Author, as appears in the article.: Moustafa, Enas; Mendez, Maria; Sanchez, Jose G; 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 / SANCHEZ LÓPEZ, JOSÉ GUADALUPE
Keywords: Thermal annealing Nonfullerene organic photovoltaics Interface morphology Binary heterojunctions Balanced electron/hole mobility Balanced electron thermal annealing nonfullerene organic photovoltaics interface morphology hole mobility binary heterojunctions
Abstract: Finding an effective approach to suppress trap formation is a potential route for enhancing the performance of nonfullerene organic photovoltaic (NF-OPVs) devices. Here, an extraordinary short-circuit current density (JSC) value of 32.65 mA cm-2 is achieved, higher than the state-of-the art NF-OPVs reported, reaching a high power conversion efficiency (PCE) of 17.92%. This remarkable enhancement is exhibited through the fine-tuning of PEDOT:PSS/PM6:Y7 films and interface morphologies via applying the prethermal treatment approach (Pre-TT) to the devices, which exhibit JSC and PCE enhancement of 21% and 8%, respectively, compared to the pristine devices. Accordingly, the dependence of the JSC upon the Pre-TT approach through a range of morphological, optical, electrical, and advanced transient measurements is investigated. The Pre-TT-based films are found to possess optimal smooth blend morphology with better dispersity owing to reduced domain size. Moreover, the measurements show that the optimized treated devices present higher exciton dissociation probabilities and generation rate of the free charge carriers, showing an ideal balanced electron/hole mobility that reveals the JSC and PCE enhancement. Hence, Pre-TT approach provides a facile passivation strategy that reduces the trap state density of the blend film, improves interface charge transfer, allows balanced electron/hole mobility, and thus promotes device performance.
Thematic Areas: Renewable energy, sustainability and the environment Physics, condensed matter Physics, applied Materials science, multidisciplinary Materials science (miscellaneous) Materials science (all) General materials science Energy & fuels Chemistry, physical
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: josep.pallares@urv.cat lluis.marsal@urv.cat
Author identifier: 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/aenm.202203241
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Advanced Energy Materials. 13 (4):
APA: Moustafa, Enas; Mendez, Maria; Sanchez, Jose G; Pallares, Josep; Palomares, Emilio; Marsal, Lluis F (2023). Thermal Activation of PEDOT:PSS/PM6:Y7 Based Films Leads to Unprecedent High Short-Circuit Current Density in Nonfullerene Organic Photovoltaics. Advanced Energy Materials, 13(4), -. DOI: 10.1002/aenm.202203241
Article's DOI: 10.1002/aenm.202203241
Entity: Universitat Rovira i Virgili
Journal publication year: 2023
Publication Type: Journal Publications