DOI: https://doi.org/10.29363/nanoge.aohm.2019.043
Publication date: 8th January 2019
Coordination polymers have attracted a considerable amount of interest as a new class of organic–inorganic hybrid materials, owing to their unique infinite structures and electronic states formed by the combination of metal ions with versatile coordination architectures and a variety of organic bridging ligands. Until now, crystal engineering of coordination polymers greatly contributed to the development of functional materials, but it would be also important to develop new functional coordination polymers with amorphous structures for opto-electronic devices because of their advantages in the synthesis, control of physical properties and thin-films fabrication processes. We developed amorphous semiconducting coordination polymers consisting of copper(I) halides and hexaazatriphenylene. These complexes show semiconducting properties due to the small band-gaps. We also tried to apply the coordination polymers to bulk heterojunction organic solar cells, and found these coordination polymers worked as a buffer layer of the bulk heterojunction organic solar cells as a substitute for MoO3. In this symposium, we will present the electronic states and conducting properties of bulk samples and thin films of the amorphous semiconducting coordination polymers studied by UV-Vis-NIR spectroscopies, photoelectron spectroscopies, DC conductivity measurements and impedance measurements. In addition, we will also report the photovoltaic properties of the organic solar cells including the amorphous semiconducting coordination polymers.
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