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Van der Waals polarity-engineered 3D integration of 2D complementary logic

  • Yimeng Guo,
  • Jiangxu Li,
  • Xuepeng Zhan,
  • Chunwen Wang,
  • Min Li,
  • Biao Zhang,
  • Zirui Wang,
  • Yueyang Liu,
  • Kaining Yang,
  • Hai Wang,
  • Wanying Li,
  • Pingfan Gu,
  • Zhaoping Luo,
  • Yingjia Liu,
  • Peitao Liu,
  • Bo Chen,
  • Kenji Watanabe,
  • Takashi Taniguchi,
  • Xing-Qiu Chen,
  • Chengbing Qin,
  • Jiezhi Chen,
  • Dongming Sun,
  • Jing Zhang,
  • Runsheng Wang,
  • Jianpeng Liu,
  • Yu Ye,
  • Xiuyan Li,
  • Yanglong Hou,
  • Wu Zhou,
  • Hanwen Wang,
  • Zheng Han

摘要

Vertical three-dimensional integration of two-dimensional (2D) semiconductors holds great promise, as it offers the possibility to scale up logic layers in the z axis13. Indeed, vertical complementary field-effect transistors (CFETs) built with such mixed-dimensional heterostructures4,5, as well as hetero-2D layers with different carrier types68, have been demonstrated recently. However, so far, the lack of a controllable doping scheme (especially p-doped WSe2 (refs. 917) and MoS2 (refs. 11,1828)) in 2D semiconductors, preferably in a stable and non-destructive manner, has greatly impeded the bottom-up scaling of complementary logic circuitries. Here we show that, by bringing transition metal dichalcogenides, such as MoS2, atop a van der Waals (vdW) antiferromagnetic insulator chromium oxychloride (CrOCl), the carrier polarity in MoS2 can be readily reconfigured from n- to p-type via strong vdW interfacial coupling. The consequential band alignment yields transistors with room-temperature hole mobilities up to approximately 425 cm2 V−1 s−1, on/off ratios reaching 106 and air-stable performance for over one year. Based on this approach, vertically constructed complementary logic, including inverters with 6 vdW layers, NANDs with 14 vdW layers and SRAMs with 14 vdW layers, are further demonstrated. Our findings of polarity-engineered p- and n-type 2D semiconductor channels with and without vdW intercalation are robust and universal to various materials and thus may throw light on future three-dimensional vertically integrated circuits based on 2D logic gates.