Subphthalocyanine–triangulene dyads: Property tuning for light-harvesting device applications

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Organic photovoltaics relies on the development of stable chromophores and redox-active organic molecules with tailor-made HOMO/LUMO energies. Here, we present the synthesis and properties of novel dyads composed of boron subphthalocyanine (SubPc) and triangulene units, connected either at the peripheral position of the subphthalocyanine or at the axial boron. The connectivity has strong implications for the absorption and fluorescence properties of the dyads, as well as their redox properties. While the SubPc unit has a bowl shape, triangulene is a planar structural unit that allows dyads to dimerize in the solid state on account of π-stacking interactions as shown by X-ray crystallography of one of the dyads. The electronic properties were also studied computationally by density functional theory methods. Excellent agreement between experimental and computed data were obtained, showing that our computational method is a strong tool in the rational design of optimum molecules to ultimately obtain finely tuned molecules for device applications.

OriginalsprogEngelsk
TidsskriftEnergy Science and Engineering
Vol/bind10
Udgave nummer5
Sider (fra-til)1752–1762
Antal sider11
DOI
StatusUdgivet - 2022

Bibliografisk note

Funding Information:
The Independent Research Fund Denmark, Natural Sciences [grant number 8021‐00009B] and The Independent Research Fund Denmark, Technology and Production Sciences [grant number 0136‐00081B] are acknowledged for financial support. This project received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (Grant Agreement No. 716139) and the Swiss National Science Foundation (SNSF, PP00P2_170534 and PP00P2_198900).

Publisher Copyright:
© 2022 The Authors. Energy Science & Engineering published by the Society of Chemical Industry and John Wiley & Sons Ltd.

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