期刊
ACS NANO
卷 13, 期 5, 页码 5513-5522出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.9b00330
关键词
rosin; graphene; 2D materials; clean transfer; optoelectronic devices
类别
资金
- Ministry of Science and Technology of China [2016YFA0200101]
- National Science Foundation of China [51572265, 51861135201, 51325205, 51290273, 51521091]
- Chinese Academy of Sciences [KGZD-EW-303-1, KGZD-EW-303-3]
- Postdoctoral Science Foundation of China [2018M630309]
- Strategic Priority Research Program of Chinese Academy of Sciences [XDB30000000]
- Australian Research Council [FL160100067]
- Australian Government through the Australian Renewable Energy Agency (ARENA) Australian Centre for Advanced Photovoltaics
Clean transfer of two-dimensional (2D) materials grown by chemical vapor deposition is critical for their application in electronics and optoelectronics. Although rosin can be used as a support layer for the clean transfer of graphene grown on Cu, it has not been usable for the transfer of 2D materials grown on noble metals or for large-area transfer. Here, we report a poly(methyl methacrylate) (PMMA)/rosin double support layer that enables facile ultraclean transfer of large-area 2D materials glown on different metals. The bottom rosin layer ensures clean transfer, whereas the top PMMA layer not only screens the rosin from the transfer conditions but also improves the strength of the transfer layer to make the transfer easier and more robust. We demonstrate the transfer of monolayer WSe, and WS2 single crystals grown on Au as well as large-area graphene films grown on Cu. As a result of the clean surface, the transferred WSe2 retains the intrinsic optical properties of the as-grown sample. Moreover, it does not require annealing to form good ohmic contacts with metal electrodes, enabling highperformance field effect transistors with mobility and ON/OFF ratio,--10 times higher than those made by PMMAtransferred WSe2. The ultraclean graphene film is found to be a good anode for flexible organic photovoltaic cells with a high power conversion efficiency of,-6.4% achieved.
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