Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Reducing Voltage Losses in Organic Photovoltaics Requires Interfacial Disorder Management
Δημιουργός/Συγγραφέας:	Wang, Rong Han, Leng Li, Ning [EL] Χώχος, Χρήστος[EN] Chochos, Christos [EL] Γρηγορίου, Βασίλης Γ.[EN] Gregoriou, Vasilis G. Lüer, Larry Brabec, Christoph J.
Ημερομηνία:	2024
Γλώσσα:	Αγγλικά
ISSN:	1614-6832 1614-6840
DOI:	10.1002/aenm.202400609
Περίληψη:	Thanks to the introduction of non-fullerene acceptors, efficiencies of organic photovoltaics are now approaching 20%. Closing the gap with inorganic photovoltaics requires minimizing voltage losses without penalizing charge extraction, for which microstructure control is crucial. However, the complex interplay between microstructure and charge generation, recombination, and extraction has so far not been unraveled. Here, a systematic study linking device performance to distinct microstructural features via machine learning is presented. Building bi-layer devices allows to separately study the influence of aggregation and disorder on the energies and lifetimes of bulk and interfacial states. Unambiguous assignments of specific structural motifs to the device photophysics are thus possible. It is found that the control of aggregation-caused quenching is decisive for the exciton splitting efficiency and thus the carrier generation. Furthermore, the static disorder at the donor–acceptor interface controls the nonradiative recombination by shifting the excited state population from the bulk toward the interface. Finally, the amount of disorder in the bulk is found decisive for charge extraction. The finding that charge generation, recombination, and extraction are controlled by distinct structural features, is the key to optimizing these motifs independently, which will pave the way for organic photovoltaics toward the detailed balance limit.
Τίτλος πηγής δημοσίευσης:	Advanced Energy Materials
Τόμος/Κεφάλαιο:	14
Τεύχος:	26
Θεματική Κατηγορία:	[EL] Φωτοηλεκτρονικές συσκευές (Γενικά)[EN] Photoelectronic devices (General) [EL] Χημική τεχνολογία[EN] Chemical technolgy [EL] Χημικά προϊόντα: Παραγωγή, χρήση κλπ[EN] Chemicals: Manufacture, use etc. [EL] Ηλεκτρονική[EN] Electronics [EL] Εφαρμοσμένη οπτική. Φωτονική[EN] Applied optics. Photonics
Λέξεις-Κλειδιά:	interfacial energy states machine learning microstructure organic solar cells voltage loss
EU Grant identifier:	676639 461909888 4694 17007
Κάτοχος πνευματικών δικαιωμάτων:	© 2024 The Authors. Advanced Energy Materials published byWiley-VCH GmbH.
Όροι και προϋποθέσεις δικαιωμάτων:	This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Ηλεκτρονική διεύθυνση στον εκδότη (link):	ttps://doi.org/10.1002/aenm.202400609
Εμφανίζεται στις συλλογές:	Ινστιτούτο Χημικής Βιολογίας - Επιστημονικό έργο