Author, as appears in the article.: Amelenan Torimtubun, Alfonsina Abat; Mendez, Maria; Moustafa, Enas; Pallares, Josep; Palomares, Emilio; Marsal, Lluis F
Department: Enginyeria Electrònica, Elèctrica i Automàtica
URV's Author/s: Marsal Garví, Luis Francisco / MÉNDEZ MÁLAGA, MARIA / Pallarès Marzal, Josep / Torimtubun, Alfonsina Abat Amelenan
Keywords: Transient photovoltage Ternary organic solar cells Nonfullerenes Impedance spectroscopy Fullerenes Alloy-like models
Abstract: A ternary strategy has been demonstrated as being an effective method to improve the power conversion efficiency (PCE); however, general rules for materials selection are not fully comprehended. Herein, nonfullerene acceptor ITIC-M and fullerene acceptor PC70BM possessing higher lowest unoccupied molecular orbital (LUMO) and good miscibility with nonfullerene acceptor Y7 are incorporated as third components in the state-of-the-art of PM6:Y7 binary blend. As a result, the device PCE for both ternary devices improves from 16.46% for binary host to 17.73% and 17.67% for ITIC-M- and PC70BM-based ternary devices, respectively. The higher LUMO of the guest acceptor can play multiple roles to elevate the open-circuit voltage such as reducing energy-loss and reverse saturation current, creating less-localized shallow trap sites along with suppressing charge recombination, and decreasing Urbach energy. Moreover, the good miscibility facilitates an alloy-like phase in acceptors domain for efficient exciton dissociation and electron transport, which leads to improved short-circuit current density and fill factor in ternary devices. The results provide a promising approach to realize high-performance ternary organic solar cells by synergizing the compatible third component with host acceptor.
Thematic Areas: Materials science, multidisciplinary Energy engineering and power technology Energy & fuels Electronic, optical and magnetic materials Electrical and electronic engineering Atomic and molecular physics, and optics
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: alfonsina.abat@estudiants.urv.cat alfonsina.abat@estudiants.urv.cat josep.pallares@urv.cat lluis.marsal@urv.cat
Author identifier: 0000-0001-8012-4772 0000-0001-8012-4772 0000-0001-7221-5383 0000-0002-5976-1408
Record's date: 2024-10-12
Papper version: info:eu-repo/semantics/publishedVersion
Link to the original source: https://onlinelibrary.wiley.com/doi/full/10.1002/solr.202300228
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Solar Rrl. 7 (11):
APA: Amelenan Torimtubun, Alfonsina Abat; Mendez, Maria; Moustafa, Enas; Pallares, Josep; Palomares, Emilio; Marsal, Lluis F (2023). Achieving 17.7% Efficiency of Ternary Organic Solar Cells by Incorporating a High Lowest Unoccupied Molecular Orbital Level and Miscible Third Component. Solar Rrl, 7(11), -. DOI: 10.1002/solr.202300228
Article's DOI: 10.1002/solr.202300228
Entity: Universitat Rovira i Virgili
Journal publication year: 2023
Publication Type: Journal Publications