articleAngewandte Chemie International EditionMay 18, 2014GREEN OA

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

GAGerardo Algara‐SillerNSNikolai SeverinSYSamantha Y. ChongTBTorbjörn BjörkmanRGRobert G. Palgrave

Universität Ulm · Humboldt-Universität zu Berlin · +7 more institutions

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Abstract

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…

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Topics & keywords

Topics
Keywords
  • Materials science
  • Carbon nitride
  • X-ray photoelectron spectroscopy
  • Band gap
  • Graphitic carbon nitride
  • Semiconductor
  • Optoelectronics
  • Carbon fibers
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