Direct transfer of graphene and application in low-voltage hybrid transistors. Issue 4 (12th January 2017)

• Record Type: Journal Article
• Authors: Zhu, Huihui; Liu, Ao; Shan, Fukai; Yang, Wenrong; Barrow, Colin; Liu, Jingquan
• Is Part Of: RSC advances. Volume 7:Issue 4(2017)
• Page Start: 2172
• Page End: 2179
• Publication Date: 2017-01-12
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra26452b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Scotch tape assisted direct transfer of graphene is presented. Transferred graphene can act as a carrier transport layer in In2 O3 /graphene/ZrO2 transistor. Abstract : A novel scotch tape assisted direct transfer of graphene onto different flexible and rigid substrates, including paper, polyethylene terephthalate, flat and curved glass, SiO2 /Si, and a solution-processed high- k dielectric layer is presented. This facile graphene transfer process is driven by the difference in adhesion energy of graphene with respect to tape and a target substrate. In addition, the graphene films transferred by scotch tape are found to be cleaner, more continuous, less doped and higher-quality than those transferred by PMMA. Based on that, the tape transferred graphene is employed as a carrier transport layer in oxide thin-film transistors (TFTs) with different gate dielectrics ( i.e., SiO2 and high- k ZrO2 ). The In2 O3 /graphene/SiO2 TFTs exhibit a high electron mobility of 404 cm 2 V −1 s −1 and a high on/off current ratio of 10 5, while the counterpart In2 O3 /graphene/ZrO2 TFTs exhibit improved electron transport properties at an ultra-low operating voltage of 3 V, which is 20 times lower than that of SiO2 -based devices. In contrast, the ZrO2 -based TFTs with PMMA-transferred graphene exhibit no detective electrical properties. Therefore, the proposed scotch tape assisted transfer method will be particularly useful for the production of graphene films and other two-dimensional materials in more cost-effective and environmentally friendly modes for broad practical applications beyond graphene-based field-effect transistors (GFETs).