8 cm2/Vs, 18 times higher than that of the ZnO film. It has been reported that there is an important relationship between mobility and sheet resistance because the carriers can be easily scattered by lattice defects [33]. Accordingly, an enhancement of the mobility would decrease the sheet resistance and thereby promote the electrical conductivity. As a result, a low sheet resistance can be attained because the introduction of a graphene sheet leads to an increase in the overall mobility. Similarly, the stationary electrical performance

after bending was an issue of concern. From Table 1, it can be seen that high mobility and low sheet resistance were still observed after bending for 120 repetitions. The hybrid structure of ZnO NRs/graphene has not yet been fully optimized for use as a TCO layer. However, we have demonstrated its great find more potential for application in optoelectronic devices. Figure 4 A schematic illustration of the device fabricated for Hall measurement. Table 1 The results of Hall measurements of ZnO and ZnO NRs/graphene on PET substrate   Rs

Carrier concentration Mobility   (Ω cm) (cm3) (cm2/Vs) ZnO 0.9948 1012 6.72 ZnO NRs/graphene 0.2416 1012 124.8 ZnO NRs/graphene after bending 0.2426 1012 120.6 Conclusions Uniform ZnO NRs were obtained by hydrothermal https://www.selleckchem.com/products/tpx-0005.html method and grown on a graphene surface that had been transferred to a PET substrate. buy INK1197 The ZnO NR/graphene HS exhibited high transmittance (approximately 75%) over the visible wavelength range, even after cyclic bending with a small radius of curvature. Stable electrical conductance of the ZnO NR/graphene

HS was achieved, and the improvement of the ZnO sheet resistance Sirolimus in vitro by the incorporation of the graphene sheet can be attributed to the resultant increase in carrier mobility. Acknowledgements The authors are grateful to the part sponsor of this research, the National Science Council of the Republic of China, grants NSC 101-2622-E-027-026-CC3 and NSC 102-2221-E-027-009. References 1. Stutzmann N, Friend RH, Sirringhaus H: Self-aligned, vertical-channel, polymer field-effect transistors. Science 2003, 299:1881–1884.CrossRef 2. Thomas G: Materials science – invisible circuits. Nature 1997, 389:907–908.CrossRef 3. Geim AK, Novoselov KS: The rise of graphene. Nat Mater 2007, 6:183–191.CrossRef 4. Geim AK: Graphene: status and prospects. Science 2009, 324:1530–1534.CrossRef 5. Yang PK, Chang WY, Teng PY, Jen SF, Lin SJ, Chiu PW, He JH: Fully transparent resistive memory employing graphene electrodes for eliminating undesired surface effects. Proc IEEE 2013, 101:1732–1739.CrossRef 6. Tsai DS, Liu KK, Lien DH, Tsai ML, Kang CF, Lin CA, Li LJ, He JH: Few layer MoS 2 with broadband high photogain and fast optical switching for use in harsh environments. ACS Nano 2013, 7:3905–3911.CrossRef 7. Zhang YB, Tan YW, Stormer HL, Kim P: Experimental observation of the quantum Hall effect and Berry’s phase in graphene. Nature 2005, 438:201–204.CrossRef 8.