skip to main content

DOE PAGESDOE PAGES

Title: Short-channel field-effect transistors with 9-atom and 13-atom wide graphene nanoribbons

Bottom-up synthesized graphene nanoribbons and graphene nanoribbon heterostructures have promising electronic properties for high-performance field-effect transistors and ultra-low power devices such as tunneling field-effect transistors. However, the short length and wide band gap of these graphene nanoribbons have prevented the fabrication of devices with the desired performance and switching behavior. Here, by fabricating short channel (L ch ~ 20 nm) devices with a thin, high-κ gate dielectric and a 9-atom wide (0.95 nm) armchair graphene nanoribbon as the channel material, we demonstrate field-effect transistors with high on-current (I on > 1 μA at V d = -1 V) and high I on /I off ~ 10 5 at room temperature. We find that the performance of these devices is limited by tunneling through the Schottky barrier at the contacts and we observe an increase in the transparency of the barrier by increasing the gate field near the contacts. Our results thus demonstrate successful fabrication of high-performance short-channel field-effect transistors with bottom-up synthesized armchair graphene nanoribbons.
Authors:
ORCiD logo [1] ;  [2] ;  [2] ;  [1] ; ORCiD logo [1] ;  [1] ;  [3] ;  [1] ;  [4] ;  [4] ;  [4] ;  [4] ;  [4] ;  [5] ; ORCiD logo [5] ;  [6] ;  [5] ;  [7] ;  [7] ; ORCiD logo [2] more »;  [7] ;  [7] ; ORCiD logo [8] ;  [1] « less
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  2. Swiss Federal Lab. for Materials Science and Technology, Dubendorf (Switzerland)
  3. Univ. of California, Berkeley, CA (United States); Samsung Electronics Co., Gyeonggi-do (Korea, Repubic of)
  4. Univ. of California, Berkeley, CA (United States)
  5. Max Planck Inst. for Polymer Research, Mainz (Germany)
  6. Dresden Univ. of Technology (Germany)
  7. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States); Kavli Energy NanoSciences Inst., Berkeley, CA (United States)
  8. Swiss Federal Lab. for Materials Science and Technology, Dubendorf (Switzerland); Univ. of Bern (Switzerland)
Publication Date:
Grant/Contract Number:
AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1416945