Proceedings of MATSUS Fall 2023 Conference (MATSUSFall23)
DOI: https://doi.org/10.29363/nanoge.matsus.2023.040
Publication date: 18th July 2023
The employment of organic semiconductors (OSCs) promises to widen the realm of electronics to countless new applications, thanks to the advantageous properties of organics. Effectively, the field of organic electronics has been forging ahead from its initial proof-of-concept devices towards increasingly diverse materials and applications.
State-of-the-art high performance OSCs are derived from petrochemicals. Nevertheless, this class of materials can also be based on renewable, natural resources. Indeed, nature offers an extraordinary variety of systems that exhibit diverse opto-electronic functionalities. For instance, colours can vary in plants depending on the specific function, weather conditions and health/life cycle stage. Molecules responsible for this property are often dyes and pigments that show π-electron delocalization within their molecular structure and hence, that are potentially prone to showing optimal charge carrier transport properties and frontier energy levels compatible for charge injection.
Effectively, different natural molecules have been reported to display semiconducting properties and few of them have been used as active layers for electronic devices, e.g., organic thin film transistors (OTFTs). For instance, carotenoids are an interesting class of molecules, owing to their widespread availability in a large range of plants, algae, bacteria and fungi. They are hence compatible with a circular economy model, unravelling novel sustainable scenarios in organic electronics, besides being edible, thus contributing to the growth of the rising field of edible electronics. In this work we will show how a fine microstructural tuning of these materials can lead to the fabrication of efficient OTFTs with reasonable stability. Such results indicate that options for sustainable, edible semiconductors are available and can be exploited towards the integration into logic circuits.
The authors acknowledge the support of the European Research Council (ERC) under the European Union Horizon 2020 research and innovation programme within the project “ELFO”, Grant Agreement No. 864299.
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