Issue 46, 2022

Robust singlet fission process in strong absorption π-expanded diketopyrrolopyrroles

Abstract

Singlet fission (SF) has drawn tremendous attention as a multiexciton generation process that could mitigate the thermal loss and boost the efficiency of solar energy conversion. Although a SF-based solar cell with an EQE above 100% has already been fabricated successfully, the practical efficiency of the corresponding devices is plagued by the limited scope of SF materials. Therefore, it is of great importance to design and develop new SF-capable compounds aiming at practical device application. In the current contribution, via a π-expanded strategy, we presented a new series of robust SF chromophores based on polycyclic DPP derivatives, Ex-DPPs. Compared to conventional DPP molecules, Ex-DPPs feature strong absorption with a fivefold extinction coefficient, good molecular rigidity to effectively restrain non-radiative deactivation, and an expanded π-skeleton which endow them with well-suited intermolecular packing geometries for achieving efficient SF process. These results not only provide a new type of high-efficiency SF chromophore but also address some basic guidelines for the design of potential SF materials targeting practical light harvesting applications.

Graphical abstract: Robust singlet fission process in strong absorption π-expanded diketopyrrolopyrroles

Supplementary files

Article information

Article type
Edge Article
Submitted
09 Okt. 2022
Accepted
25 Okt. 2022
First published
16 Nov. 2022
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2022,13, 13907-13913

Robust singlet fission process in strong absorption π-expanded diketopyrrolopyrroles

L. Wang, W. Jiang, S. Guo, S. Wang, M. Zhang, Z. Liu, G. Wang, Y. Miao, L. Yan, J. Shao, Y. Zhong, Z. Liu, D. Zhang, H. Fu and J. Yao, Chem. Sci., 2022, 13, 13907 DOI: 10.1039/D2SC05580E

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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