Stable Organic Solar Cells with Enhanced Efficiency Built on Sodium Alginate

Year: 2025

Authors: Natali M., Maccagnani P., Dinelli F., Albonetti C., Cocchi M., Bertoldo M., Seri M.

Autors Affiliation: CNR, Inst Nanostruct Mat ISMN, Via P Gobetti 101, I-40129 Bologna, Italy; CNR, Natl Inst Opt INO, Via G Moruzzi 1, I-56124 Pisa, Italy; CNR, Inst Organ Synth & Photoreact ISOF, Via P Gobetti 101, I-40129 Bologna, Italy; Univ Ferrara, Dept Chem Pharmaceut & Agr Sci, Via L Borsari 46, I-44121 Ferrara, Italy.

Abstract: Bulk heterojunction (BHJ) organic solar cells can offer a range of specific advantages, making them suitable for potential integration into a wide variety of applications. This circumstance is driving an ever increasing attention to the environmental profile of this technology throughout its entire life cycle. Consequently, alternative materials and processes with a reduced environmental impact attract interest from researchers focused on developing a new generation of eco-designed devices. In this context, biomaterials represent an emerging class of sustainable alternatives suitable for use as active and passive components. For instance, some biomaterials can be successfully employed as alternative substrates for flexible solar cells, achieving performances comparable to those of state-of-the-art devices built on plastic. In this work, the preparation of organic solar cells is presented, integrating a water-processed sodium alginate film as a substrate, with the dual purpose of optimizing the efficiency of the resulting devices and investigating their stability. Specifically, PM6:Y6-based cells built on SA substrates exhibit a power conversion efficiency that exceeds 10% while showing excellent thermal and mechanical stabilities. These results demonstrate the potential of sodium alginate as a viable candidate for the realization of efficient and stable eco-designed devices.

Journal/Review: ADVANCED SUSTAINABLE SYSTEMS

Volume: 9 (4)      Pages from:   to:

More Information: This research was funded by the Mission Innovation program, Ministero dello Sviluppo Economico (MiSE), under the Grant Italian Energy Materials Acceleration Platform-IEMAP, and PNRR MUR Project ECS_00000033_ECOSISTER. M.S. wishes to thank Vincenzo Ragona (CNR-ISMN) for his valuable technical support.
KeyWords: biomaterial; device stability; flexible substrate; organic solar cell; sodium alginate
DOI: 10.1002/adsu.202401026