NIR Photosensitizers and Organic Electrolytes for Colorless And Transparent Dye Sensitized Solar Cells for Building Integration

Donato Pasculli^a, Ana Yancy Segura Zarate^a, Simone Galliano^b, Maksym Bokan^a, Matteo Bonomo^a^,^e, Nadia Barbero^a, Iacopo Benesperi^a, Raffaele Borrelli^b, Fabio Matteocci^d, Aldo Di Carlo^d, Frederic Sauvage^c, Claudia Barolo^a

^aDipartimento di Chimica, NIS Interdepartmental and INSTM Reference Centre, Università di Torino, Torino, Italy

^bDipartimento di Scienze Agrarie Forestali e Alimentari, Università degli Studi di Torino, IT, Largo Paolo Braccini, 2, Grugliasco, Italy

^cCNRS, UPJV, Université Picardie Jules Verne, LRCS, Laboratoire de réactivité et Chimie du Solide, UMR 7314, Amiens, France

^dCHOSE-Centre for Hybrid and Organic Solar Energy, Department of Electronic Engineering, University of Rome “Tor Vergata”, Via del Politecnico 1, 00133 Roma, Italy

^eDipartimento di Scienze di Base e Applicate per l’Ingegneria, Università degli Studi di Roma Sapienza, Via del Castro Laurenziano, 7, 00161 Roma, Italia

Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV25)

Roma, Italy, 2025 May 12th - 14th

Organizers: Filippo De Angelis, Francesca Brunetti and Claudia Barolo

Poster, Donato Pasculli, 244
Publication date: 17th February 2025

The development of integrated PV in windows/facades on buildings take us deeper in different aspects like aesthetics, stability and performance. With Dye Sensitized Solar Cells (DSSC) is possible to offer a sustainable option for transparent and colorless windows, due to their versatility in the selection of dyes and of the electrolytes [1]. Our group synthesized some Near Infra-Red polymethine dyes [2], the best of which (VG20-C16) led us to assemble a fully transparent and colorless DSSC reaching 80 % transmittance in complete devices using a novel hybrid organic electrolyte [3]. From this achievement, new NIR dyes were synthesized and tested in assembled devices demonstrating promising preliminary results. The other key component of these devices is represented by the redox mediator, that should be transparent and has to match the energetic levels of the NIR dye in order to regenerate them.

Novel disulphide/thiol organic redox mediator were synthesized and tested, both electrochemically and photochemically demonstrating compatibility with the photosensitizers.

References:

[1] Grifoni F.; Bonomo M.; Naim W.; Barbero N.; Alnasser T.; Dzeba I.; Giordano M.; Tsaturyan A.; Urbani M.; Torres T.; Barolo C.; Sauvage F. Toward Sustainable, Colorless, and Transparent Photovoltaics: State of the Art and Perspectives for the Development of Selective Near-Infrared Dye-Sensitized Solar Cells Adv. Energy Mat. 2021, 11 (43), 2101598. [1]

[2] Saccone D.; Galliano S.; Barbero N.; Quagliotto P.; Viscardi G.; Barolo C. Polymethine Dyes in Hybrid Photovoltaics: Structure–Properties Relationships. Europ. J. Org. Chem. 2016; 2244–2259. [2]

[3] Naim W.; Novelli V.; Nikolinakos I.; Barbero N.; Dzeba I.; Grifoni F.; Ren Y.; Alnasser T.; Velardo A.; Borrelli R.; Haacke S.; Zakeeruddin S. M.; Graetzel M.; Barolo C.; Sauvage F. Transparent and Colorless Dye-Sensitized Solar Cells Exceeding 75% Average Visible Transmittance. JACS Au 2021, 1, 4, 409-426. [3]

Acknowledgements:

This project has received funding from the European Union’s Horizon 2020 research and innovation program under Grand Agreement n° 826013. This study is a result of the research project “nuovi Concetti, mAteriali e tecnologie per l’iNtegrazione del fotoVoltAico negli edifici in uno scenario di generazione diffuSa” [CANVAS], funded by the Italian Ministry of the Environment and the Energy Security, through the Research Fund for the Italian Electrical System (type-A call, published on G.U.R.I. n. 192 on 18-08-2022).

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