We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Chemical Design Rules for Non‐Fullerene Acceptors in Organic Solar Cells.
- Authors
Markina, Anastasia; Lin, Kun‐Han; Liu, Wenlan; Poelking, Carl; Firdaus, Yuliar; Villalva, Diego Rosas; Khan, Jafar I.; Paleti, Sri H. K.; Harrison, George T.; Gorenflot, Julien; Zhang, Weimin; De Wolf, Stefaan; McCulloch, Iain; Anthopoulos, Thomas D.; Baran, Derya; Laquai, Frédéric; Andrienko, Denis
- Abstract
Efficiencies of organic solar cells have practically doubled since the development of non‐fullerene acceptors (NFAs). However, generic chemical design rules for donor‐NFA combinations are still needed. Such rules are proposed by analyzing inhomogeneous electrostatic fields at the donor–acceptor interface. It is shown that an acceptor–donor–acceptor molecular architecture, and molecular alignment parallel to the interface, results in energy level bending that destabilizes the charge transfer state, thus promoting its dissociation into free charges. By analyzing a series of PCE10:NFA solar cells, with NFAs including Y6, IEICO, and ITIC, as well as their halogenated derivatives, it is suggested that the molecular quadrupole moment of ≈75 Debye Å balances the losses in the open circuit voltage and gains in charge generation efficiency.
- Subjects
SOLAR cells; PHOTOVOLTAIC power systems; MOLECULAR magnetic moments; MOLECULAR orientation; SOLAR cell efficiency; FULLERENES; OPEN-circuit voltage; ELECTROSTATIC fields
- Publication
Advanced Energy Materials, 2021, Vol 11, Issue 44, p1
- ISSN
1614-6832
- Publication type
Article
- DOI
10.1002/aenm.202102363