4.8 Article

Epitaxial Ultrathin Organic Crystals on Graphene for High-Efficiency Phototransistors

Journal

ADVANCED MATERIALS
Volume 28, Issue 26, Pages 5200-+

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201600400

Keywords

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Funding

  1. National Key Basic Research Program of China [2013CBA01604, 2013CB932900, 2015CB921600]
  2. National Science Foundation of China [61325020, 61261160499, 11274154, 61521001, 11574136, 61575153]
  3. Research Grant Council of Hong Kong SAR [N_CUHK405/12]
  4. MICM Laboratory Foundation [9140C140105140C14070]
  5. Priority Academic Program Development of Jiangsu Higher Education Institutions
  6. Jiangsu Shuangchuang program
  7. Jiangsu Shuangchuang Team Program

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Epitaxially grown ultrathin organic semiconductors on graphene show great promise as highly efficient phototransistors. The devices exhibit a strong photoresponse down to the limit of a monolayer organic crystal, with a photoresponsivity higher than 10(4) A W-1 and a photoconductive gain over 10(8). The excellent performance is attributed to the high quality of the organic crystal and interface, a unique feature of van der Waals epitaxy.

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