Triazine-Based Graphitic Carbon Nitride: a Two-Dimensional Semiconductor

Graphitic carbon nitride has been predicted to be structurally analogous to carbon‐only graphite, yet with an inherent bandgap. We have grown, for the first time, macroscopically large crystalline thin films of triazine‐based, graphitic carbon nitride (TGCN) using an ionothermal, interfacial reactio...

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Bibliographic Details
Published in:Angewandte Chemie 2014-07, Vol.126 (29), p.7580-7585
Main Authors: Algara-Siller, Gerardo, Severin, Nikolai, Chong, Samantha Y., Björkman, Torbjörn, Palgrave, Robert G., Laybourn, Andrea, Antonietti, Markus, Khimyak, Yaroslav Z., Krasheninnikov, Arkady V., Rabe, Jürgen P., Kaiser, Ute, Cooper, Andrew I., Thomas, Arne, Bojdys, Michael J.
Format: Article
Language:eng ; ger
Subjects:
Carbon
Carbon nitride
Chemistry
Dünne Filme
Electronic devices
Field effect transistors
Graphen
Halbleiter
Interface reactions
Kohlenstoffnitrid
Light-emitting diodes
Mathematical analysis
Monomers
R&D
Research & development
Semiconductors
Spectrum analysis
Two dimensional
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Summary:Graphitic carbon nitride has been predicted to be structurally analogous to carbon‐only graphite, yet with an inherent bandgap. We have grown, for the first time, macroscopically large crystalline thin films of triazine‐based, graphitic carbon nitride (TGCN) using an ionothermal, interfacial reaction starting with the abundant monomer dicyandiamide. The films consist of stacked, two‐dimensional (2D) crystals between a few and several hundreds of atomic layers in thickness. Scanning force and transmission electron microscopy show long‐range, in‐plane order, while optical spectroscopy, X‐ray photoelectron spectroscopy, and density functional theory calculations corroborate a direct bandgap between 1.6 and 2.0 eV. Thus TGCN is of interest for electronic devices, such as field‐effect transistors and light‐emitting diodes. Nur fünf nichtmetallische Materialien der Graphenfamilie waren bisher bekannt: Graphen, hBN, BCN, Fluorgraphen und Graphenoxid. Erstmals werden nun kristalline dünne Filme aus Triazin‐basiertem graphitischem Kohlenstoffnitrid (TGCN) vorgestellt. TGCN ähnelt in seiner Struktur dem Graphit, ist aber ein Halbleiter. Die Filme bestehen aus wenigen bis mehreren hundert Atomlagen und haben eine direkte Bandlücke zwischen 1.6 und 2.0 eV.
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.201402191