▎ 摘　　要

Graphene has proven to be a promising material for transparent flexible electronics. In this study, we report the development of a transfer and doping scheme of large-area chemical vapour deposited (CVD) graphene. A technique to transfer the as-grown material onto mechanically flexible and optically transparent polymeric substrates using an ultraviolet adhesive (UVA) is outlined, along with the temporal stability of the sheet resistance and optical transparency following chemical doping with various metal chlorides (M(x)Cl(y)The sheet resistance (R-S) and 550nm optical transparency (%T-550) of the transferred un-doped graphene was 3.5ksq(-1) (+/- 0.2ksq(-1)) and 84.1% (+/- 2.9%), respectively. Doping with AuCl3 showed a notable reduction in R-S by some 71.4% (to 0.93ksq(-1)) with a corresponding %T-550 of 77.0%. After 200h exposure to air at standard temperature and pressure, the increase in R-S was found to be negligible (R-S AuCl3=0.06ksq(-1)), indicating that, of the considered MxCly species, AuCl3 doping offered the highest degree of time stability under ambient conditions. There appears a tendency of increasing R-S with time for the remaining metal chlorides studied. We attribute the observed temporal shift to desorption of molecular dopants. We find that desorption was most significant in RhCl3-doped samples whereas, in contrast, after 200h in ambient conditions, AuCl3-doped graphene showed only marginal desorption. The results of this study demonstrate that chemical doping of UVA-transferred graphene is a promising means for enhancing large-area CVD graphene in order to realise a viable platform for next-generation optically transparent and mechanically flexible electronics.