High mobility, printable, and solution-processed graphene electronics.
High mobility, printable, and solution-processed graphene electronics.
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DOI：
10.1021/nl9028736
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发表时间：
2010
期刊：
影响因子：
10.8
通讯作者：
Shuai Wang;P. K. Ang;Ziqian Wang;A. Tang;J. Thong;K. Loh
中科院分区：
文献类型：
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作者：
Shuai Wang;P. K. Ang;Ziqian Wang;A. Tang;J. Thong;K. Loh
将石墨烯片印刷到大规模柔性基板上的能力为柔性基板上的大规模透明电子器件带来了希望。衍生自石墨的可溶液加工的石墨烯片可以在溶液中形成稳定的分散体，并且适于批量加工和喷墨印刷。然而，这种材料的电导率和载流子迁移率通常被报道为比机械切割的对应物差几个数量级，这是由于其更高的缺陷密度，这限制了其在电子学中的使用。在这里，我们表明，通过优化工艺中的几个关键因素，我们能够制造出来自大尺寸氧化石墨烯片的高迁移率石墨烯薄膜，这为全碳后CMOS电子器件铺平了道路。由这种薄膜制成的全碳源漏沟道电子器件表现出显著改善的输运特性，室温下在空气中测量的空穴载流子迁移率为365 cm（2）/（V.s），电子载流子迁移率为281 cm（2）/（V.s）。特别地，当施加离子屏蔽以消除带电杂质的库仑散射时，可以从这种溶液处理的石墨烯膜获得高达5000 cm（2）/（V.s）的固有迁移率。
The ability to print graphene sheets onto large scale, flexible substrates holds promise for large scale, transparent electronics on flexible substrates. Solution processable graphene sheets derived from graphite can form stable dispersions in solutions and are amenable to bulk scale processing and ink jet printing. However, the electrical conductivity and carrier mobilities of this material are usually reported to be orders of magnitude poorer than that of the mechanically cleaved counterpart due to its higher density of defects, which restricts its use in electronics. Here, we show that by optimizing several key factors in processing, we are able to fabricate high mobility graphene films derived from large sized graphene oxide sheets, which paves the way for all-carbon post-CMOS electronics. All-carbon source-drain channel electronics fabricated from such films exhibit significantly improved transport characteristics, with carrier mobilities of 365 cm(2)/(V.s) for hole and 281 cm(2)/(V.s) for electron, measured in air at room temperature. In particular, intrinsic mobility as high as 5000 cm(2)/(V.s) can be obtained from such solution-processed graphene films when ionic screening is applied to nullify the Coulombic scattering by charged impurities.