Publication date: 17th February 2025
Multivariate covalent organic frameworks (COFs) offer a versatile and powerful platform for tuning photoconductivity in optoelectronic applications. The integration of different accepting (A) or donating (D) units within the same COF has a significant influence on its optical and electronic properties, making this approach particularly valuable for modulating these characteristics. The use of a multivariate method enables the precise adjustment of optoelectronic properties in isostructural frameworks, making them highly adaptable. In this study, we present the synthesis of pyrene-based donor-acceptor COFs, employing a multivariate reaction to incorporate two distinct acceptor units. By combining TPAP with various acceptors, a D-A heterojunction was formed, optimizing charge carrier transport. Structural and optoelectronic properties were thoroughly analyzed using techniques such as X-ray diffraction, nitrogen sorption isotherms, and photoconductivity measurements. The results demonstrate the potential of multicomponent COF design to enhance photoconductivity while maintaining crystallinity and porosity. This approach opens up new avenues for developing advanced semiconductor materials for future optoelectronic applications.
MICINN (TED2021-129886B-C43, PID2022-138908NB-C33), Comunidad de Madrid (TEC-2024/ECO-332) and the UCM (INV.GR.00.1819.10759) are acknowledged for the financial support.
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