Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542.
ACS Nano. 2012 May 22;6(5):3935-42. doi: 10.1021/nn3010137. Epub 2012 Apr 27.
Graphene has exceptional optical, mechanical, and electrical properties, making it an emerging material for novel optoelectronics, photonics, and flexible transparent electrode applications. However, the relatively high sheet resistance of graphene is a major constraint for many of these applications. Here we propose a new approach to achieve low sheet resistance in large-scale CVD monolayer graphene using nonvolatile ferroelectric polymer gating. In this hybrid structure, large-scale graphene is heavily doped up to 3 × 10(13) cm(-2) by nonvolatile ferroelectric dipoles, yielding a low sheet resistance of 120 Ω/□ at ambient conditions. The graphene-ferroelectric transparent conductors (GFeTCs) exhibit more than 95% transmittance from the visible to the near-infrared range owing to the highly transparent nature of the ferroelectric polymer. Together with its excellent mechanical flexibility, chemical inertness, and the simple fabrication process of ferroelectric polymers, the proposed GFeTCs represent a new route toward large-scale graphene-based transparent electrodes and optoelectronics.
石墨烯具有出色的光学、力学和电学性能，是新兴的光电、光子学和柔性透明电极应用材料。然而，石墨烯相对较高的面电阻是其在许多应用中的主要限制。在这里，我们提出了一种使用非易失性铁电聚合物门控实现大规模 CVD 单层石墨烯低面电阻的新方法。在这种混合结构中，通过非易失性铁电偶极子将大面积石墨烯重度掺杂至 3×10(13)cm(-2)，在环境条件下获得低至 120 Ω/□的面电阻。由于铁电聚合物的高透明性，石墨烯-铁电透明导体（GFeTC）在可见光到近红外范围内的透光率超过 95%。此外，由于其优异的机械柔韧性、化学惰性以及铁电聚合物简单的制造工艺，所提出的 GFeTC 为基于大规模石墨烯的透明电极和光电应用开辟了一条新途径。
