Optimizing the Thermodynamics and Kinetics of the Triplet-Pair Dissociation in Donor-Acceptor Copolymers for Intramolecular Singlet Fission

Bibliographische Detailangaben
Veröffentlicht in:	Chemistry of materials : a publication of the American Chemical Society. - 1998. - 34(2022), 9 vom: 10. Mai, Seite 4115-4121
1. Verfasser:	Fumanal, Maria (VerfasserIn)
Weitere Verfasser:	Corminboeuf, Clémence
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2022
Zugriff auf das übergeordnete Werk:	Chemistry of materials : a publication of the American Chemical Society
Schlagworte:	Journal Article

Beschreibung
Zusammenfassung:	© 2022 The Authors. Published by American Chemical Society. Singlet fission (SF) is a two-step process in which a singlet splits into two triplets throughout the so-called correlated triplet-pair (1TT) state. Intramolecular SF (iSF) materials, in particular, have attracted growing interest as they can be easily implemented in single-junction solar cells and boost their power conversion efficiency. Still, the potential of iSF materials such as polymers and oligomers for photovoltaic applications has been partially hindered by their ability to go beyond the 1TT intermediate and generate free triplets, whose mechanism remains poorly understood. In this work, the main aspects governing the 1TT dissociation in donor-acceptor copolymers and the key features that optimize this process are exposed. First, we show that both thermodynamics and kinetics play a crucial role in the intramolecular triplet-pair separation and second, we uncover the inherent flexibility of the donor unit as the fundamental ingredient to optimize them simultaneously. Overall, these results provide a better understanding of the intramolecular 1TT dissociation process and establish a new paradigm for the development of novel iSF active materials
Beschreibung:	Date Revised 27.08.2024 published: Print-Electronic Citation Status PubMed-not-MEDLINE
ISSN:	0897-4756
DOI:	10.1021/acs.chemmater.2c00367