Perovskite-based Nanohybrids for Energy Conversion

Alejandro Cortés-Villena^a, Delia Bellezza^a, Carla Cunha^b, Ignacio Rosa-Pardo^a, Álvaro Seijas-Da Silva^a, João Pina^b, Gonzalo Abellán^a, J. Sérgio Seixas de Melo^b, Raquel E. Galian^a, Julia Pérez-Prieto^a

^aInstitute of Molecular Science, University of Valencia, c/Catedrático José Beltrán Martínez 2, 46980 Paterna, Valencia, Spain

^bCQC-IMS, Department of Chemistry, University of Coimbra, Coimbra P-3004-535, Portugal

Materials for Sustainable Development Conference (MATSUS)
Proceedings of MATSUS Fall 2024 Conference (MATSUSFall24)

#PeroMAT- Halide perovskite and perovskite- inspired materials: synthesis and applications

Lausanne, Switzerland, 2024 November 12th - 15th

Organizers: Raquel Galian, Lakshminarayana Polavarapu and Paola Vivo

Oral, Alejandro Cortés-Villena, presentation 054
DOI: https://doi.org/10.29363/nanoge.matsusfall.2024.054
Publication date: 28th August 2024

Energy-harvesting materials are currently on the rise, as solar energy provides the Earth with a considerable amount of energy.[1] Designing hybrids that harness the synergistic power of both systems is of great significance in such a context. Hence, the use of nanohybrids based on perovskite nanocrystals and photoactive organic molecules such as BODIPY dyes triggers the properties of wide and strong light absorption in the visible range and the generation of reactive species such as triplet excited states, respectively, which could potentially be used for organic photocatalysis.[2] In this contribution, we investigated the photophysical properties of nanocrystal-organic nanohybrids at the interface. For this end, CsPbBr₃ perovskite nanocrystals (NCs) have been merged with BODIPY dyes, specifically 8-(4-carboxyphenyl)-1,3,5,7-tetramethyl-4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BDP) and 8-(4-carboxyphenyl)-2,6-diiodo-1,3,5,7-tetramethyl-4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (I2-BDP). Through the use of steady-state and time-resolved absorption and photoluminescence techniques, we unveiled the sensitization mechanism of BODIPY dyes in the corresponding nanohybrids by selective excitation of the NCs. Spectroelectrochemical analysis and theoretical calculations confirm the generation of transient intermediate species, which are found to be crucial in the photosensitization mechanism. The efficient generation of triplet reactive species in I2-BDP allows the NC@I2-BDP nanohybrid to be used as a potential photocatalyst for the oxidation of α-terpinene to ascaridole via singlet oxygen formation.[3]

References:

[1] Service, R. F., Is It Time to Shoot for the Sun? Science 2005, 309, 5734, 548-551.

[2] DuBose, J. T.; Kamat, P. V. Energy Versus Electron Transfer: Managing Excited-State Interactions in Perovskite Nanocrystal-Molecular Hybrids Chem. Rev. 2022, 122, 15, 12475–12494.

[3] Cortés-Villena, A.; Bellezza, D.; Cunha, C.; Rosa-Pardo, I.; Da Silva, A. S.; Pina, J.; Abellán, G.; Seixas de Melo, J. S.; Galian, R. E.; Pérez-Prieto, J. Engineering Metal Halide Perovskite Nanocrystals with BODIPY Dyes for Photosensitization and Photocatalytic Applications J. Am. Chem. Soc. 2024, 146, 21, 14479–14492.

Acknowledgements:

C.-V, A. thanks the “Maria de Maeztu” Programme (CEX 2019-000919-M) for a predoctoral fellowship (PRE2018-084294). Financial support by Generalitat Valenciana (CIPROM/2022/57). This work has also received support from Laserlab-Europe (EU-H2020 871124).

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