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Hybrid ZnO NR/graphene structures as advanced optoelectronic devices with high transmittance

Ren-Jei Chung1*, Zih-Cian Lin1, Po-Kang Yang2, Kun-Yu Lai3, Shou-Feng Jen4 and Po-Wen Chiu4

Author Affiliations

1 Department of Chemical Engineering and Biotechnology, National Taipei University of Technology (Taipei Tech), Taipei 10608, Taiwan, Republic of China

2 Institute of Photonics and Optoelectronics, Department of Electrical Engineering, National Taiwan University, Taipei 10617, Taiwan, Republic of China

3 Department of Optics and Photonics, National Central University, Jhongli City, Taoyuan County 32001, Taiwan, Republic of China

4 Department of Electrical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, Republic of China

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Nanoscale Research Letters 2013, 8:350  doi:10.1186/1556-276X-8-350

Published: 10 August 2013

Abstract

A hybrid structure (HS) made of one-dimensional ZnO nanorods (NRs) and a two-dimensional synthesized graphene sheet was successfully constructed in this study. The uniform ZnO NRs were obtained by hydrothermal method and grown on a graphene surface that had been transferred to a polyethylene terephthalate substrate. The HS exhibited high transmittance (approximately 75%) over the visible wavelength range, even after cyclic bending with a small radius of curvature. Raman spectroscopy and Hall measurement were carried out to verify the chemical composition and electrical properties of the structure. Stable electrical conductance of the ZnO NR/graphene HS was achieved, and increase in carrier mobility decreased the resistance of the ZnO-with-graphene sheet in comparison with bare ZnO NRs.

Keywords:
Hybrid structure; ZnO nanorods; Graphene sheet; Transmittance; Hall measurement