Recent graphene research has triggered enormous interest in new two-dimensional ordered crystals constructed by the inclusion of elements other than carbon for bandgap opening. The design of new multifunctional two-dimensional materials with proper bandgap has become an important challenge. Here we report a layered two-dimensional network structure that possesses evenly distributed holes and nitrogen atoms and a C 2 N stoichiometry in its basal plane. The two-dimensional structure can be efficiently synthesized via a simple wet-chemical reaction and confirmed with various characterization techniques, including scanning tunnelling microscopy. Furthermore, a field-effect transistor device fabricated using the material exhibits an on/off ratio of 10 7, with calculated and experimental bandgaps of approximately 1.70 and 1.96eV, respectively. In view of the simplicity of the production method and the advantages of the solution processability, the C 2 N-h2D crystal has potential for use in practical applications.
Bibliographical noteFunding Information:
This work was supported by the Creative Research Initiative (CRI), Mid-Career Researcher (MCR), BK21 Plus, Basic Science Research and Basic Research Laboratory (BRL) programs through the National Research Foundation (NRF) of Korea, and the US Air Force Office of Scientific Research (AFOSR). We thank Professor Hu-Young Jung at UNIST for assisting us with the acquisition of TEM images and Professors Konstantin Novoselov of Manchester University and Philip Kim of Harvard University for their thoughtful discussions on this work.
© 2015 Macmillan Publishers Limited.
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)
- Physics and Astronomy(all)