronics of two-dimensional transition metal dichalcogenides

Thin film MoS_2 nanocrystal based ultraviolet photodetector

Synthesis of Colloidal 2D/3D MoS2 Nanostructures by Pulsed Laser Ablation in an Organic Liquid Environment

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Synthesis of Colloidal 2D/3D MoS₂ Nanostructures by Pulsed Laser Ablation in an Organic Liquid Environment