Wang Shengqi, Li Wenjie, Xue Junying, Ge Jifeng, He Jing, Hou Junyang, Xie Yu, Li Yuan, Zhang Hao, Sofer Zdeněk, Lin Zhaoyang
Department of Chemistry, Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Tsinghua University, Beijing, 100084, China.
Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28, Prague 6, Czech Republic.
Nat Commun. 2024 Jul 29;15(1):6388. doi: 10.1038/s41467-024-50697-z.
Solution-processable 2D semiconductor inks based on electrochemical molecular intercalation and exfoliation of bulk layered crystals using organic cations has offered an alternative pathway to low-cost fabrication of large-area flexible and wearable electronic devices. However, the growth of large-piece bulk crystals as starting material relies on costly and prolonged high-temperature process, representing a critical roadblock towards practical and large-scale applications. Here we report a general liquid-metal-assisted approach that enables the electrochemical molecular intercalation of low-cost and readily available crystal powders. The resulted solution-processable MoS nanosheets are of comparable quality to those exfoliated from bulk crystals. Furthermore, this method can create a rich library of functional 2D electronic inks ( >50 types), including 2D wide-bandgap semiconductors of low electrical conductivity. Lastly, we demonstrated the all-solution-processable integration of 2D semiconductors with 2D conductors and 2D dielectrics for the fabrication of large-area thin-film transistors and memristors at a greatly reduced cost.
基于使用有机阳离子对块状层状晶体进行电化学分子插层和剥离的可溶液加工二维半导体油墨，为低成本制造大面积柔性和可穿戴电子设备提供了一条替代途径。然而，作为起始材料的大片块状晶体的生长依赖于昂贵且耗时的高温工艺，这是迈向实际大规模应用的关键障碍。在此，我们报告了一种通用的液态金属辅助方法，该方法能够对低成本且易于获得的晶体粉末进行电化学分子插层。所得的可溶液加工的MoS纳米片与从块状晶体剥离的纳米片质量相当。此外，该方法可以创建丰富的功能性二维电子油墨库（>50种），包括低电导率的二维宽带隙半导体。最后，我们展示了二维半导体与二维导体和二维电介质的全溶液加工集成，以大幅降低成本制造大面积薄膜晶体管和忆阻器。
