Tellurium-Assisted Low-Temperature Synthesis of MoS2 and WS2 Monolayers.

Chemical vapor deposition (CVD) is a scalable method able to synthesize MoS2 and WS2 monolayers. In this work, we reduced the synthesis temperature by 200 °C only by introducing tellurium (Te) into the CVD process. The as-synthesized MoS2 and WS2 monolayers show high phase purity and crystallinity. The optical and electrical performance of these materials is comparable to those synthesized at higher temperatures. We believe this work will accelerate the industrial synthesis of these semiconducting monolayers.

[1]  B. Brennan,et al.  Effect of disorder on Raman scattering of single-layer Mo S 2 , 2015 .

[2]  M. Pimenta,et al.  Comparative study of Raman spectroscopy in graphene and MoS2-type transition metal dichalcogenides. , 2015, Accounts of chemical research.

[3]  Ruitao Lv,et al.  Transition metal dichalcogenides and beyond: synthesis, properties, and applications of single- and few-layer nanosheets. , 2015, Accounts of chemical research.

[4]  Jun Lou,et al.  Vertical and in-plane heterostructures from WS2/MoS2 monolayers. , 2014, Nature materials.

[5]  M. Dresselhaus,et al.  Probing the interlayer coupling of twisted bilayer MoS2 using photoluminescence spectroscopy. , 2014, Nano letters.

[6]  Ana Laura Elías,et al.  Facile synthesis of MoS2 and MoxW1-xS2 triangular monolayers , 2014 .

[7]  Zhiwen Liu,et al.  Extraordinary Second Harmonic Generation in Tungsten Disulfide Monolayers , 2014, Scientific Reports.

[8]  A. Pan.  Growth of Alloy MoS2xSe2(1—x) Nanosheets with Fully Tunable Chemical Compositions and Optical Properties. , 2014 .

[9]  Jun Lou,et al.  CVD-grown monolayered MoS2 as an effective photosensor operating at low-voltage , 2014 .

[10]  Yiming Zhu,et al.  Semiconductors: Growth of Large‐Area 2D MoS2(1‐x)Se2x Semiconductor Alloys (Adv. Mater. 17/2014) , 2014 .

[11]  Wang Yao,et al.  Spin and pseudospins in layered transition metal dichalcogenides , 2014, Nature Physics.

[12]  T. Heinz,et al.  Postgrowth tuning of the bandgap of single-layer molybdenum disulfide films by sulfur/selenium exchange. , 2014, ACS nano.

[13]  Qing Zhang,et al.  Few-layer MoS2: a promising layered semiconductor. , 2014, ACS nano.

[14]  P. Ajayan,et al.  Chemical vapor deposition growth of crystalline monolayer MoSe2. , 2014, ACS nano.

[15]  M. Terrones,et al.  Electronic and vibrational properties of defective transition metal dichalcogenide Haeckelites: new 2D semi-metallic systems , 2014 .

[16]  P. Ajayan,et al.  Nanomechanical cleavage of molybdenum disulphide atomic layers , 2014, Nature Communications.

[17]  Ning Lu,et al.  Direct synthesis of van der Waals solids. , 2014, ACS nano.

[18]  A. M. van der Zande,et al.  Atomically thin p-n junctions with van der Waals heterointerfaces. , 2014, Nature nanotechnology.

[19]  D. Smirnov,et al.  New First Order Raman-active Modes in Few Layered Transition Metal Dichalcogenides , 2014, Scientific Reports.

[20]  M. Terrones,et al.  Bilayers of transition metal dichalcogenides: Different stackings and heterostructures , 2014 .

[21]  Il-Kwon Oh,et al.  Synthesis of wafer-scale uniform molybdenum disulfide films with control over the layer number using a gas phase sulfur precursor. , 2014, Nanoscale.

[22]  P. Ajayan,et al.  Band gap engineering and layer-by-layer mapping of selenium-doped molybdenum disulfide. , 2014, Nano letters.

[23]  L. Lauhon,et al.  Emerging device applications for semiconducting two-dimensional transition metal dichalcogenides. , 2014, ACS nano.

[24]  T. Mallouk,et al.  Electrochemical characterization of liquid phase exfoliated two-dimensional layers of molybdenum disulfide. , 2014, ACS applied materials & interfaces.

[25]  Jing Kong,et al.  Role of the seeding promoter in MoS2 growth by chemical vapor deposition. , 2014, Nano letters.

[26]  Lain‐Jong Li,et al.  Large-area synthesis of highly crystalline WSe(2) monolayers and device applications. , 2014, ACS nano.

[27]  M. Terrones,et al.  Ultrashort optical pulse characterization using WS₂ monolayers. , 2014, Optics letters.

[28]  T. Yu,et al.  Nonblinking, intense two-dimensional light emitter: monolayer WS2 triangles. , 2013, ACS nano.

[29]  J. Myoung,et al.  Layer-controlled, wafer-scale, and conformal synthesis of tungsten disulfide nanosheets using atomic layer deposition. , 2013, ACS nano.

[30]  M. Terrones,et al.  Photosensor Device Based on Few‐Layered WS2 Films , 2013 .

[31]  A. Neto,et al.  Strong Light-Matter Interactions in Heterostructures of Atomically Thin Films. , 2013 .

[32]  Yu Zhang,et al.  Epitaxial monolayer MoS2 on mica with novel photoluminescence. , 2013, Nano letters.

[33]  SUPARNA DUTTASINHA,et al.  Van der Waals heterostructures , 2013, Nature.

[34]  Blueshift of theA-exciton peak in folded monolayer1H-MoS2 , 2013, 1307.1720.

[35]  Yilei Li,et al.  Probing symmetry properties of few-layer MoS2 and h-BN by optical second-harmonic generation. , 2013, Nano letters.

[36]  Hua Zhang,et al.  Metal Dichalcogenide Nanosheets: Preparation, Properties and Applications , 2013 .

[37]  Madan Dubey,et al.  Electrical performance of monolayer MoS2 field-effect transistors prepared by chemical vapor deposition , 2013 .

[38]  Ruitao Lv,et al.  Controlled synthesis and transfer of large-area WS2 sheets: from single layer to few layers. , 2013, ACS nano.

[39]  Jing Kong,et al.  Intrinsic structural defects in monolayer molybdenum disulfide. , 2013, Nano letters.

[40]  Jean-Christophe Charlier,et al.  Identification of individual and few layers of WS2 using Raman Spectroscopy , 2013, Scientific Reports.

[41]  Lain-Jong Li,et al.  Large-Area Aiming Synthesis of WSe2 Monolayers , 2013, 1304.7365.

[42]  Dong Wang,et al.  Tunable band gap photoluminescence from atomically thin transition-metal dichalcogenide alloys. , 2013, ACS nano.

[43]  Junqiao Wu,et al.  Monolayer semiconducting transition metal dichalcogenide alloys: Stability and band bowing , 2013 .

[44]  M. Dresselhaus,et al.  Synthesis and transfer of single-layer transition metal disulfides on diverse surfaces. , 2013, Nano letters.

[45]  Mauricio Terrones,et al.  Novel hetero-layered materials with tunable direct band gaps by sandwiching different metal disulfides and diselenides , 2013, Scientific Reports.

[46]  E. Johnston-Halperin,et al.  Progress, challenges, and opportunities in two-dimensional materials beyond graphene. , 2013, ACS nano.

[47]  P. Ajayan,et al.  Second harmonic microscopy of monolayer MoS 2 , 2013, 1302.3935.

[48]  Timothy C. Berkelbach,et al.  Grains and grain boundaries in highly crystalline monolayer molybdenum disulphide. , 2013, Nature Materials.

[49]  Hongzheng Chen,et al.  Graphene-like two-dimensional materials. , 2013, Chemical reviews.

[50]  S. Haigh,et al.  Vertical field-effect transistor based on graphene-WS2 heterostructures for flexible and transparent electronics. , 2012, Nature nanotechnology.

[51]  Ruitao Lv,et al.  Extraordinary room-temperature photoluminescence in triangular WS2 monolayers. , 2012, Nano letters.

[52]  Boris I. Yakobson,et al.  Vapor Phase Growth and Grain Boundary Structure of Molybdenum Disulfide Atomic Layers , 2013 .

[53]  Qing Hua Wang,et al.  Electronics and optoelectronics of two-dimensional transition metal dichalcogenides. , 2012, Nature nanotechnology.

[54]  Jing Kong,et al.  van der Waals epitaxy of MoS₂ layers using graphene as growth templates. , 2012, Nano letters.

[55]  Lain‐Jong Li,et al.  Synthesis of Large‐Area MoS2 Atomic Layers with Chemical Vapor Deposition , 2012, Advanced materials.

[56]  Yu-Chuan Lin,et al.  Growth of large-area and highly crystalline MoS2 thin layers on insulating substrates. , 2012, Nano letters.

[57]  P. Ajayan,et al.  Large Area Vapor Phase Growth and Characterization of MoS2 Atomic Layers on SiO2 Substrate , 2011, 1111.5072.

[58]  A. Radenović,et al.  Single-layer MoS2 transistors. , 2011, Nature nanotechnology.

[59]  Gianaurelio Cuniberti,et al.  Direct low-temperature nanographene CVD synthesis over a dielectric insulator. , 2010, ACS nano.

[60]  Hugen Yan,et al.  Anomalous lattice vibrations of single- and few-layer MoS2. , 2010, ACS nano.

[61]  J. Shan,et al.  Atomically thin MoS₂: a new direct-gap semiconductor. , 2010, Physical review letters.

[62]  A. Splendiani,et al.  Emerging photoluminescence in monolayer MoS2. , 2010, Nano letters.

[63]  Andre K. Geim,et al.  Two-dimensional atomic crystals. , 2005, Proceedings of the National Academy of Sciences of the United States of America.