Long-term air-stable Au doping of graphene by layer-by-layer assembly with graphene oxide for flexible transparent electrodes
- Authors
- Lee, Su Jin; Lim, Yi Rang; Ji, Seulgi; Kim, Seong Ku; Yoon, Yeoheung; Song, Wooseok; Myung, Sung; Lim, Jongsun; An, Ki-Seok; Park, Jin-Seong; Lee, Sun Sook
- Issue Date
- Jan-2018
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Graphene; Graphene oxide; Doping; Flexible transparent electrodes
- Citation
- CARBON, v.126, pp.241 - 246
- Indexed
- SCIE
SCOPUS
- Journal Title
- CARBON
- Volume
- 126
- Start Page
- 241
- End Page
- 246
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/17882
- DOI
- 10.1016/j.carbon.2017.09.108
- ISSN
- 0008-6223
- Abstract
- In order to realize the most suitable hybrid structure for air-stable graphene-based transparent and flexible electrodes, we systematically compared graphene oxide (GO)/Au/graphene and graphene/Au/GO hybrid films fabricated by layer-by-layer assembly. The sheet resistance of graphene/Au/GO was proportional to the concentration of AuCl3 (1-5 mg/ml), which can be understood by a significant blue-shift in the G-band associated with the phonon stiffening. The size and density of formed Au nanoparticles strongly influenced their reduction reaction, which is a crucial factor for maximizing the doping effects. The optimized optical transmittance and sheet resistance of GO/Au/graphene were 94.9% and 198 +/- 29 Ohm/sq, respectively. Furthermore, the hybrid films revealed stable doping effects (sheet resistance variation: 23-55%) against ambient conditions after 1 month. The variation in sheet resistance for GO/Au/graphene hybrid films corresponds to 30% with a bending radius of 10 mm after repeated bending tests (bending cycles of 10(5)).
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