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一种简单的化学气相沉积法制备大尺寸单层二硫化钼

董艳芳 何大伟 王永生 许海腾 巩哲

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一种简单的化学气相沉积法制备大尺寸单层二硫化钼

董艳芳, 何大伟, 王永生, 许海腾, 巩哲

Synthesis of large size monolayer MoS2 with a simple chemical vapor deposition

Dong Yan-Fang, He Da-Wei, Wang Yong-Sheng, Xu Hai-Teng, Gong Zhe
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  • 最近单层二硫化钼以其直接带隙的性质及在电子器件、催化、光电等领域中的潜在应用而备受关注. 化学气相沉积法能够制备出高质量、大尺寸且性能优良的单层二硫化钼, 但其制备工艺比较复杂. 本文采用简化的化学气相沉积法在蓝宝石衬底上制备出了大尺寸的单晶二硫化钼. 清洗衬底时, 只需要简单的清洁, 不需要用丙酮、食人鱼溶液(H2SO4/H2O2=3:1)等处理, 这样既减少了操作步骤, 又避免了潜在的危险. 升温时直接从室温加热到生长的温度, 不必分段升温, 并且采用常压化学气相沉积法, 不需要抽真空等过程, 使得实验可以快捷方便地进行. 光学显微镜、拉曼光谱和光致发光谱的结果表明, 生长的二硫化钼为规则的三角形单层, 边长为50 m左右, 远大于机械剥离的样品.
    Monolayer molybdenum disulfide (MoS2) has recently aroused the great interest of researchers due to its direct-gap property and potential applications in electronics, catalysis, photovoltaics, and optoelectronics. Chemical vapor deposition (CVD) has been one of the most practical methods of synthesizing large-area and high-quality monolayer MoS2. However, The process of preparation is complex and cumbersome. Here we report that high-quality monolayer MoS2 can be obtained through using sulfurization of MoO3 by a simple and convenient CVD on sapphire substrates.The substrate cleaning is simplified. Substrates are cleaned in detergent solution, deionized water and acetone without sopropanol or piranha solution (H2SO4/H2O2=3:1) in sequence, avoiding their potential dangers. The MoO3 powder (Alfa Aesar, 99.995%, 0.02 g) is placed in an alumina boat, and a sapphire substrate is faced down and is placed 6 cm away from MoO3 powder in the same boat. The sapphire substrate is placed in the center of the heating zone of the furnace. Another alumina boat containing sulfur powder (Alfa Aesar, 99.999%, 0.2 g) is placed upstream with respect to the gas flow direction in the low temperature area. We adopt an atmospheric pressure chemical vapor deposition method, so it does not require a vacuum process. After 30 min of Ar purging, the furnace temperature is directly increased from room temperature to 800 ℃ in 30 min, reducing the heating steps. After 60 min, the furnace is cooled down naturally to room temperature. Optical microscopy (OM) images, Raman spectra and photoluminescence (PL) are all obtained by confocal Raman microscopic system (LabRAM HR Evolution). From the OM images, we can see that isolated islands (triangles) have edge lengths up to 50 m, which is far larger than that grown by micromechanical exfoliation. The color of the triangles is uniform, which has a strong contrast with the substrate. We can obtain a preliminary result that the sample is a uniform monolayer MoS2. Raman spectra are collected for MoS2 samples on sapphire substrates. Two typical Raman active modes can be found: E2g1 at 386.4 cm-1 and A1g at 406 cm-1 ( =19.6 cm-1), which correspond to single-layered MoS2 sample. Raman mapping shows that the sample is a uniform monolayer MoS2. The PL spectrum of MoS2 shows a pronounced emission peak at 669 nm, which is consistent with other reported results for MoS2 thin sheets obtained from exfoliation methods. When the layer number of MoS2 decreases, with its bandgap transforming from indirect to direct one, the fluorescence efficiency will be significantly enhanced. So the results further prove that the sample is high-quality monolayer MoS2.
      通信作者: 董艳芳, 13121559@bjtu.edu.cn
    • 基金项目: 国家自然科学基金(批准号: 61335006, 61527817, 61378073)和北京市科学技术委员会(批准号: Z151100003315006)资助的课题.
      Corresponding author: Dong Yan-Fang, 13121559@bjtu.edu.cn
    • Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 61335006, 61527817, 61378073) and the Beijing Municipal Science and Technology Commission, China (Grant No. Z151100003315006).
    [1]

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    Mak K F, Lee C G, Hone J, Shan J, Heinz T F 2010 Phys. Rev. Lett. 105 13

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    Zha L Y, Fang L, Peng X Y 2015 Acta Phys. Sin. 64 018710 (in Chinese) [张理勇, 方粮, 彭向阳 2015 物理学报 64 018710]

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    Xu D D, Wang X B, Qiu J L, Zhao Z F 2015 Chin. J. Colloid Polym. 33 37 (in Chinese) [徐豆豆, 王贤保, 邱家乐, 赵真凤 2015 胶体与聚合物 33 37]

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    Gu P C, Zhang K L, Feng Y L, Wang F, Miao Y P, Han Y M, Zhang H X 2016 Acta Phys. Sin. 65 018102 (in Chinese) [顾品超, 张楷亮, 冯玉林, 王芳, 苗银萍, 韩叶梅, 张韩霞 2016 物理学报 65 018102]

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    Perkgoz N K, Bay M 2016 Nano-Micro Lett. 8 70

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    Novoselov K S, Jiang D, Schedin F 2005 Proc. Natl. Acad. Sci. U.S.A 102 10451

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    Zeng Z Y, Yin Z Y, Huang X, Li H, He Q Y, Lu G, Boey F, Zhang H 2011 Angew Chem. Int. Ed. 50 11093

    [11]

    Yan Y, Xia B, Ge X, Liu Z, Wang J Y, Wang X 2013 ACS Appl. Mater. Interfaces 5 12794

    [12]

    Lee Y H, Zhang X Q, Zhang W J, Chang M T, Lin C T, Chang K D, Yu Y C, Tse J, Wang W, Chang C S, Li L J, Lin T W 2012 Adv. Mater. 24 2320

    [13]

    Zhan Y J, Liu Z, Najmaei S, Ajayan P M, Lou J 2012 Small 8 966

    [14]

    Lin Y C, Zhang W J, Huang J K, Liu K K, Lee Y H, Liang C T, Chu C W, Li L J 2013 Nano Lett. 13 1852

    [15]

    van der Zande A M, Huang P Y, Chenet D A, Berkelbach T C, You Y M, Lee G H, Heinz T F, Reichman D R, Muller D A, Hone J C 2013 Nat. Mater. 12 554

    [16]

    Jeon J, Jang S K, Jeon S M, Yoo G, Jang Y H, Park J H, Lee S 2012 Nanoscale 00 1

    [17]

    Lee C, Yan H, Brus L E, Heinz T F, Hone J, Ryu S 2010 ACS Nano. 4 2695

    [18]

    Splendiani A, Sun L, Zhang Y, Li T, Kim J, Chim C Y, Galli G, Wang F 2010 Nano Lett. 10 1271

    [19]

    Mak K F, He K, Shan J, Heinz T F 2012 Nat. Nanotechnol. 7 494

  • [1]

    Coehoorn R, Haas C, Dijkstra J, Flipse C J F 1987 Phys. Rev. B 35 6195

    [2]

    Wang Q H, Kalantar-Zadeh K, Kis A, Coleman J N, Strano M S 2012 Nat. Nanotechnol. 7 699

    [3]

    Radisavljevic B, Radenovic A, Brivio J, Giacometti V, Kis A 2011 Nat. Nanotechnol. 6 147

    [4]

    Mak K F, Lee C G, Hone J, Shan J, Heinz T F 2010 Phys. Rev. Lett. 105 13

    [5]

    Zha L Y, Fang L, Peng X Y 2015 Acta Phys. Sin. 64 018710 (in Chinese) [张理勇, 方粮, 彭向阳 2015 物理学报 64 018710]

    [6]

    Xu D D, Wang X B, Qiu J L, Zhao Z F 2015 Chin. J. Colloid Polym. 33 37 (in Chinese) [徐豆豆, 王贤保, 邱家乐, 赵真凤 2015 胶体与聚合物 33 37]

    [7]

    Gu P C, Zhang K L, Feng Y L, Wang F, Miao Y P, Han Y M, Zhang H X 2016 Acta Phys. Sin. 65 018102 (in Chinese) [顾品超, 张楷亮, 冯玉林, 王芳, 苗银萍, 韩叶梅, 张韩霞 2016 物理学报 65 018102]

    [8]

    Perkgoz N K, Bay M 2016 Nano-Micro Lett. 8 70

    [9]

    Novoselov K S, Jiang D, Schedin F 2005 Proc. Natl. Acad. Sci. U.S.A 102 10451

    [10]

    Zeng Z Y, Yin Z Y, Huang X, Li H, He Q Y, Lu G, Boey F, Zhang H 2011 Angew Chem. Int. Ed. 50 11093

    [11]

    Yan Y, Xia B, Ge X, Liu Z, Wang J Y, Wang X 2013 ACS Appl. Mater. Interfaces 5 12794

    [12]

    Lee Y H, Zhang X Q, Zhang W J, Chang M T, Lin C T, Chang K D, Yu Y C, Tse J, Wang W, Chang C S, Li L J, Lin T W 2012 Adv. Mater. 24 2320

    [13]

    Zhan Y J, Liu Z, Najmaei S, Ajayan P M, Lou J 2012 Small 8 966

    [14]

    Lin Y C, Zhang W J, Huang J K, Liu K K, Lee Y H, Liang C T, Chu C W, Li L J 2013 Nano Lett. 13 1852

    [15]

    van der Zande A M, Huang P Y, Chenet D A, Berkelbach T C, You Y M, Lee G H, Heinz T F, Reichman D R, Muller D A, Hone J C 2013 Nat. Mater. 12 554

    [16]

    Jeon J, Jang S K, Jeon S M, Yoo G, Jang Y H, Park J H, Lee S 2012 Nanoscale 00 1

    [17]

    Lee C, Yan H, Brus L E, Heinz T F, Hone J, Ryu S 2010 ACS Nano. 4 2695

    [18]

    Splendiani A, Sun L, Zhang Y, Li T, Kim J, Chim C Y, Galli G, Wang F 2010 Nano Lett. 10 1271

    [19]

    Mak K F, He K, Shan J, Heinz T F 2012 Nat. Nanotechnol. 7 494

计量
  • 文章访问数:  7220
  • PDF下载量:  694
  • 被引次数: 0
出版历程
  • 收稿日期:  2016-03-09
  • 修回日期:  2016-03-18
  • 刊出日期:  2016-06-05

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