MoS2 Nanosheet Phototransistors with Thickness-Modulated Optical Energy Gap

被引：1216
作者：
Lee, Hee Sung [1 ]
Min, Sung-Wook [1 ]
Chang, Youn-Gyung [1 ]
Park, Min Kyu [3 ]
Nam, Taewook [2 ]
Kim, Hyungjun [2 ]
Kim, Jae Hoon [1 ]
Ryu, Sunmin [3 ]
Im, Seongil [1 ]
机构：
[1] Yonsei Univ, Inst Phys & Appl Phys, Seoul 120749, South Korea
[2] Yonsei Univ, Sch Elect & Elect Engn, Seoul 120749, South Korea
[3] Kyung Hee Univ, Dept Appl Chem, Yongin 446701, Gyeonggi, South Korea
来源：
NANO LETTERS | 2012年 / 12卷 / 07期
关键词：
MoS2; phototransistor; photoresponse; energy gap; PHOTOLUMINESCENCE; STATES;
D O I：
10.1021/nl301485q
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We report on the fabrication of top-gate phototransistors based on a few-layered MoS2 nanosheet with a transparent gate electrode. Our devices with triple MoS2 layers exhibited excellent photodetection capabilities for red light, while those with single- and double-layers turned out to be quite useful for green light detection. The varied functionalities are attributed to energy gap modulation by the number of MoS2 layers. The photoelectric probing on working transistors with the nanosheets demonstrates that single-layer MoS2 has a significant energy bandgap of 1.8 eV, while those of double- and triple-layer MoS2 reduce to 1.65 and 1.35 eV, respectively.
引用
收藏
页码：3695 / 3700
页数：6
相关论文
共 28 条
  • [1] Visibility of dichalcogenide nanolayers
    Benameur, M. M.
    Radisavljevic, B.
    Heron, J. S.
    Sahoo, S.
    Berger, H.
    Kis, A.
    [J]. NANOTECHNOLOGY, 2011, 22 (12)
  • [2] Ultrathin epitaxial graphite: 2D electron gas properties and a route toward graphene-based nanoelectronics
    Berger, C
    Song, ZM
    Li, TB
    Li, XB
    Ogbazghi, AY
    Feng, R
    Dai, ZT
    Marchenkov, AN
    Conrad, EH
    First, PN
    de Heer, WA
    [J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (52) : 19912 - 19916
  • [3] Stretching and Breaking of Ultrathin MoS2
    Bertolazzi, Simone
    Brivio, Jacopo
    Kis, Andras
    [J]. ACS NANO, 2011, 5 (12) : 9703 - 9709
  • [4] Ultrahigh electron mobility in suspended graphene
    Bolotin, K. I.
    Sikes, K. J.
    Jiang, Z.
    Klima, M.
    Fudenberg, G.
    Hone, J.
    Kim, P.
    Stormer, H. L.
    [J]. SOLID STATE COMMUNICATIONS, 2008, 146 (9-10) : 351 - 355
  • [5] Two-Dimensional Nanosheets Produced by Liquid Exfoliation of Layered Materials
    Coleman, Jonathan N.
    Lotya, Mustafa
    O'Neill, Arlene
    Bergin, Shane D.
    King, Paul J.
    Khan, Umar
    Young, Karen
    Gaucher, Alexandre
    De, Sukanta
    Smith, Ronan J.
    Shvets, Igor V.
    Arora, Sunil K.
    Stanton, George
    Kim, Hye-Young
    Lee, Kangho
    Kim, Gyu Tae
    Duesberg, Georg S.
    Hallam, Toby
    Boland, John J.
    Wang, Jing Jing
    Donegan, John F.
    Grunlan, Jaime C.
    Moriarty, Gregory
    Shmeliov, Aleksey
    Nicholls, Rebecca J.
    Perkins, James M.
    Grieveson, Eleanor M.
    Theuwissen, Koenraad
    McComb, David W.
    Nellist, Peter D.
    Nicolosi, Valeria
    [J]. SCIENCE, 2011, 331 (6017) : 568 - 571
  • [6] Dielectric screening in two-dimensional insulators: Implications for excitonic and impurity states in graphane
    Cudazzo, Pierluigi
    Tokatly, Ilya V.
    Rubio, Angel
    [J]. PHYSICAL REVIEW B, 2011, 84 (08)
  • [7] Photoluminescence from Chemically Exfoliated MoS2
    Eda, Goki
    Yamaguchi, Hisato
    Voiry, Damien
    Fujita, Takeshi
    Chen, Mingwei
    Chhowalla, Manish
    [J]. NANO LETTERS, 2011, 11 (12) : 5111 - 5116
  • [8] Graphene: Status and Prospects
    Geim, A. K.
    [J]. SCIENCE, 2009, 324 (5934) : 1530 - 1534
  • [9] Ghatak S, 2011, ACS NANO, V5, P7707, DOI [10.1021/nn202852J, 10.1021/nn202852j]
  • [10] Energy band-gap engineering of graphene nanoribbons
    Han, Melinda Y.
    Oezyilmaz, Barbaros
    Zhang, Yuanbo
    Kim, Philip
    [J]. PHYSICAL REVIEW LETTERS, 2007, 98 (20)
123