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Graphene–Ferroelectric Hybrid Structure for Flexible Transparent Electrodes

2012; American Chemical Society; Volume: 6; Issue: 5 Linguagem: Inglês

10.1021/nn3010137

1936-086X

Guangxin Ni, Yi Zheng, Sukang Bae, Chin Yaw Tan, Orhan Kahya, Jing Wu, Byung Hee Hong, Kui Yao, Barbaros Özyilmaz,

2D Materials and Applications

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 × 1013 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.