Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.348
Publication date: 16th December 2024
Sustainably-printed organic semiconductors are cornerstones in the pursue of environmentally-friendly, large-area solution-processed energy generation technologies such as organic photovoltaics. Among them, poly[[6,7-difluoro[(2-hexyldecyl)oxy]-5,8-quinoxalinediyl]-2,5-thiophenediyl]] (PTQ10) shines as semiconducting polymer with an inherently low synthetic cost and adequate compatibility with non-halogenated and non-aromatic solvents, thus meeting the requirements for a low cost, human- and environmentally-safer open-air film production with uncompromised device performance.
In this talk, the microstructural features of the archetypal PTQ10 polymer are thoroughly studied by x-ray diffraction and atomic force microscopy methods for its application onto sustainably printed organic solar cells. PTQ10 films processed by either spin or bar coating in neat and co-solvent formulations that match the up-scaling green processing requirements are showcased and rationalized in terms of characteristic structural features (e.g., d-spacings, degree of paracrystallinity) within the Hansen solubility framework. The use of PTQ10 as donor polymer in a non-halogenated photoactive layer blend is then presented and exploited to form versatile indoor and outdoor organic solar cells [1]. The industrial potential of this organic photovoltaic blend is further demonstrated in all-printed modular form factors, accordingly deployed for agrivoltaic energy harvesting in a domestic greenhouse in Sweden [2]. Unprecedented failure modes related with module delamination are therein observed as a consequence of the harsh humidity and thermal cycling conditions found inside the greenhouse. Overall, the use of PTQ10 and its variants as donor polymer shows enormous potential for efficient and sustainably-printed organic solar cells, photodetectors and thin film transistors.
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