Ultrahigh-performance transparent conductive films of carbon-welded isolated single-wall carbon nanotubes

Research output: Contribution to journalArticleScientificpeer-review

Researchers

  • Song Jiang
  • Peng Xiang Hou
  • Mao Lin Chen
  • Bing Wei Wang
  • Dong Ming Sun
  • Dai Ming Tang
  • Qun Jin
  • Qing Xun Guo
  • Ding Dong Zhang
  • Jin Hong Du
  • Kai Ping Tai
  • Jun Tan
  • Esko Kauppinen

  • Chang Liu
  • Hui Ming Cheng

Research units

  • Chinese Academy of Sciences
  • CAS - Shanghai Institute of Microsystem and Information Technology
  • University of Science and Technology of China
  • CAS - Changchun Institute of Applied Chemistry
  • Tsinghua University
  • ShanghaiTech University

Abstract

Single-wall carbon nanotubes (SWCNTs) are ideal for fabricating transparent conductive films because of their small diameter, good optical and electrical properties, and excellent flexibility. However, a high intertube Schottky junction resistance, together with the existence of aggregated bundles of SWCNTs, leads to a degraded optoelectronic performance of the films. We report a network of isolated SWCNTs prepared by an injection floating catalyst chemical vapor deposition method, in which crossed SWCNTs are welded together by graphitic carbon. Pristine SWCNT films show a record low sheet resistance of 41 ohm -1 at 90% transmittance for 550-nm light. After HNO3 treatment, the sheet resistance further decreases to 25 ohm -1. Organic light-emitting diodes using this SWCNT film as anodes demonstrate a low turn-on voltage of 2.5 V, a high current efficiency of 75 cd A-1, and excellent flexibility. Investigation of isolated SWCNT-based field-effect transistors shows that the carbon-welded joints convert the Schottky contacts between metallic and semiconducting SWCNTs into near-ohmic ones, which significantly improves the conductivity of the transparent SWCNT network. Ourwork provides a new avenue of assembling individual SWCNTs into macroscopic thin films, which demonstrate great potential for use as transparent electrodes in various flexible electronics.

Details

Original languageEnglish
Article numbereaap9264
Pages (from-to)1-10
JournalScience Advances
Volume4
Issue number5
Publication statusPublished - 4 May 2018
MoE publication typeA1 Journal article-refereed

Download statistics

No data available

ID: 21601006