Phthalo- and Subphthalocyanines: Supramolecular Chemistry and Molecular Photovoltaics

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Date and time 17.10.2019 16:0017:00  
Place and room
Speaker Prof. Tomás TORRES
Institute for Advanced Research in Chemical Sciences,
Dpt of Organic Chemistry,
Autonoma University of Madrid, Spain
Category Conferences - Seminars
ChE-606 - Highlights in Energy Research seminar series
Phthalocyanines (Pcs)[1] are among the few molecules that reveal an intense red and NIR absorption and therefore, constitute promising dyes in molecular photovoltaics. Most recently they have reached record efficiency values participating as hole transporting materials in Perovskite sensitized solar cells (PSSCs). Phthalocyanines and derivatives stand out as donor /light harvesting molecules for the fabrication of both small-molecule organic solar cells and dye-sensitized solar cells (DSSCs). In this regard, A3B ZnPcs functionalized with bulky substituents at three isoindole rings (i.e. A) and a highly directional carboxylic acid linker at the other isoindole (i.e. B), have reached photovoltaic high power conversion efficiencies in n-type hybrid devices with mesoporous TiO2.  On the other hand Subphthalocyanines (SubPcs), [2] are intriguing compounds. Their 14 pi-electron aromatic core associated with their curved structures render them also appealing building blocks for the construction of multicomponent photo- or electroactive assemblies. Recently, SubPcs have been used as non-fullerene acceptors in both single (SHJ) and bulk heterojunctions (BHJ) solar cells. The organization of both Phthalo- and Subphthalocyanines at supramolecular level will be also discussed. Thus, columnar aggregates based on chiral SubPcs have been prepared, giving rise to ferroelectric self-assembled molecular materials showing both rectifying and switchable conductivity. These chromophores have been incorporated in multicomponent systems showing a panchromatic response and allowing the tuning and controlling intramolecular FÖRSTER Resonance Energy Transfer for Singlet Fission.
 
References
[1] a) M.-E. Ragoussi, T. Torres, Chem. Commun. 51, 3957 (2015). b) M. Sekita, et al., Angew. Chem. Int. Ed. 55, 5560 (2016). c) K. Cho, et al., Adv. Ener. Mater. 1601733 (2017). d) M. Urbani, Coord. Chem. Rev. 381, 1 (2019). e) O. Langmar, et al. Angew. Chem. Int. Ed.,  58, 4056 (2019).
[2] a) J. Guilleme, et al., Angew. Chem. Int. Ed. 54, 2543 (2015). b) K. Cnops, et al. J. Am. Chem. Soc. 137, 8991 (2015). c) C. Duan, et al., Angew. Chem. Int. Ed. 56, 148 (2017). d) A. V. Gorbunov, et al., Science Advances, 3, 1701017 (2017). e) G. Lavarda, et al. Angew. Chem. Int. Ed.57, 16291 (2018). f) C. Schierl, et al. Angew. Chem. Int. Ed.58, 14644 (2019).    

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Highlights in Energy Research

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