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
a Max Planck Institute of Colloids and Interfaces - Potsdam, Research Campus Golm, D-14424 Potsdam, Germany
b University of Potsdam, Institute of Physics and Astronomy, Karl-Liebknecht-Str 24-25, Potsdam, 14476, Germany
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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