Hexanary blends: a strategy towards thermally stable organic photovoltaics
Journal article, 2023
Non-fullerene based organic solar cells display a high initial power conversion efficiency but continue to suffer from poor thermal stability, especially in case of devices with thick active layers. Mixing of five structurally similar acceptors with similar electron affinities, and blending with a donor polymer is explored, yielding devices with a power conversion efficiency of up to 17.6%. The hexanary device performance is unaffected by thermal annealing of the bulk-heterojunction active layer for at least 23 days at 130 °C in the dark and an inert atmosphere. Moreover, hexanary blends offer a high degree of thermal stability for an active layer thickness of up to 390 nm, which is advantageous for high-throughput processing of organic solar cells. Here, a generic strategy based on multi-component acceptor mixtures is presented that permits to considerably improve the thermal stability of non-fullerene based devices and thus paves the way for large-area organic solar cells.
Author
Sri Harish Kumar Paleti
King Abdullah University of Science and Technology (KAUST)
Sandra Hultmark
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Jianhua Han
King Abdullah University of Science and Technology (KAUST)
Yuanfan Wen
King Abdullah University of Science and Technology (KAUST)
Han Xu
King Abdullah University of Science and Technology (KAUST)
Si Chen
King Abdullah University of Science and Technology (KAUST)
Emmy Järsvall
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Ishita Jalan
Karlstad University
Diego Rosas Villalva
King Abdullah University of Science and Technology (KAUST)
A. Sharma
King Abdullah University of Science and Technology (KAUST)
Jafar I. Khan
King Abdullah University of Science and Technology (KAUST)
Ellen Moons
Karlstad University
Ruipeng Li
Brookhaven National Laboratory
Liyang Yu
State Key Laboratory of Polymer Materials Engineering
Julien Gorenflot
King Abdullah University of Science and Technology (KAUST)
Frédéric Laquai
King Abdullah University of Science and Technology (KAUST)
Christian Müller
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Derya Baran
King Abdullah University of Science and Technology (KAUST)
Nature Communications
2041-1723 (ISSN) 20411723 (eISSN)
Vol. 14 1 4608-Subject Categories
Organic Chemistry
DOI
10.1038/s41467-023-39830-6
PubMed
37528112