Abstract
We present a study of optical and electronic properties of solutions and films based on the fungi-derived pigment xylindein, extracted from decaying wood and processed without and with a simple purification step (“ethanol wash”). The “post-wash” xylindein solutions exhibited considerably lower absorption in the ultraviolet spectral range and dramatically reduced photoluminescence below 600 nm, due to removal of contaminants most likely to be fungal secondary metabolites. The “post-wash” xylindein-based films were characterized by two orders of magnitude higher charge carrier mobilities as compared to “pre-wash” samples. This underlines the importance of minimizing contaminants that disrupt the conductive xylindein network in xylindein-based electronic devices.
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Giesbers, G., Krueger, T., Van Schenck, J. et al. Fungi-derived xylindein: effect of purity on optical and electronic properties. MRS Advances 4, 1769–1777 (2019). https://doi.org/10.1557/adv.2019.269
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DOI: https://doi.org/10.1557/adv.2019.269