Simultaneous Transfer and Doping of CVD-Grown Graphene by Fluoropolymer for Transparent Conductive Films on Plastic
详细信息 查看全文
- 作者：Wi Hyoung Lee ; Ji Won Suk ; Jongho Lee ; Yufeng Hao ; Jaesung Park ; Jae Won Yang ; Hyung-Wook Ha ; Shanthi Murali ; Harry Chou ; Deji Akinwande ; Kwang S. Kim ; Rodney S. Ruoff
- 刊名：ACS Nano
- 出版年：2012
- 出版时间：February 28, 2012
- 年：2012
- 卷：6
- 期：2
- 页码：1284-1290
- 全文大小：463K
- 年卷期：v.6,no.2(February 28, 2012)
- ISSN：1936-086X
文摘
Chemical doping can decrease sheet resistance of graphene while maintaining its high transparency. We report a new method to simultaneously transfer and dope chemical vapor deposition grown graphene onto a target substrate using a fluoropolymer as both the supporting and doping layer. Solvent was used to remove a significant fraction of the supporting fluoropolymer, but residual polymer remained that doped the graphene significantly. This contrasts with a more widely used supporting layer, polymethylmethacrylate, which does not induce significant doping during transfer. The fluoropolymer doping mechanism can be explained by the rearrangement of fluorine atoms on the graphene basal plane caused by either thermal annealing or soaking in solvent, which induces ordered dipole moments near the graphene surface. This simultaneous transfer and doping of the graphene with a fluoropolymer increases the carrier density significantly, and the resulting monolayer graphene film exhibits a sheet resistance of 320 惟/sq. Finally, the method presented here was used to fabricate flexible and a transparent graphene electrode on a plastic substrate.