Volume 33, Issue 12 pp. 1380-1388
Full Paper

Graphene Nanoribbons from Tetraphenylethene-Based Polymeric Precursor: Chemical Synthesis and Application in Thin-Film Field-Effect Transistor

Ji Ma

Ji Ma

State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai 200433, China

Search for more papers by this author
Haoyun Zhu

Haoyun Zhu

State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai 200433, China

Search for more papers by this author
Wei Huang

Wei Huang

State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai 200433, China

Search for more papers by this author
Tingting Lin

Tingting Lin

Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, #08-03, Singapore 138634, Singapore

Search for more papers by this author
Xiaoyong Pan

Xiaoyong Pan

Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, #08-03, Singapore 138634, Singapore

Search for more papers by this author
Weizhi Wang

Corresponding Author

Weizhi Wang

State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai 200433, China

State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai 200433, China, Tel.: 0086-021-65643836Search for more papers by this author
First published: 15 December 2015
Citations: 4

Abstract

Graphene nanoribbons (GNRs) with a non-zero bandgap are regarded as a promising candidate for the fabrication of electronic devices. In this study, large-scale solution synthesis of narrow GNRs was firstly achieved by the intramolecular cyclodehydrogenation of kinked tetraphenylethene (TPE) polymer precursors prepared by A2B2-type Suzuki-Miyaura polymerization. After the cyclization reaction, the nanoribbons have a better conjugation than the twisted polymer precursor, resulting in obvious red shift in UV/vis absorption and photoluminescence (PL) spectra. The efficient formation of conjugated nanoribbons was also investigated by Raman, FTIR spectroscopy, and microscopic studies. Furthermore, such structurally well-defined GNRs have been successfully developed for top-gated field-effect transistor (FET) by directly solution processing. The AFM images show that the prepared-GNRs thin films form crystalline fibrillar intercalating networks, which can effectively facilitate the charge transport. These FET devices with ion-gel gate dielectrics exhibit low-voltage operation (<5 V) with excellent mobility up to 0.41 cm2·V−1·s−1 and an on-off ratio of 3×104, thus opening up new opportunities for flexible GNRs-based electronic devices.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.