中国物理B ›› 2017, Vol. 26 ›› Issue (9): 97401-097401.doi: 10.1088/1674-1056/26/9/097401

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Tunneling field effect transistors based on in-plane and vertical layered phosphorus heterostructures

Shenyan Feng(冯申艳), Qiaoxuan Zhang(张巧璇), Jie Yang(杨洁), Ming Lei(雷鸣), Ruge Quhe(屈贺如歌)   

  1. State Key Laboratory of Information Photonics and Optical Communications and School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • 收稿日期:2017-04-07 修回日期:2017-05-24 出版日期:2017-09-05 发布日期:2017-09-05
  • 通讯作者: Ming Lei, Ruge Quhe E-mail:mlei@bupt.edu.cn;quheruge@bupt.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11604019, 61574020, and 61376018), the Ministry of Science and Technology of China (Grant No. 2016YFA0301300), the Fund of State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications), China, and the Fundamental Research Funds for the Central Universities, China (Grant No. 2016RCGD22).

Tunneling field effect transistors based on in-plane and vertical layered phosphorus heterostructures

Shenyan Feng(冯申艳), Qiaoxuan Zhang(张巧璇), Jie Yang(杨洁), Ming Lei(雷鸣), Ruge Quhe(屈贺如歌)   

  1. State Key Laboratory of Information Photonics and Optical Communications and School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2017-04-07 Revised:2017-05-24 Online:2017-09-05 Published:2017-09-05
  • Contact: Ming Lei, Ruge Quhe E-mail:mlei@bupt.edu.cn;quheruge@bupt.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11604019, 61574020, and 61376018), the Ministry of Science and Technology of China (Grant No. 2016YFA0301300), the Fund of State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications), China, and the Fundamental Research Funds for the Central Universities, China (Grant No. 2016RCGD22).

摘要:

Tunneling field effect transistors (TFETs) based on two-dimensional materials are promising contenders to the traditional metal oxide semiconductor field effect transistor, mainly due to potential applications in low power devices. Here, we investigate the TFETs based on two different integration types: in-plane and vertical heterostructures composed of two kinds of layered phosphorous (β-P and δ-P) by ab initio quantum transport simulations. NDR effects have been observed in both in-plane and vertical heterostructures, and the effects become significant with the highest peak-to-valley ratio (PVR) when the intrinsic region length is near zero. Compared with the in-plane TFET based on β-P and δ-P, better performance with a higher on/off current ratio of ~106 and a steeper subthreshold swing (SS) of ~23 mV/dec is achieved in the vertical TFET. Such differences in the NDR effects, on/off current ratio and SS are attributed to the distinct interaction nature of the β-P and δ-P layers in the in-plane and vertical heterostructures.

关键词: tunneling field effect transistors, negative differential resistance effect, on/off current ratio, subthreshold swing

Abstract:

Tunneling field effect transistors (TFETs) based on two-dimensional materials are promising contenders to the traditional metal oxide semiconductor field effect transistor, mainly due to potential applications in low power devices. Here, we investigate the TFETs based on two different integration types: in-plane and vertical heterostructures composed of two kinds of layered phosphorous (β-P and δ-P) by ab initio quantum transport simulations. NDR effects have been observed in both in-plane and vertical heterostructures, and the effects become significant with the highest peak-to-valley ratio (PVR) when the intrinsic region length is near zero. Compared with the in-plane TFET based on β-P and δ-P, better performance with a higher on/off current ratio of ~106 and a steeper subthreshold swing (SS) of ~23 mV/dec is achieved in the vertical TFET. Such differences in the NDR effects, on/off current ratio and SS are attributed to the distinct interaction nature of the β-P and δ-P layers in the in-plane and vertical heterostructures.

Key words: tunneling field effect transistors, negative differential resistance effect, on/off current ratio, subthreshold swing

中图分类号:  (Transport properties)

  • 74.25.F-
68.60.-p (Physical properties of thin films, nonelectronic) 71.15.Mb (Density functional theory, local density approximation, gradient and other corrections)