Direct Chemical-Vapor-Deposition-Fabricated, Large-Scale Graphene Glass with High Carrier Mobility and Uniformity for Touch Panel Applications
Direct Chemical-Vapor-Deposition-Fabricated, Large-Scale Graphene Glass with High Carrier Mobility and Uniformity for Touch Panel Applications
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DOI：
10.1021/acsnano.6b06066
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发表时间：
2016-12-01
期刊：
影响因子：
17.1
通讯作者：
Liu, Zhongfan
中科院分区：
文献类型：
--
作者：
Sun, Jingyu;Chen, Zhaolong;Liu, Zhongfan
在这项工作中，我们报告了借助超快瞬态吸收显微镜（TAM）对玻璃上直接化学气相沉积（CVD）生长的石墨烯的载流子动力学和传输进行无转移测量，并演示了这种石墨烯玻璃在高性能触摸屏应用中的用途。 4.5英寸尺寸的石墨烯玻璃是通过优化的CVD工艺生产的，无需进一步处理即可轻松用作透明导电电极（TCE）。石墨烯玻璃同时表现出令人着迷的光学透过率和电导率，在透过率为82%时呈现出370-510 Omega.Sq(1)的方块电阻，比我们之前的成果有了很大的提高。此外，TAM对石墨烯载流子动力学和传输的直接测量揭示了与在Cu上生长的CVD石墨烯相似的双指数衰减行为，以及高达4820 cm(2).V-1.s(-1)的载流子迁移率。这种大面积、高度均匀、透明的导电石墨烯玻璃被组装成集成电阻式触摸面板，展示了高设备性能。简而言之，这项工作旨在展示优质石墨烯玻璃在可扩展和实际 TCE 应用中的巨大可行性。
In this work, we report the transfer-free measurement of carrier dynamics and transport of direct chemical vapor deposition (CVD) grown graphene on glass with the aid of ultrafast transient absorption microscopy (TAM) and demonstrate the use of such graphene glass for high-performance touch panel applications. The 4.5 in.-sized graphene glass was produced by an optimized CVD procedure, which can readily serve as transparent conducting electrode (TCE) without further treatment. The graphene glass exhibited an intriguing optical transmittance and electrical conductance concurrently, presenting a sheet resistance of 370-510 Omega.Sq(1) at a transmittance of 82%, much improved from our previous achievements. Moreover, direct measurement of graphene carrier dynamics and transport by TAM revealed the similar biexponential decay behavior to that of CVD graphene grown on Cu, along with a carrier mobility as high as 4820 cm(2).V-1.s(-1). Such large-area, highly uniform, transparent conducting graphene glass was assembled to integrate resistive touch panels that demonstrated a high device performance. Briefly, this work aims to present the great feasibility of good quality graphene glass toward scalable and practical TCE applications.