Doping stability and opto-electronic performance of chemical vapour deposited graphene on transparent flexible substrates

作者：Kang Moon H^*; Milne William I; Cole Matthew T

来源：IET Circuits, Devices and Systems, 2015, 9(1): 39-45.

DOI：10.1049/iet-cds.2014.0074

The primary barrier to wider commercial adoption of graphene lies in reducing the sheet resistance of the transferred material without compromising its high broad-band optical transparency, ideally through the use of novel transfer techniques and doping strategies. Here, chemical vapour deposited graphene was uniformly transferred to polymer supports by thermal and ultraviolet (UV) approaches and the time-dependent evolution of the opto-electronic performance was assessed following exposure to three kinds of common dopants. Doping with FeCl3 and SnCl2 showed minor, and notably time unstable, enhancement in the sigma(opt)/sigma(dc) figure of merit, while AuCl3-doping markedly reduced the sheet resistance by 91.5% to 0.29 k/sq for thermally transferred samples and by 34.4% to 0.62 k/sq for UV-transferred samples, offering a means of realising viable transparent flexible conductors that near the indium tin oxide benchmark.

• 出版日期2015-1