Liquid-based growth of polymeric carbon nitride layers and their use in a mesostructured polymer solar cell

Jingsan Xu^a, Jingsan Xu^a, Menny Shalom^a, Thomas Brenner^b

^aMax Planck Institute of Colloids and Interfaces - Potsdam, Research Campus Golm, D-14424 Potsdam, Germany

^bUniversity of Potsdam, Institute of Physics and Astronomy, Karl-Liebknecht-Str 24-25, Potsdam, 14476, Germany

Proceedings of International Conference on New Advances in Materials Research for Solar Fuels Production (SolarFuel14)

Montréal, Canada, 2014 June 25th - 26th

Organizer: Thomas Hamann

Poster, Jingsan Xu, 031
Publication date: 16th April 2014

Herein, we report a general, liquid-mediated pathway for the growth of continuous polymeric carbon nitride (C₃N₄) thin films. The deposition method consists of the use of supramolecular complexes which transform to liquid state before direct thermal condensation to C₃N₄ solid films. The resulting films exhibit continuous C₃N₄ networks on various substrates, including metal foil, FTO glass, and TiO₂/gold thin layer. The materials were characterized by SEM, TEM, XRD, FTIR, etc. Moreover, the optical absorption can be easily tuned to cover the solar spectrum by the insertion of an additional molecule into the starting complex. The strength of the deposition method is demonstrated by using the C₃N₄ layer as the electron acceptor in a polymer solar cell which exhibits a remarkable open circuit voltage exceeding 1V. The easy, safe and direct synthesis of carbon nitride in a continuous layered architecture on different functional substrates opens new possibilities for the fabrication of many energy-related devices.

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